[famon]

Hi to all.
I know my problem might be repetitive sorry
My problem reffers to CFD, Is there any Article which describes scheme in Pressure base e.g (Simple, simple C, Piso, Coupled, Quick, Power low and ...)?
and thir limitation
I will be grateful for your kind helps

[CeesH]

Hello Farzad,

You are mixing some discretization schemes and pressure-velocity coupling schemes here, which are different things. Anyway, there are certainly some references for that.

For a background, pretty much any CFD book will do. I've used Versteeg and Malalasekara (bit old, but all is in there) and Hanjalic et al. (might be a bit more difficult to get outside of the Netherlands though), both extensively discuss both discretization schemes and pressure-velocity coupling in terms of the underlying math and ideas.
When it comes to comparing the performance of the schemes, many, many journal articles do that for a wide range of geometries and flow conditions; which scheme is the best choice depends somewhat on the conditions which you are using. In discretization schemes, the accuracy certainly depends on the scheme used (in general, lower order schemes are less accurate, but often more stable and less time consuming); in pressure-velocity coupling, it is mostly the runtime that is affected between schemes - and depending on the details of your simulation picking a different scheme may matter a lot, or hardly anyting.

[famon]

Hello cees
Thanks for your kind guides, My main problem is mixing the discreetization, now downloaded Versteeg and Malalasekara and looked for discretization in finite volume section, I looked several CFD references too, but they all talk by formules, I need article to compare them, and giving the differences of them in Fluent use.
should I study finite element discreetization as basic for finite volume or they are not sequences?

Thanks alot

[LuckyTran]

The choice between SIMPLE, PISO, and COUPLED is largely determined by how quickly each scheme converges for a given computational cost (# of iterations). Information on each scheme is obscure for P-V coupling.

There is plenty of detailed information floating around for discretization schemes. CFD wiki, vanilla Wikipedia, and Fluent manuals provide tons of relevant information.

Originally Posted by famon

should I study finite element discreetization as basic for finite volume or they are not sequences?

I recommend completely ignoring finite element. The philosophies of the two techniques are vastly different even for similar problems. For starters, the quantities being discretized are totally different quantities. FEM could help you understand FVM better in the sense that understanding what an apple is might help you get to know oranges better.

[famon]

Originally Posted by LuckyTran

The choice between SIMPLE, PISO, and COUPLED is largely determined by how quickly each scheme converges for a given computational cost (# of iterations). Information on each scheme is obscure for P-V coupling.

There is plenty of detailed information floating around for discretization schemes. CFD wiki, vanilla Wikipedia, and Fluent manuals provide tons of relevant information.



I recommend completely ignoring finite element. The philosophies of the two techniques are vastly different even for similar problems. For starters, the quantities being discretized are totally different quantities. FEM could help you understand FVM better in the sense that understanding what an apple is might help you get to know oranges better.

Thanks for kind helps, really useful information