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-   -   2D Flow over a circular cylinder (http://www.cfd-online.com/Forums/fluent/33046-2d-flow-over-circular-cylinder.html)

Jonathan February 16, 2004 12:26

2D Flow over a circular cylinder
 
Hello all,

Does anyone have experience with the classic problem of 2D flow over a circular cylinder?

How do you create a proper non-reflecting boundary conditions?

Our solution for pressure looks very wrong. Does anyone have any experience here?

Jonathan

Tim P. February 17, 2004 15:55

Re: 2D Flow over a circular cylinder
 
I have never performed this problem in FLUENT, but at one time I had printed off some of the validation studies that FLUENT did on it's own code. One of these was on Laminar Flow Around a Circular Cylinder (Re = 20, 40, 100). It must have come from a seperate folder on the original documentation disc that came with FLUENT (5.0), as I can't find it in with the regular user documentation manual that I have access too.

As for the non-reflecting boundary conditions, you could try having all of you external boundaries be inlets and outlets, but you wouldn't necessarily have standard shaped domain.

Cheers, Tim.

STK February 18, 2004 14:16

Re: 2D Flow over a circular cylinder
 
I HAVE STUDIED INVISCID FLOW OVER A CYLINDER WITH A CLASSIC 2-D QUADRILATERAL DOMAIN (TWO WALLS INLET AND OUTLET ) WITH FAR-FIELD BOUNDARY CONDITIONS.I DIDN;T HAVE ANY PROBLEM WITH MY RESULTS.BUT YOU HAVE TO KNOW THAT FULL INDEPENDENCY OF MESH WAS SUCCEED AT ABOUT 700.000 TRIANGULAR CELLS (EXACT SOLUTION).

I DON'T UNDERSTAND YOUR PHRASE:NON REFLECTING BOUNDARIES? YOU MEAN NO-SHAPED DOMAIN?


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