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Old   September 2, 2006, 05:04
Default CFD basics
  #1
Paweł
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Hello, i'm trying to understand CFD on basis of finite volume method. At the moment I have few questions.

1. To get temperature and velocity values over the model (fluid), I have to solve both Navier-Stokes (N-S) and Mass-energy (M-E) equations. N-S is needed to get velocity values, A M-E to get temperature values. Am I right or wrong?

2. If i'm right in 1, do those (N-S, M-E) equations are solved separately or together?

Thanx for your help
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Old   September 2, 2006, 06:23
Default Re: CFD basics
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ganesh
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Dear Pawel,

I suppose by the NS you refer to the momentum equations and by ME to the continuity and energy equations. In FVM, the entire system of equations is a non-linear coupled system for compressible flows. The system gets decoupled in the case of incompressible flows, leaving no equation for pressure update, and hence a pressure correction scheme is introduced. You can read up more details in several books.

Regards,

Ganesh
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Old   September 2, 2006, 07:31
Default Re: CFD basics
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Paweł
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Thanks,

Can you recommend me any information in the Internet?

I think I understand general idea of this method, but i cant find the details

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Old   September 2, 2006, 08:17
Default Re: CFD basics
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Siddharth
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Dear Ganesh,

If i am correct, even for incompressible flows, momentum and mass equations can't be solved 100% independently. Pressure correction scheme is used jointly with momentum and mass conservation equation to get parameters throughout the calculation domain.

Regards,

Sidd
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Old   September 2, 2006, 08:59
Default Re: CFD basics
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Ejazkd
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http://www.flow3d.com/Cfd-101/cfd101.htm
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Old   September 3, 2006, 03:31
Default Re: CFD basics
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Paweł
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Thanks
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Old   September 4, 2006, 09:03
Default Re: CFD basics
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Vincent
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http://www.navier-stokes.net/
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