[Yann]

Are you running all these steps with OpenFOAM-8?

It seems there are a lot of things mixed up between OpenFOAM-8 and OpenFOAM-v2012. For instance, in the case you have provided, snappyHexMesh cannot be run with OpenFOAM-8 because you use locationsInMesh in you snappyHexMeshDict and this feature is only available in the ESI-OpenCFD branch (OpenFOAM-v2012).

Yann

[amol_patel]

Hi yann

I am using OpenFOAM-v2012.

Thanks,
amol

[Yann]

Hi Amol,

I ran your case with OpenFOAM-v2012 and here are few comments:

1. Your mesh has a very poor resolution in the solid region (see picture attached)
2. The timestep is limited by maxDi in controlDict: the solver lower the time step to satisfy the condition maxDi = 10 in the solid
3. For the fluids outlet boundary conditions, you should define fixedValue on p_rgh and pressureInletOutletVelocity on U.

What fluids are you working with? In thermophysicalProperties you seem to define water but you cannot use perfect gas for liquid water. It seems you use values coming from the shellAndTubeHeatExchanger tutorial in OpenFOAM-8, so you should switch back the equationOfState on rhoConst, as defined in the tutorial.

Yann