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Old   March 17, 2003, 08:18
Default Opinion on Powerflow
  #1
a CFD user with some Powerflow experience
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Let's have some lively debate in CFD:-

I'd like to post the following statement:-

Powerflow is rubbish

Could you please give your opinion on this.
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Old   March 17, 2003, 09:20
Default Re: Opinion on Powerflow
  #2
Steve Amphlett
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I hardly think you're going to get any sensible debate by staying anonymous, whilst slagging off a product.

How about: Hi, I work for ABC doing XYZ. I use a commercial product (called Powerflow) that I don't like for the following reasons....
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Old   March 17, 2003, 09:51
Default Re: Opinion on Powerflow
  #3
andy
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Can I check that Powerflow is the Lattice Boltzman method marketed by Exa? (www.exa.com prints the following in my browser "Ir4dex g0t Ya! bY MENDIGO" which, I guess, is the downside of the internet).

Quite a few years ago now I saw some decent predictions for the flow over ground vehicles which were superior to equivalent RANS predictions (although probably about equivalent to decent LES predictions). EXA was not forthcoming about how they were simulating near wall effects which may be OK in (some) industries running the package as a black box but is substantial problem in a research environment. I dropped my interest but a couple of months ago someone here working with Lattice Boltzman methods (different flavour to EXAs) said they were now helpful and informative about their methods.

Given adequate resolution, I would be curious about how powerflow would perform poorly. Can you, briefly, describe the problems you have studied and what went wrong?

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Old   March 18, 2003, 21:03
Default Re: Opinion on Powerflow
  #4
Jen
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Hi, did you get the singular results in PowerFlow that is what I guess.
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Old   March 19, 2003, 08:20
Default Re: Opinion on Powerflow
  #5
Free_and_SIMPLE
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1. Your posting is rubbish.

2. Have a look at the ICASE Report 2000-40 :

D. P. Lockard, L.-S. Luo, and B. A. Singer, Evaluation of the lattice-Boltzmann equation solver PowerFLOW for aerodynamic applications

3. My personal experience is, that the support from EXA is very bad (I only know it for Europe, maybe its better is the US). I know that BMW is using Powerflow (of course not very extensively) and they are satisfied with the results (whatever satisfied should mean in this context). IMHO the main problem of Powerflow are the RAM and computing requirements.

Resumee : Good idea, bad marketing, ????? product.

F&S
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Old   April 15, 2003, 19:37
Default Re: Opinion on Powerflow
  #6
ahmad samirani
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I'm studying mechanical eng. I'm looking for a SIMPLE method example . would u like please send me an ex. with it's source code?

thanks
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Old   April 17, 2003, 06:18
Default Re: Opinion on Powerflow
  #7
Manosh
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Dear ahmad

People burn lots of body fuel to build up bunch of source codes like SIMPLE method. In the same way you have to make source codes yourself. I dont think you will get source codes from somewhere else except your supervisor! You can ask for some helps from people where you faced problems.

Can you get source codes from STAR-CD, FLUENT ect!! You can't.

Manosh
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