oftware connections built from the initial seed of the project. As always you can download the new release from Food4Rhino. Make sure to remove the older version of Ladybug and Honeybee and update your scripts.
This release is also special since today it is just about 3 years (3 years and 2 weeks) from the first release of Ladybug. As with any release, there have been a number of bug fixes and improvements but we also have some major news this time. In no specific order and to ensure that the biggest developments do not get lost in the extensive list of updates, here are the major ones:
Mostapha is re-writing Ladybug!
Ladybug for DynamoBIM is finally available.
Chris made bakeIt really useful by incorporating an export pathway to PDFs and vector-based programs.
Honeybee is now connected to THERM and the LBNL suite thanks to Chris Mackey.
Sarith has addressed a much-desired wish for Honeybee (Hi Theodore!) by adding components to model electric lighting with Radiance.
Djordje is on his way to making renewable energy deeply integrated with Ladybug by releasing components for modeling solar hot water.
There is new bug. Check the bottom of the post for Dragonfly!
Last but definitely not least (in case you’re not still convinced that this release is a major one) Miguel has started a new project that brings some of Ladybug’s features directly to Rhino. We mean Rhino Rhino - A Rhino plugin! Say hi to Icarus! #surprise
Before we forget! Ladybug and Honeybee now have official stickers. Yes! We know about T-Shirts and mugs and they will be next. For now, you can deck-out your laptops and powerhouse simulation machines with the symbology of our collaborative software ecosystem.
Now go grab a cup of tea/coffee and read the details below:
Rewriting Ladybug!
Perhaps the most far-reaching development of the last 4 months is an effort on the part of Mostapha to initiate a well structured, well documented, flexible, and extendable version of the Ladybug libraries. While such code is something that few community members will interact with directly, a well-documented library is critical for maintaining the project, adding new features, and for porting Ladybug to other software platforms.
The new Ladybug libraries are still under development across a number of new repositories and they separate a ladybug-core, which includes epw parsing and all non-geometric functions, from interface-specific geometry libraries. This allows us to easily extend Ladybug to other platforms with a different geometry library for each platform (ie. ladybug-grasshopper, ladybug-dynamo, ladybug-web, etc) all of which are developed on top of the ladybug-core.
Without getting too technical, here is an example of a useful outcome of this development. If you want to know the number of hours that relative humidity is more than 90% for a given epw, all that you have to code (in any python interface) is the following:
import ladybug as lb
_epwFile = r"C:\EnergyPlusV7-2-0\WeatherData\USA_CO_Golden-NREL.724666_TMY3.epw"
epwfile = lb.epw.EPW(_epwFile)
filteredData = epwfile.relativeHumidity.filterByConditionalStatement('x>90')
print "Number of hours with Humidity more than 90 is %d "%len(filteredData.timeStamps)
Compare that to the 500 + lines that you would have had to write previously for this operation, which were usually tied to a single interface! Now let’s see what will happen if you want to use the geometry-specific libraries. Let’s draw a sunpath in Grasshopper:
import ladybuggrasshopper.epw as epw
import ladybuggrasshopper.sunpath as sunpath
# get location data form epw file
location = epw.EPW(_epwFile).location
# initiate sunpath based on location
sp = sunpath.Sunpath.fromLocation(location, northAngle = 0, daylightSavingPeriod = None, basePoint =cenPt, scale = scale, sunScale = sunScale)
# draw sunpath geometry
sp.drawAnnualSunpath()
# assign geometries to outputs
...
Finally we ask, how would this code will look if we wanted to make a sunpath for dynamo? Well, it will be exactly the same! Just change ladybuggrasshopper in the second line to ladybugdynamo! Here is the code which is creating the sunpath below.
With this ease of scripting, we hope to involve more of our community members in our development and make it easy for others to use ladybug in their various preferred applications. By the next release, we will produce an API documentation (documentation of all the ladybug classes, methods and properties that you can script with) and begin making tutorials for those interested in getting deeper into Ladybug development.
LADYBUG
1 - Initial Release of Ladybug for Dynamo:
As is evident from the post above, we are happy to announce the first release of Ladybug for Dynamo! You can download the ladybug package from Dynamo package manager. Make sure to download version 0.0.6 which is actually 0.0.1! It took a number of trial and errors to get it up there. Once you have the file downloaded you can watch these videos to get started:
The source code can be find under ladybug-dynamo repository and (as you can already guess) it is using the new code base. It includes a very small toolkit of essential Ladybug components/nodes but it has enough to get you started. You can import weather files, draw sunpaths and run sunlighthours or radiation analyses.
There are two known issues in this release but neither of them is critical. You need to have Dynamo 0.9.1 or higher installed which you can download from here (http://dynamobuilds.com/). It is recommended that you run the scripts with ‘Manual’ run (as opposed to ‘Automatic’) since the more intense calculations can make Dynamo crash in automatic mode.
To put things in perspective, here is how we would map Ladybug for Dynamo vs Ladybug and Honeybee for Grasshopper on the classic ‘Hype graph’. The good news is that what we learned a lot from the last three years, making development of the Dynamo version easier and getting us to the plateau of productivity faster.
We should also note that the current development of the Dynamo interface is behind that of the Ladybug-Core, which means there are a number of features that are developed in the code but haven’t made their way to the nodes yet. They will be added gradually over the next month or two.
If you’re interested to get involved in the development process or have ideas for the development, follow ladybug on Facebook, Twitter and Github. We will only post major release news here. Facebook, github and twitter will be the main channels for posting the development process. There will also be a release of a new ladybug for Grasshopper soon that will use the came Ladybug-Core libraries as the Dynamo interface [Trying hard not to name it as Ladybug 2].
2 - New Project “Icarus” Provides Ladybug Capabilities Directly in Rhino
Speaking of expanded cross-platform capabilities, the talented Miguel Rus has produced a standalone Rhino Plugin off of the original Ladybug code that has been included in this release. After writing his own core C# libraries, Miguel’s plugin enables users to produce sunpath and run sunlight hours analyses in the Rhino scene without need of opening Grasshopper or engaging the (sometimes daunting) act of visual scripting.
This release includes his initial RHP plugin file. It is hoped that Miguel’s efforts will extend some of the capabilities of environmental design to individuals who are unfamiliar with visual scripting, casting the network of our community into new territory. We need your help spreading the word about Icarus since the people who will benefit the most from it have probably not read this far into the release notes. Also, as the project is in the early stages, your feedback can make a great difference. You can download the current release from this link.
Once you download the zip file. Right click and unblock it. Then extract the files under C:\Program Files\Rhinoceros 5 (64-bit)\Plug-ins\ folder. Drag and drop the RHP file into Rhino and you should be ready to go. You can either type Icarus in the command line or open it via the panels. Here is a short video that shows how to run a sunlighhours analysis study in Rhino.
3 - BakeIt Input Now Supports a Pathway to PDF +Vector Programs
As promised in the previous release, the BakeIt_ option available on Ladybug’s visual components has been enhanced to provide a full pathway to vector-based programs (like Illustrator and Inkscape) and eases the export to vector formats like PDFs.
This means that the BakeIt_ operation now places all text in the Rhino scene as actual editable text (not meshes) and any colored meshes are output as groups of colored hatches (so that they appear as color-filled polygons in vector-based programs). There is still an option to bake the colored geometries as light meshes (which requires smaller amounts of memory and computation time) but the new hatched capability should make it easier to incorporate Ladybug graphics in architectural drawings and documents like this vector psychrometric chart.
4 - Physiological Equivalent Temperature (PET) Now Available
Thanks to the efforts of Djordje Spasic, it is now possible to compute the common outdoor comfort metric ‘Physiological Equivalent Temperature’ (PET) with Ladybug. The capability has been included with this release of “Thermal Comfort Indices” component and is supported by a “Body Characteristics” component in the Extra tab. PET is particularly helpful for evaluating outdoor comfort at a high spatial resolution and so the next Honeybee release will include an option for PET with the microclimate map workflow.
5 - Solar Hot Water Components Available in WIP
Chengchu Yan and Djordje Spasic have built a set of components that perform detailed estimates of solar hot water. The components are currently undergoing final stages of testing and are available in the WIP tab of this release. You can read the full release notes for the components here.
6 - New Ladybug Graphic Standards
With the parallel efforts or so many developers, we have made an effort in this release to standardize the means by which you interact with the components. This includes warnings for missing inputs and the ability to make either icons or text appear on the components as you wish (Hi Andres!). A full list of all graphic standards can be found here. If you have any thoughts or comments on the new standards, feel free to voice them here.
7 - Wet Bulb Temperature Now Available
Thanks to Antonello Di Nunzio - the newest member of the Ladybug development team, it is now possible to calculate wet bulb temperature with Ladybug. Antonello’s component can be found under the WIP tab and takes inputs of dry bulb temperature, relative humidity, and barometric pressure.
8 - New View Analysis Types
The view analysis component now allows for several different view studies in addition to the previous ‘view to test points.’ These include, skyview (which is helpful for studies of outdoor micro-climate), as well as spherical view and ‘cone of vision’ view, which are helpful for indoor studies evaluating the overall visual connection to the outdoors.
HONEYBEE
1 - Connection to THERM and LBNL Programs
With this release, many of you will notice that a new tab has been added to Honeybee. The tab “11 | THERM” includes 7 new components that enable you to export ready-to-simulate Lawrence Berkeley National Lab (LBNL) THERM files from Rhino/Grasshopper. THERM is a 2D finite element heat flow engine that is used to evaluate the performance of wall/window construction details by simulating thermal bridging behavior. The new Honeybee tab represents the first ever CAD plugin interface for THERM, which has been in demand since the first release of LBNL THERM several years ago. The export workflow involves the drawing of window/wall construction details in Rhino and the assigning of materials and boundary conditions in Grasshopper to produce ready-to-simulate THERM files that allow you to bypass the limited drawing interface of THERM completely. Additional components in the “11 | THERM” tab allow you to import the results of THERM simulations back into Grasshopper and assist with incorporating THERM results into Honeybee EnergyPlus simulations. Finally, two components assist with a connection to LBNL WINDOW for advanced modeling of Glazing constructions. Example files illustrating many of the capabilities of the new components can be found in there links.
THERM_Export_Workflow, THERM_Comparison_of_Stud_Wall_Constructions
Analyze_THERM_Results, Thermal_Bridging_with_THERM_and_EnergyPlus
Import_Glazing_System_from_LBNL_WINDOW, Import_LBNL_WINDOW_Glazing_Assembly_for_EnergyPlus
It is recommended that those who are using these THERM components for the first time begin by exploring this example file.
Tutorial videos on how to use the components will be posted soon. A great deal of thanks is due to the LBNL team that was responsive to questions at the start of the development and special thanks goes to Payette Architects, which allowed Chris Mackey (the author of the components) a significant amount of paid time to develop them.
2 - Electrical Lighting Components with Enhanced Capabilities for Importing and Manipulating IES Files
Thanks to the efforts of Sarith Subramaniam, it is now much easier and more flexible to include electric lighting in Honeybee Radiance simulations. A series of very exciting images and videos can be found in his release post.
You can find the components under WIP tab. Sarith is looking for feedback and wishes. Please give them a try and let him know your thoughts. Several example files showing how to use the components can be found here. 1, 2, 3.
3- Expanded Dynamic Shade Capabilities
After great demand, it is now possible to assign several different types of control strategies for interior blinds and shades for EnergyPlus simulations. Control thresholds range from zone temperature, to zone cooling load, to radiation on windows, to many combinations of these variables. The new component also features the ability to run EnergyPlus simulations with electrochromic glazing. An example file showing many of the new capabilities can be found here.
Dragonfly Beta
In order to link the capabilities of Ladybug + Honeybee to a wider range of climatic data sets and analytical tools, a new insect has been initiated under the name of Dragonfly. While the Dragonfly components are not included with the download of this release, the most recent version can be downloaded here. An example file showing how to use Dragonfly to warp EPW data to account for urban heat island effect can also be found here. By the next release, the capabilities of Dragonfly should be robust enough for it to fly on its own. Additional features that will be implemented in the next few months include importing thermal satellite image data to Rhino/GH as well as the ability to warp EPW files to account for climate change projections. Anyone interested in testing out the new insect should feel free to contact Chris Mackey.
And finally, it is with great pleasure that we welcome Sarith and Antonello to the team. As mentioned in the above release notes, Sarith has added a robust implementation for electric light modeling with Honeybee and Antonello has added a component to calculate wet bulb temperature while providing stellar support to a number of people here on the GH forum.
As always let us know your comments and suggestions.
Enjoy!
Ladybug+Honeybee development team
PS: Special thanks to Chris for writing most of the release notes!…
s para acercarse al diseño paramétrico.
El curso esta dirigido a arquitectos diseñadores e ingenieros de diseño que pretendan implementar las técnicas del modelado por parámetros dentro de sus herramientas de proyectación.
La duración de dicho curso es de 20 horas, repartidas en 6 sesiones los días lunes y miércoles de 5pm a 8:20pm, en el espacio cultural calle nueve (calle 9 # 43b-75 abajo del parque del Poblado. https://www.facebook.com/calle.nueve). El curso dará inicio el día lunes 22 de Agosto de 2011. El máximo de inscritos por curso es de 15 personas para garantizar la calidad de la enseñanza.
Este curso estará dictado por los arquitectos Ana Maria Bustamante Y David Vanegas arquitectos de la oficina de arquitectura interior137 (www.interior137.blogspot.com) que cuentan con más de dos años de experiencia en el manejo de GRASSHOPPER, y tienen una trayectoria reconocida como docentes en la Facultad de Arquitectura de la U.P.B.
Para participar en el taller los estudiantes deberán tener un computador portátil para su uso personal, durante todo el curso, además deben tener instalado el software Rhino versión 4.0 con la actualización SR9, y un conocimiento mínimo del modelado y la interfaz de este software.
Contenidos:
Sesión 1: * Introducción al modelado por parámetros y al diseño mediante algoritmos.
* Grasshopper: datos + acciones. Interface.
Sesión 2: * Datos fijos, datos variables: Parámetros.
* Puntos, Curvas parametrizables.
* Transformaciones: Mover, Rotar.
Sesión 3: * Datos múltiples (listas): Series. Rangos.
* Funciones de 1 y 2 variables.
Sesión 4: * Gestiones de datos en listas: seleccionar items, ordenarlos, desordenarlos, eliminarlos.
Sesión 5: * Atractores.
Sesión 6: * Superficies: creación de superficies, panelizaciones.
Informes e inscripciones:
Para inscribirse en el curso deberá reservar su cupo abonando el costo total del curso al menos hasta el miércoles 17 de Agosto. Este valor se devolverá totalmente únicamente en caso de cancelación del curso.
Para mayor información, póngase en contacto a través del correo electrónico interior137@gmail.com asunto: CURSO GH…
io, alle ore 19:30 presso la Mediateca MARTE di Cava de’ Tirreni (Sa), la lecture magistralis dell’arch. Walter Nicolino dal titolo “Augmented visions / Responsive spaces”, un viaggio culturale che, attraversando gli studi progettuali a diverse scale condotti tra la sede torinese e il centro ricerca di Boston, mette in luce una attitudine nell’indagare e nel dar forma alle interazioni tra le persone, gli oggetti e gli spazi, al fine di fornire possibili risposte alle nuove istanze poste dalla rivoluzione digitale.
In apertura i saluti istituzionali del sindaco Marco Galdi, mentre a introdurre la lecture l’arch. Amleto Picerno, promotore del Mediterranean FabLab di Cava de’ Tirreni e tutor della Summer School digitalMed, il laboratorio progettuale che da quattro anni a questa parte, indaga temi, pratiche e tecniche dell’attuale panorama architettonico internazionale. È la smart city al centro della IV edizione di Summer School Digitalmed 2013, che si svolge a Salerno dal 22 al 28 luglio con l’obiettivo di creare un sistema di relazioni e di interazioni continue tra la città, le persone e l’ambiente in cui queste si rapportano in un continuo scambio di informazioni.
Ad esprimere la critic ai prototipi di progetto che emergeranno dal workshop digitalMed, sarà proprio Walter Nicolino, architetto di spicco del panorama italiano, coinvolto in numerosi progetti di ricerca al Senseable City Lab del MIT di Boston, insieme all’arch. Carlo Ratti con cui è fondatore e socio dello studio torinese CARLORATTIASSOCIATI.
Il 26 luglio lo space 1.0 della Mediateca MARTE di Cava de’ Tirreni si fa, dunque, arena d’avanguardia per un interessante dibattito durante il quale, a proposito della Summer School digitalMed, si ragionerà anche sul modo in cui le tecnologie digitali influenzano l’architettura.
«Da qualche tempo a questa parte possiamo scegliere se orientarci alla perfezione tramite navigatori GPS o perderci come sognanti flâneur metropolitani; possiamo associare in un batter d'occhio infiniti layers di dati a un luogo, oppure contemplarne in silenzio il paesaggio; possiamo anticipare la realtà con sofisticate rappresentazioni virtuali, oppure esercitarci in giocose autocostruzioni partecipate.
Possiamo avere l'una e l'altra cosa: non si tratta di una scelta tra il mondo reale e quello virtuale, come predetto da parte della letteratura agli albori dell’era digitale, ma si tratta di capire come il nostro ambiente costruito e gli spazi in cui viviamo stiano imparando a parlare un nuovo linguaggio e ad interagire in modo sempre maggiore con le persone - afferma Walter Nicolino che parafrasando Le Corbusier “La civilisation digitale cherche et trouvera son expression architecturale”, sottolinea l’importanza di integrare le nuove tecnologie e radici locali senza perdere la visione e la dimensione umana della città: All’architettura è richiesta una revisione dei propri strumenti per creare spazi flessibili, inclusivi, in grado di adattarsi ai nuovi modi di vivere e lavorare e di rispondere in modo interattivo alle nostre esigenze».
…
diseño computacional.
La Visiting School digitalMed 2014, promovida por Medaarch y Emwesoft Sevilla S.L.N.E, se celebrará en la ciudad de Sevilla, y tendrá como tema central la Smart City y el estudio de la interacción entre las personas y su entorno a través de objetos, dispositivos e infraestructuras.
Fecha limite de inscripción: 16/01/2014
info@emwesoft.com
OBJECTIVOS Adquirir la capacidad de gestionar flujos de datos en los que las ciudades están sumergidas, para insertar proyectos que sean útiles, contextualizados, poco invasivos y aptos a establecer un intercambio de informaciones con los usuarios.
El objetivo final es redactar un catálogo de proyectos que puedan formar parte de un contexto urbano y puedan delinear el perfil de las ciudades en las que viviremos en el futuro próximo.
METODOLOGÍA Metodología basada en el aprendizaje activo, en la puesta en práctica de métodos activos que estimulan y facilitan el intercambio de experiencias y puntos de vista entre el alumnado: Buscando la participación del alumno, planteando todas las cuestiones que considere necesarias a la hora de aclarar conceptos.
Fomentando el debate y la colaboración entre los participantes.
Dando respuesta a las dudas planteadas.
La metodología será presencial, lo cual permite un mayor acercamiento entre profesor y alumno, y en consecuencia una mayor asimilación de los conceptos.
PROGRAMA Los primeros días del taller serán dedicados a establecer definiciones comunes que nos permitan trabajar a partir de significados compartidos. En esta fase se tratarán temáticas que recurren a menudo en la práctica arquitectónica contemporánea, es decir el diseño computacional, la fabricación digital y los data driven. Los alumnos tendrán la posibilidad de aprender a usar software para el diseño paramétrico, como Rhinoceros y el plug-in Grasshopper, a través del conocimiento de dichos software, el alumno conseguirá competencias teóricas y técnicas, para un enfoque al diseño computacional.
PROFESORADO La formación será impartida por profesionales con amplio conocimiento y experiencia en el ámbito. Los tutores serán los arquitectos Amleto Picerno Ceraso y Francesca Viglione.
DURACIÓN TOTAL DEL TALLER
40 horas
QUIÉN PUEDE PARTICIPAR?
. Funcionarios con una actitud proactiva hacia la construcción de ciudades inteligentes;
. Académicos y estudiantes en áreas relacionadas con el desarrollo de proyectos y soluciones tecnológicas para ciudades digitales y ciudades inteligentes;
. Arquitectos;
. Ingenieros;
. Diseñadores;
. Profesionales de las tecnologías de información y con relación a el área de tecnología.
REQUISITOS BÁSICOS
- Conocimiento básico de Rhinoceros
- Inglés medio
*Disponibilidad de un intérprete español.
PRECIO y Tarifa especial
El cuesto del taller es de 500€.
También hay facilitacióno en caso de Inscripciones de grupo: para cada grupo formado por 5 inscriptos, que paguen en un única solución, el costo total será de 4 miembros y no 5 (una persona gratis)
DONDE
Emwesoft Sevilla S.L.N.E C/ Monte Carmelo 21, 41011 – Sevilla (España)
Teléfono: +34 (955) 224 524
Email: info@emwesoft.com
Internet: www.emwesoft.com …
300895
FB: https://www.facebook.com/ChidoStudio
FB: https://www.facebook.com/WEDOTdesign
Detalles:
Instructores:
Arturo de La Fuente (Chido Studio Argentina)
Eliana Monaco (Chido Studio Argentina)
Luis de La Parra (Chido Studio Mexico)
WS ROSARIO
Lugar:
DOSCASAS
ROSARIO: Sarmiento 1232 Planta Alta (2000 Rosario)
Fechas:
Viernes 16 de Mayo 2014 – 11:00 – 19:00 hs
Sábado 17 de Mayo 2014 – 11:00 – 19:00 hs
Domingo 18 de Mayo 2014 – 11:00 – 19:00 hs.
WS BUENOS AIRES
Lugar:
GARAGELAB
BsAs: Roseti 1380 CABA
Fechas:
Jueves 22 de Mayo 2014 – 18:00 – 21:00 hs
Viernes 23 de Mayo 2014 – 18:00 – 21:00 hs
Sábado 24 de Mayo 2014 – 11:00 – 20:00 hs.
Domingo 25 de Mayo 2014 – 11:00 – 20:00 hs
Importante:
Todos los niveles de experiencia son bienvenidos el único requisito es tener un entendimiento básico de los programas CAD y una actitud positiva hacia el aprendizaje de dichas herramientas. Necesitas llevar una laptop, nosotros te instalamos los programas de prueba.
Si planeas venir de fuera de la ciudad avísanos y te pondremos en contacto con otras personas que también vayan a hacerlo para en caso de desearlo puedan compartir su lugar de estancia.
Al participar en el workshop obtienes el 50 % de descuento en la licencia educacional Rhinoceros por medio de Rhino Chile.
COSTOS:
Profesionales: $1600
Estudiantes: $1400
Si ya realizaste algún Workshop de Chidostudio tenes un 20% descuento en esta inscripción.
Si venis en grupo con 2 amigos más cada uno tiene un %20 de descuento.
Proceso de Inscripción:
El participante deberá un mail a bsas@chidostudio.com donde se le enviará el procedimiento y medios de pago.
El depósito mínimo para reservar la matrícula es del 50% el resto deberá ser cubierto el día del evento.
Una vez que el depósito se haya llevado a cabo el participante deberá enviar a este correobsas@chidostudio.com los siguientes datos:
Nombre completo
Email
Teléfono
Institución educativa u Oficina
Archivo adjunto del recibo del depósito bancario
En cuanto recibamos la información immediatamente nos pondremos en contacto para especificar los pasos a seguir.
Contacto:
Arturo de La Fuente
bsas@chidostudio.com
Tel: (+54) 11-57268799
…
R_HOST=tcp://192.168.99.100:2376&SET DOCKER_CERT_PATH=C:\Users\akiwya\.docker\machine\machines\default&SET DOCKER_MACHINE_NAME=default&docker exec -i 4c9bb2f7444b pgrep snappyHexMesh SET DOCKER_TLS_VERIFY=1&SET DOCKER_HOST=tcp://192.168.99.100:2376&SET DOCKER_CERT_PATH=C:\Users\akiwya\.docker\machine\machines\default&SET DOCKER_MACHINE_NAME=default&docker exec -i 4c9bb2f7444b pgrep snappyHexMesh SET DOCKER_TLS_VERIFY=1&SET DOCKER_HOST=tcp://192.168.99.100:2376&SET DOCKER_CERT_PATH=C:\Users\akiwya\.docker\machine\machines\default&SET DOCKER_MACHINE_NAME=default&docker exec -i 4c9bb2f7444b pgrep snappyHexMesh SET DOCKER_TLS_VERIFY=1&SET DOCKER_HOST=tcp://192.168.99.100:2376&SET DOCKER_CERT_PATH=C:\Users\akiwya\.docker\machine\machines\default&SET DOCKER_MACHINE_NAME=default&docker exec -i 4c9bb2f7444b pgrep snappyHexMesh SET DOCKER_TLS_VERIFY=1&SET DOCKER_HOST=tcp://192.168.99.100:2376&SET DOCKER_CERT_PATH=C:\Users\akiwya\.docker\machine\machines\default&SET DOCKER_MACHINE_NAME=default&docker exec -i 4c9bb2f7444b pgrep snappyHexMesh SET DOCKER_TLS_VERIFY=1&SET DOCKER_HOST=tcp://192.168.99.100:2376&SET DOCKER_CERT_PATH=C:\Users\akiwya\.docker\machine\machines\default&SET DOCKER_MACHINE_NAME=default&docker exec -i 4c9bb2f7444b pgrep snappyHexMesh Butterfly is running blockMesh. PID: 1837 SET DOCKER_TLS_VERIFY=1&SET DOCKER_HOST=tcp://192.168.99.100:2376&SET DOCKER_CERT_PATH=C:\Users\akiwya\.docker\machine\machines\default&SET DOCKER_MACHINE_NAME=default&docker exec -i 4c9bb2f7444b pgrep snappyHexMesh
/*---------------------------------------------------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: v1612+ | | \\ / A nd | Web: www.OpenFOAM.com | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ Build : v1612+ Exec : blockMesh Date : May 22 2017 Time : 08:51:50 Host : "default" PID : 1837 Case : /home/ofuser/workingDir/butterfly/outdoor_airflow nProcs : 1 sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE). fileModificationChecking : Monitoring run-time modified files using timeStampMaster (fileModificationSkew 10) allowSystemOperations : Allowing user-supplied system call operations
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // Create time
Creating block mesh from "/home/ofuser/workingDir/butterfly/outdoor_airflow/system/blockMeshDict" Creating block edges No non-planar block faces defined Creating topology blocks Creating topology patches
Creating block mesh topology
Check topology
Basic statistics Number of internal faces : 0 Number of boundary faces : 6 Number of defined boundary faces : 6 Number of undefined boundary faces : 0 Checking patch -> block consistency
Creating block offsets Creating merge list .
Creating polyMesh from blockMesh Creating patches Creating cells new cannot satisfy memory request. This does not necessarily mean you have run out of virtual memory. It could be due to a stack violation caused by e.g. bad use of pointers or an out of date shared library Runtime error (PythonException):
Butterfly failed to run OpenFOAM command! new cannot satisfy memory request. This does not necessarily mean you have run out of virtual memory. It could be due to a stack violation caused by e.g. bad use of pointers or an out of date shared library Traceback: line 51, in script
I don't really have any knowledge in CFD simulation and only watched the tutorials and managed to get the sample files to work. So this time, I replaced the starting geometry my building which is a curve building, I wonder if that is the issue that caused this problem. Can anyone enlighten me on the issue?
Warm regards,
Annie…
t defined from the discussion of radiation exchange between urban surfaces and the sky in urban heat island research (See Oke's literature list below). It will be affected by the proportion of sky visible from a given calculation point on a surface (vertical or horizontal) as a result of the obstruction of urban geometry, but it is not entirely associated with the solid angle subtended by the visible sky patch/patches.
So, I think using "geometry way" to approximate Sky View Factor is not correct. Sky View Factor calculation shall be based on the first principle defining the concept: radiation exchange between urban surface and sky hemisphere:
(image extracted from Johnson, G. T., & Watson, 1984)
Therefore, I always refer to the following "theoretical" Sky View Factors calculated at the centre of an infinitely long street canyon with different Height-to-width ratios in Oke's original paper (1981) as the ultimate benchmark to validate different methods to calculate SVF:
So, I agree with Compagnon (2004) on the method he used to calculate SVF: a simple radiation (or illuminance) simulation using a uniform sky.
The following images are the results of the workflow I built in the procedural modeling software Houdini (using its python library) according to this principle by calling Radiance to do the simulation and calculation, and the SVF values calculated for different canyon H/W ratios (shown at the bottom of each image) are very close to the values shown in Oke's paper.
H/W=0.25, SVF=0.895
H/W=1, SVF=0.447
H/W=2, SVF=0.246
It seems that the Sky View Factor calculated from the viewAnalysis component in Ladybug is not aligned with Oke's result for a given H/W ration: (GH file attached)
According to the definition shown in this component, I assume the value calculated is the percentage of visible sky which is a geometric calculation (shooting evenly distributed rays from sensor point to the sky and calculate the ratio of rays not blocked by urban geometry?), i.e solid angle subtended by visible sky patches, and it is not aligned with the original radiation exchange definition of Sky View Factor.
I'd suggest to call this geometrically calculated ratio of visible sky "Sky Exposure Factor" which is "true" to its definition and way of calculation (see the paper on Sky Exposure Factor below) so as to avoid confusion with "The Sky View Factor based on radiation exchange" as discussed in urban climate literature.
Appreciate your comments and advice!
References:
SVF: definition based on first principle
Oke, T. R. (1981). Canyon geometry and the nocturnal urban heat island: comparison of scale model and field observations. Journal of Climatology, 1(3), 237-254.
Oke, T. R. (1987). Boundary layer climates (2nd ed.). London ; New York: Methuen.
Johnson, G. T., & Watson, I. D. (1984). The Determination of View-Factors in Urban Canyons. Journal of American Meteorological Society, 23, 329-335.
Watson, I. D., & Johnson, G. T. (1987). Graphical estimation of sky view-factors in urban environments. INTERNATIONAL JOURNAL OF CLIMATOLOGY, 7(2), 193-197. doi: 10.1002/joc.3370070210
Papers on SVF calculation:
Brown, M. J., Grimmond, S., & Ratti, C. (2001). Comparison of Methodologies for Computing Sky View Factor in Urban Environments. Los Alamos, New Mexico, USA: Los Alamos National Laboratory.
SVF calculation based on first principle:
Compagnon, R. (2004). Solar and daylight availability in the urban fabric. Energy and Buildings, 36(4), 321-328.
paper on Sky Exposure Factor:
Zhang, J., Heng, C. K., Malone-Lee, L. C., Hii, D. J. C., Janssen, P., Leung, K. S., & Tan, B. K. (2012). Evaluating environmental implications of density: A comparative case study on the relationship between density, urban block typology and sky exposure. Automation in Construction, 22, 90-101. doi: 10.1016/j.autcon.2011.06.011
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Added by Shane Burger at 11:21pm on February 12, 2012