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2D Flow over a circular cylinder

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Old   February 16, 2004, 12:26
Default 2D Flow over a circular cylinder
  #1
Jonathan
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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
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Old   February 17, 2004, 15:55
Default Re: 2D Flow over a circular cylinder
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Tim P.
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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.
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Old   February 18, 2004, 14:16
Default Re: 2D Flow over a circular cylinder
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STK
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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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