# CFD basics

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 September 2, 2006, 05:04 CFD basics #1 Paweł Guest   Posts: n/a 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

 September 2, 2006, 06:23 Re: CFD basics #2 ganesh Guest   Posts: n/a 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

 September 2, 2006, 07:31 Re: CFD basics #3 Paweł Guest   Posts: n/a 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

 September 2, 2006, 08:17 Re: CFD basics #4 Siddharth Guest   Posts: n/a 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

 September 2, 2006, 08:59 Re: CFD basics #5 Ejazkd Guest   Posts: n/a

 September 3, 2006, 03:31 Re: CFD basics #6 Paweł Guest   Posts: n/a Thanks

 September 4, 2006, 09:03 Re: CFD basics #7 Vincent Guest   Posts: n/a

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