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-   -   flat plate boundary layer problem --great influence of viscosity (http://www.cfd-online.com/Forums/openfoam/79045-flat-plate-boundary-layer-problem-great-influence-viscosity.html)

waynezw0618 August 10, 2010 15:04

flat plate boundary layer problem --great influence of viscosity
 
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Dear everyone:

L.J.Jiang August 10, 2010 19:04

It seems that there is a convergence problem with this case, k and epsilon were not convergent finally(because the RelTol set is 0.1?). And are you sure the BC. of U on top patch is proper set to fixedValue ? Anyway, it's a interesting but strange case, hope someone give me a bright hint.

Best,
LJ

waynezw0618 August 11, 2010 07:25

.:confused:

waynezw0618 August 11, 2010 07:53

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:confused:

waynezw0618 August 11, 2010 13:46

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And also fine in CFX

waynezw0618 August 11, 2010 13:53

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Again the result of Fluent as before is not clear.

and it seems not the problem of turbulence model and wall function as i have turn off the turblence model by using laminar,This strange sensitive phenomenont will also happpened

thanks

su_junwei August 12, 2010 02:19

what is your numerical boundary condition for your up patch in the poor case? It seems that it is a fixed value. Have you tried zerogradient or sym boundary condition for this patch?

regards, Junwei


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