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Forum: OpenFOAM Running, Solving & CFD

January 10, 2008, 05:12

Replies: 9

LESInterfoam unbounding k

Views: 1,954

Posted By danvica

Sorry, I wanted to include som

Sorry, I wanted to include some movies but they're too big.

These are the pictures of the latest time step.

http://www.cfd-online.com/OpenFOAM_Discus/messages/1/6360.jpg ...

Forum: OpenFOAM Running, Solving & CFD

January 10, 2008, 04:30

Replies: 9

LESInterfoam unbounding k

Views: 1,954

Posted By danvica

I also tried to exclude surfac

I also tried to exclude surface tension and interface compression so I set sigma=0 and cgamma=0.

Note: I use a coarser mesh in order to have faster results.
Check mesh reports as follow:
...

Forum: OpenFOAM Running, Solving & CFD

January 9, 2008, 04:05

Replies: 9

LESInterfoam unbounding k

Views: 1,954

Posted By danvica

I tried to reduce the complexi

I tried to reduce the complexity of the problem.

Now CheckMesh reports as follow:

Create polyMesh for time = constant

Time = constant

Mesh stats
points: 1743

Forum: OpenFOAM Running, Solving & CFD

January 8, 2008, 08:00

Replies: 9

LESInterfoam unbounding k

Views: 1,954

Posted By danvica

I'm really very sorry to insis

I'm really very sorry to insist but I'm stuck.

Even reducing the inlet velocity to approx (0,0,0) the solver stop after 6.7ms
Co value seems right.

This is the last step:

Courant...

Forum: OpenFOAM Running, Solving & CFD

January 8, 2008, 05:23

Replies: 9

LESInterfoam unbounding k

Views: 1,954

Posted By danvica

I tried with linear discretisa

I tried with linear discretisation and fixed time step of 2us.

This is what i obtained:

Courant Number mean: 4.00383e-05 max: 4.14158
Time = 0.000628

MULES: Solving for gamma ...

Forum: OpenFOAM Running, Solving & CFD

January 8, 2008, 03:50

Replies: 9

LESInterfoam unbounding k

Views: 1,954

Posted By danvica

Thanks Mr. Jasak, Just to be

Thanks Mr. Jasak,
Just to be sure. For first-order accuracy you mean the following (for rasinterfoam):

divSchemes
{
div(rho*phi,U) Gauss linear;
div(phi,gamma) Gauss linear;
...

Forum: OpenFOAM Running, Solving & CFD

January 8, 2008, 02:41

Replies: 9

LESInterfoam unbounding k

Views: 1,954

Posted By danvica

I tried also reducing the inle

I tried also reducing the inlet pressure from 1e5 to 1e4 an I've got the same results later in time.

It seems that changing BC from atmosphere to fixed pressure outlet things are going better...

Forum: OpenFOAM Running, Solving & CFD

January 7, 2008, 13:23

Replies: 9

LESInterfoam unbounding k

Views: 1,954

Posted By danvica

Even rasInterfoam is giving ba

Even rasInterfoam is giving bad results.
I tried with and without turbolence and also changing the div gamma schemes to gamma01 1 but the result is sooner or later a picosec simulation.

Apart...

Forum: OpenFOAM Running, Solving & CFD

January 7, 2008, 09:44

Replies: 9

LESInterfoam unbounding k

Views: 1,954

Posted By danvica

Usually rasinterfoam is faster

Usually rasinterfoam is faster than lesinterfoam, isn't it ?

I'll give it a try. Can I keep the same solver/solution setup ?

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