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Forum: OpenFOAM Running, Solving & CFD

March 8, 2013, 05:33

Replies: 16

buoyantPimpleFoam - Water convection problem

Views: 2,385

Posted By dav.dap83

Hi tomf, The problem is that temperature...

Hi tomf,

The problem is that temperature inside the pipe drops very quickly, i.e. about 5 degrees in 5 mm. That is why the gradient is so large.

By the way, I also tried wallHeatTransfer...

Forum: OpenFOAM Running, Solving & CFD

March 7, 2013, 06:23

Replies: 16

buoyantPimpleFoam - Water convection problem

Views: 2,385

Posted By dav.dap83

Further information: before crashing, temperature...

Further information: before crashing, temperature near the borders exceeds initial data temperatures

Forum: OpenFOAM Running, Solving & CFD

March 5, 2013, 10:19

Replies: 16

buoyantPimpleFoam - Water convection problem

Views: 2,385

Posted By dav.dap83

I tried to set up constantGradient boundary...

I tried to set up constantGradient boundary condition, but it crashes. The new T file is:
dimensions [0 0 0 1 0 0 0];

internalField uniform 278.15; // 5 degC

boundaryField
{
...

Forum: OpenFOAM Running, Solving & CFD

February 20, 2013, 13:33

Replies: 16

buoyantPimpleFoam - Water convection problem

Views: 2,385

Posted By dav.dap83

Thank you for your answer. I took the Prandtl...

Thank you for your answer.
I took the Prandtl number value from the Prandtl number value for water at room temperature. I removed the line that gives the Prandtl number value in...

Forum: OpenFOAM Running, Solving & CFD

February 20, 2013, 08:57

Replies: 16

buoyantPimpleFoam - Water convection problem

Views: 2,385

Posted By dav.dap83

Thank you for your answer, now it doesn't give...

Thank you for your answer, now it doesn't give the error message anymore.

However, I don't understand the solution's behavior.

I slightly changed the boundary condition: T=390 also for the...

Forum: OpenFOAM Running, Solving & CFD

February 19, 2013, 11:35

Replies: 16

buoyantPimpleFoam - Water convection problem

Views: 2,385

Posted By dav.dap83

I have run this trial version. It should...

I have run this trial version. It should reproduce am equilibrium state, but it returns the same error:

p
dimensions [1 -1 -2 0 0 0 0];

internalField uniform 1e5;

boundaryField
{
...

Forum: OpenFOAM Running, Solving & CFD

February 19, 2013, 05:45

Replies: 16

buoyantPimpleFoam - Water convection problem

Views: 2,385

Posted By dav.dap83

Hi tomf, I tried, But I still incur in the same...

Hi tomf,
I tried, But I still incur in the same error

Forum: OpenFOAM Running, Solving & CFD

February 18, 2013, 06:18

Replies: 16

buoyantPimpleFoam - Water convection problem

Views: 2,385

Posted By dav.dap83

Hello, Thank you for your answer. The...

Hello,

Thank you for your answer. The boundary conditions for T are:

dimensions [0 0 0 1 0 0 0];

internalField uniform 293;

boundaryField

Forum: OpenFOAM Running, Solving & CFD

February 15, 2013, 13:04

Replies: 16

buoyantPimpleFoam - Water convection problem

Views: 2,385

Posted By dav.dap83

buoyantPimpleFoam - Water convection problem

Hi everyone,

I am trying to simulate convection into a water-filled horizontal cylinder. One end is kept at a higher temperature than the other boundaries. The solver gives the following error:
...

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