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-   -   which is best?FV,FM,FD,Sp methods (https://www.cfd-online.com/Forums/main/5591-best-fv-fm-fd-sp-methods.html)

prasat December 28, 2002 06:24
which is best?FV,FM,FD,Sp methods
 
Which method is the best for cfd applications finite volume,finite difference or spectral methods or finite element. Prasat

Manish December 28, 2002 06:44
Re: which is best?FV,FM,FD,Sp methods
 
hi, According to my study so far, i think FV, method is better then all other for FEM, it is better for diffusion dominating problem, not that good for convecion. Although one can use FD, which give trunction error also, but it is not that flexible, and more over a mathematical nature. FV is better, most of the commercialy available software also use this method, also generaly we use same method for derivation of our flow equation..more close to fluid flow and heat transfer. So. I will suggest for FV. Look for other people what they say. bye

Santa Clause December 28, 2002 22:59
Re: which is best?FV,FM,FD,Sp methods
 
See previous discussion:

www.cfd-online.com/Forum/main_archive_2001.cgi?read=18678

Linfeng BI December 29, 2002 07:47
Re: which is best?FV,FM,FD,Sp methods
 
It depends.

Each method has its own advantage. If high accuracy in simple geometry is required, Sp and FD may be the best choice. On the other hand, for complex geometry FV and FE are more convenient.

Abhi December 29, 2002 12:42
Re: which is best?FV,FM,FD,Sp methods
 
I will say definitely most popular is FVM.

satyan January 3, 2003 08:49
Re: which is best?FV,FM,FD,Sp methods
 
Hi Friends, According to my view FV is the best method because of its basic principle of Conservation of flow properties.it is most accurate in terms of defining the physics of flow. Where as FEM fails in case of supersonic flows where there is discontinuity of the derivative(sudden change of flow properties). Also ,FD becomes very difficult when the geometry is complex due to lots of transformation involved from orthogonal to cartesian and again to orthogonal.Although programming for FD is the simplest.

Mayank Tyagi January 3, 2003 14:00
Re: which is best?FV,FM,FD,Sp methods
 
Please read the book by T.J. Chung on CFD....He has elaborated the details, differences and similarities of all these methods in an understandable fashion. He also presented a lot of applications with results.

MT

Manish January 10, 2003 02:05
Re: which is best?FV,FM,FD,Sp methods
 
hi sachu!!! nice to see you here its realy a cool place enjoy!!


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