'Best' algorithm for CFD on unstructured 2d grids?

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 August 14, 2008, 17:13 'Best' algorithm for CFD on unstructured 2d grids? #1 andy2o Guest   Posts: n/a Dear All, I have used CFX and other commercial codes, and have a good background in scientific programming. Now, mainly for my own interest and education, I wish to develop my own (toy) code for 2-d CFD on an unstructured grid. I hope to implement k-epsilon and maybe k-omega models within this code.... So my question is: 1) Do you know of a good, robust algorithm for simulating turbulent flow on an unstructured 2-d grid? 2) Can you point me towards a good reference which describes it?! One that gives enough detail to replicate the method if possible? I would prefer to work with an algorithm using collocated variables (pressure and velocity at same nodes) but I am open minded and can be convinced otherwise by good evidence. All references would be very welcome - but I would particularly welcome information about algorithms that are well-proven and general purpose, even if they are not state-of-the-art. Very many thanks for your help. Best regards, andy2o

 August 15, 2008, 01:11 Re: 'Best' algorithm for CFD on unstructured 2d gr #2 Harish Guest   Posts: n/a Why would you want to do turbulent flow in 2d ? There are so many source codes available. You can also browse through the cfd-wiki for a list of codes available for free and then decide on how you want to structure your code. You cannot take a turbulence model for example and say its general purpose since all the numerical models have their pros and cons. The better option would be to decide the application that you have in mind and have a look at what kind of CFD codes have been used to analyze the problem.

 August 18, 2008, 20:43 Re: 'Best' algorithm for CFD on unstructured 2d gr #4 about implementations Guest   Posts: n/a i could tell you that i understand most of implementation details of navier stokes and turbulence. And the reason i understand it is i follow closely documentations of following three solvers: Fluent, CFX and StarCCM+. the best that you can read is starCCM+ manual, it tells you in detail how the things are implemented. No need to write solvers to do it. Just go through it. (Beware the starting version's manual had lots of typos in it, some of them are improved in new version, but you might encounter them).

 August 19, 2008, 00:27 Re: 'Best' algorithm for CFD on unstructured 2d gr #5 Praveen. C Guest   Posts: n/a Take a look at the book of Blazek. It has lot of practical details. Look at the notes of Tim Barth of NASA. You will find them on his website. You can also look at the manuals of some CFD codes like NSC2KE and Typhon.

 August 19, 2008, 12:43 Re: 'Best' algorithm for CFD on unstructured 2d gr #6 andy2O Guest   Posts: n/a Thanks for your reply. The Star CCM+ manual sound good - I'll see if I can get access to them, but it seems quite unlikely. Regards, andy2o

 August 19, 2008, 12:50 Re: 'Best' algorithm for CFD on unstructured 2d gr #7 andy2O Guest   Posts: n/a Many thanks. The NSC2KE code has some good information, and I will look for that book by Blazek (it's not cheap on Amazon though!) - I miss having a university library for this sort of thing... regards, andy2o

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