st for the quality of the mesh.
Actually, convergence is much more than simply having low residuals. You can have a wrong solution with very low residuals. Usually, it is a combined process of both run time information on residuals and having an idea or expectation of what the simulation results should be. Another way of assessing convergence is if the residual values have been stable (within a very small limit, e.g. 1E-5) for more than a certain number of iterations (e.g. 1000). We are planning to provide run-time residual plots in Butterfly, hopefully soon. These plots can help keeping an eye on the solution.
You could try as a test if you want to switch to a blend of first and second order (by swapping upwind with linearUpwind in the fvSchemes)
.
Concerning mesh quality there are a number of ways, some of which are a bit advanced for this post and for BF's current capabilities. The best way to start is by refining the background mesh (i.e. the blockMesh). You can do that by assigning more cells to the x, y and z directions in the blockMesh component. However, make sure you increase the max global cells. I would suggest you monitor the output of the blockMesh in order to know the total number of cells there. Your max global cells has to be higher than that for SHM to even work. I'd suggest 2x to start with. Ofc all that requires a bit of trial and error depending on the case at hand.
Hope this helps!
Kind regards,
Theodore.…
have some spare time please fill in my 3D Printing Open Survey - If you could make almost anything, what would it be ? Updated results are publicly available after completing questionnaire (Please press "Wyślij" - Send button and "Wyniki ankiety" - Results button at the end). This survey will be used to evaluate demand for 3d printing services globally. It consist of 30 questions about: - open-source 3d printers - future of additive manufacturing - 3d printing services - ecology in 3d printing - copyright issues and 3d printing Three example questions: 2. Which of the following 3d printing applications is the most interesting? * - Things personalization - Printing food - Attempts to print structures resembles in functioning living tissues or blood vessels - Creating impossible or difficult to create by using conventional technology things - Printing rooms or buildings on earth/moon - Printing chemical compounds (for example drugs) - Using in renewable energy sources - Printing parts and/or mechanical vehicles 3 . Have you ever heard about cheap DIY 3D Printers (for example RepRap, PrintrBot, MakiBox A6) ? * DIY - Do It Yourself - Yes - No 4 . When 3D Printers will become one of the typical household appliances ? * - After 5 years - After 10 years - After 15 years - After 20 years or later - Never - I don't know Feel free to ask questions!…
assume we want to format two numbers, one integer and a floating point value. The integer represents an index and it should appear inside square brackets, then we want the floating point number rounded to a maximum of 4 decimal places (but always using at least one decimal place, even if it's zero), and then, in parentheses a scientific notation representation using 8 decimal digits of the number.
So, assuming the index is 16 and the value is 47.280006208, what we are after is:
[16] 47.28 (4.72800062E+001)
To make this work, we need a formatting pattern that looks like:
[{0}] {1:0.0###} ({1:E8})
The square brackets, spaces and parenthesis are just part of the output, they have no meaning whilst formatting. Everything inside the curly brackets though will be replaced with a specific formatting of one of the values.
When using the Format component as shown above, the formatting pattern is just text data. The component knows that it is supposed to use the Format() function using the pattern text and whatever additional data is provided.
When you invoke the Format() method in an expression, you do need to make sure that the pattern is actually text:
So here the pattern needs to be encased in double quotes, otherwise it will be treated as code, rather than text.
You cannot use the formatting method in the internal expression of a number parameter, because this method returns text, whereas the number parameter is only capable of storing numbers. Any expression that you put into a number parameter had better return numbers as a result.…
ort and export from the images below and also from the HELP file of DB in attachments (Page 71: Importing Geometric Data; Page 78-80: Import 3 - D CAD Data). In their HELP file, they mention about "import geometric data".
However, regarding the input of schedules, loads, constructions and etc., DB normally uses "Component " and "Template" (Page 29: Templates And Components; Page 591: Templates; Page 533: Components). "Templates" are databases of typical generic data, including Activity templates, Construction templates, Glazing templates, Facade templates, HVAC templates, Location Templates, and etc. "Component " are databases of individual data items (e.g. a construction type, material, window pane).
Both "Component " and "Template" are allowed to be imported and exported by using "Import / Export library data" command (.ddf format - DB Database File; Page 734: Import Components/Templates, Export Components/Templates). DB also allows us to build up our own libraries of templates and components (Page 731: Library Management; Page 733: Template Library Management).
In order to import both geometric information and other information related to schedules, loads, constructions and etc. from GH to BD, we supposed the following two ways:
1. GH(HB+GB) --> gbXML (both geometric and "Component " and "Template" information) --> DB
This is the way we most prefer. We did see information related to schedules, loads, constructions encoded in the gbXML file generated by GB, but still do not know the reason why DB did not take this information (I also mentioned this in Q6 within the gh file). We assume this might because the gbXML file we create encodes the schedules based on a different template / schema than the one DB expects. We also post this question to the DB forum for help.
(http://www.designbuilder.co.uk/component/option,com_forum/Itemid,25/page,viewtopic/p,13755/#13755)
2. GH(HB+GB) --> gbXML (geometric information only) + .ddf ("Component " and "Template" information only) --> DB
If the first way doesn't work and DB only takes geometric information from the gbXML, then we might think of the other way - generating the .ddf files from GH(HB+GB) to pass the schedule, load and construction information to DB.
I was wondering if it is feasible for HB and GB to have this function? And what is your suggestion to achieve this?
In addition, we notice that DB can export XML files (not gbXML), so we are trying to figure out if DB also accepts / reads the XML file. If so, we might be able to convert the gbXML (with both geometric and schedule information) to XML. What do you think about that?
Thank you again for all your help!
Best,
Ding
DB import
DB export
Template libraries
Component libraries
…
" (idiomatic) and easy way of doing things.So here come some basic questions:
Is there a way to create custom components by grouping an existing sub-network together? I'm looking for a way to re-use parts of a program (something similar to subroutines), and to make the network look less cluttered. I found that it is possible to group components (ctrl-g), but this still displays them as separate blocks (too much clutter), and provides no way to re-use a sub-network in such a way that if it is modified in one place, all it's instances (all the places where it is re-used) also get modified.
Is there a component that does nothing, just passes a signal through? Suppose I need to connect block A to blocks B1, B2, B3 (all three get the same input). Then I change my mind, and I decide to connect block C to these three, not A. In this case it will be necessary to change three connections, not just one. I'm looking for an easy way to do this by a single rewiring, not three. (This came up in a practical situation).
Finally, a related question: is there a component that acts as a switch, so I can choose which signal it passes through out of a possible set of choices? For example, suppose that a set of objects can be coloured based on a number of different properties (size, positions, rotation, etc.) I'm looking for a way to switch between these very easily, without the need to do much rewiring.
Thank you in advance for any replies / useful comments, even general ones on how to easily structure a large Grasshopper program/network.…
ating to new speakers.
For more information: https://medium.com/@carspeakerland/a-guide-to-the-simple-way-difference-in-car-speakers-2-way-3-way-4-way-25e0bf215b00
Adding new speakers for your automobile could improve the sound quality dramatically. Some sound technicians say it is the number-one update you may make to improve the overall quality of your vehicle.
"They do not care how it sounds. Speakers are often form of continue on the list. Updating to new speakers offers you a much fuller sound."
There is a whole lot to pick from in regards to car speakers. (Photo from Eldon Lindsay)
"New speakers will make a greater fidelity and clarity of sound," states Robert Nevitt, proprietor of Audio Electronics at Indianapolis. "The audio is more different without distortion. People will not get bored listening to it."
Cook says customers need to pick the type of sound they enjoy. The very first thing Cook does having a customer is sit in the car together to talk about their personal taste.
"Everybody's ear is different," he states. "That which I believe sounds great, you might believe is dreadful. It is a fantastic idea to get outside and listen to everything you enjoy and do not like about doing it."
When you've discovered a sound you want, you are going to discover the sky's actually the limitation in regards to purchasing car speakers. There are scores of manufactures and models, sizes and power levels to select from.
Columbus Car Audio & Accessories offers three types of automobile speakers to pick from: complete array speakers, component speakers along with coaxial speakers.
• Total range speakers arrive with a tweeter to make to your high-pitched sounds along with a woofer for those lows. This option offers a number of different sizes.
• Unit speakers, nonetheless, include separate tweeters and woofers.
• Coaxial speakers arrive with a tweeter plus motorist.
When you've selected a type of automobile speaker, you are going to want to determine how many you desire. Cook states some cars arrive with as little as just two speakers, whereas bigger, luxury vehicles might have too many 32. He adds a normal sedan generally has four. What are The Speaker Sizes in My Car | Speaker Size for My Car
"It simply depends if you would like to replace all of these," Cook says. "I would advise doing all of four. If you are budget-minded, I'd begin with the ones at the front. That is where you are at. And you are likely to be at the automobile 100 percent of their moment."
Subwoofers are designed to reproduce low bass frequencies also may be included with new speakers or could be added separately to existing car speakers.
"Many speakers can not play down low in these frequencies such as a subwoofer may," Cook says.
Related Article
Wondering about speakers? Below are a few techniques to establish a home entertainment experience whatever your budget.
A speaker update might charge as little as $100 up to a few million dollars depending on the scope of job and type of speaker.
Cook states that the price of a subwoofer can operate as low as $37. Columbus Car Audio & Accessories sells a subewoofer bundle that includes an amplifier and a enclosure for about $ 299.
To get a set of automobile speakers, Columbus Car Audio & Accessories begin prices at $39, with an average price tag of about $70 for setup. Adding an anti-vibrator into a set of speakers prices an additional $25.
Nevitt, meanwhile, fees as little as $99 to get a set of "some good speakers." The price of one hour of installion, that is typically how long it takes to put in a set of speakers, is 67.
However, most customers spend far more.
"Paying a total amount of 800 to $1000 isn't from this world of possibility," Nevitt states. "A price somewhere in the center could be $400 or $500."
Cook says several vehicle speaker technicians began with DIY projects and adds there is nothing wrong with trying to set up car speakers all on your own. But you are going to want the correct tools for your job along with just a little understand. Installing speakers requires carrying out your car door.
See Also: https://www.scoop.it/t/how-to-choose-best-car-speakers-6x9-inch-6-5-inch-6x8-inch-4-inch
Choosing a professional to set up speakers ensures that the job is done correctly.
"If you do it yourself, then you might wind up breaking something. That is some thing we do everyday. I am not planning to inform you we will not violate something. But we will look after it if we perform. We all do so with being honest and up front with people."
If you are getting speakers set up, experts say to expect to place an appointment to the setup. …
(twice the amount of lines, it'll take twice as long).
If you nest two loops you're iterating over each line, and then you iterate again over each line. So when you now have twice as many lines, it takes four times as long O(N*N) or O(N²)
With an octree you can reduce the second iteration from O(N) to O(log N). The reason octrees are fast is because they allow you to quickly reject large amounts of lines in your set. Lines are no longer stored in a list, but rather in recursive spatial buckets. If we determine that a certain bucket is too far away to possibly yield any valid results, we can instantly skip all the lines in that buckets and any sub-buckets. If you're lucky, you can reject ~85% of the local data in every iteration, which means even large collections of lines are reduced to only a few potential candidates very quickly.
Thinking about this I'm actually not sure now whether lookup in my Tree3d class is O(log N) or O(sqrt N), but the basic principle holds. The reason the resulting algorithm is O(N * log N) is because the outer loop is still O(N) but the inner loop is now replaced with an O(log N) searcher, so you end up with O(N) * O(log N) = O(N log N)
At least that's how I think it works, computational theory has never been my strong suit.
--
David Rutten
david@mcneel.com
Poprad, Slovakia…
Added by David Rutten at 4:55pm on November 29, 2012