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-   -   bubbleFoam validation case (http://www.cfd-online.com/Forums/openfoam/79305-bubblefoam-validation-case.html)

balkrishna August 19, 2010 07:05

bubbleFoam validation case
 
I faced the following difficulty.
I switch off the dispersed phase volume fraction at inlet . That is inlet alpha = uniform 0 and also the dispersed phase velocity . I keep my continuous phase velocity Ub = 0.1 m/s . Continuous properties are rho = 1000 kg/m3 , nu = 1e-06 m2/s . This means now i am studying single phase flow . I compared the results to simpleFoam results and have found a problem with the velocity plots in the plane z=0.2 on the same timestep . Specifically on the line joining (0 0.5 0.2) and (1 0.5 0.2) . Can someone help me resolve this issue ....
My blockMeshDict is as follows :
Code:

/*--------------------------------*- C++ -*----------------------------------* \
| =========                |                                                |
| \\      /  F ield        | OpenFOAM: The Open Source CFD Toolbox          |
|  \\    /  O peration    | Version:  1.7.0                                |
|  \\  /    A nd          | Web:      www.OpenFOAM.com                      |
|    \\/    M anipulation  |                                                |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version    2.0;
    format      ascii;
    class      dictionary;
    object      blockMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

convertToMeters 1;

vertices       
(
 (0 0 0)
 (0.25 0 0)
 (0.25 0.25 0)
 (0 0.25 0)
 (0 0.75 0)
 (0.25 0.75 0)
 (0 1 0)
 (0.25 1 0)
 (0.75 0 0)
 (0.75 0.25 0)
 (1 0 0)
 (1 0.25 0)
 (0.75 0.75 0)
 (1 0.75 0)
 (0.75 1 0)
 (1 1 0)

 (0 0 2)
 (0.25 0 2)
 (0.25 0.25 2)
 (0 0.25 2)
 (0 0.75 2)
 (0.25 0.75 2)
 (0 1 2)
 (0.25 1 2)
 (0.75 0 2)
 (0.75 0.25 2)
 (1 0 2)
 (1 0.25 2)
 (0.75 0.75 2)
 (1 0.75 2)
 (0.75 1 2)
 (1 1 2)
 
);

blocks         
(
 hex (0 1 2 3 16 17 18 19) (10 10 10) simpleGrading (1 1 1)
 hex (3 2 5 4 19 18 21 20) (10 10 10) simpleGrading (1 1 1)
 hex (4 5 7 6 20 21 23 22) (10 10 10) simpleGrading (1 1 1)
 hex (1 8 9 2 17 24 25 18) (10 10 10) simpleGrading (1 1 1)
 hex (2 9 12 5 18 25 28 21) (10 10 10) simpleGrading (1 1 1)
 hex (5 12 14 7 21 28 30 23) (10 10 10) simpleGrading (1 1 1)
 hex (8 10 11 9 24 26 27 25) (10 10 10) simpleGrading (1 1 1)
 hex (9 11 13 12 25 27 29 28) (10 10 10) simpleGrading (1 1 1)
 hex (12 13 15 14 28 29 31 30) (10 10 10) simpleGrading (1 1 1)
 );

edges         
(
);

patches       
(
 patch inlet (
              (2 5 12 9)
              )

 patch outlet (
              (16 19 18 17)
              (19 20 21 18)
              (20 22 23 21)
              (17 18 25 24)
              (18 21 28 25)
              (21 23 30 28)
              (24 25 27 26)
              (25 28 29 27)
              (28 30 31 29)
             
                      )

  wall fixedWalls
    (
    (0 16 19 3)
    (3 19 20 4)
    (4 20 22 6)
    (6 22 23 7)
    (7 23 30 14)
    (14 30 31 15)
    (15 31 29 13)
    (13 29 27 11)
    (11 27 26 10)
    (10 26 24 8)
    (8 24 17 1)
    (1 17 16 0)
    (0 3 2 1)
    (3 4 5 2)
    (4 6 7 5)
    (5 7 14 12)
    (12 14 15 13)
    (9 12 13 11)
    (8 9 11 10)
    (1 2 9 8)
    )


   
);

mergePatchPairs
(
);

// ************************************************************************* //

The velocity plots are on this page .... https://sites.google.com/site/balkrishnanitt/


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