[ssmeherk]

Dear All,

I am trying to simulate dispersion of a gas(C2H4) from a very small square shaped inlet (0.0018m X 0.0018m) using rhoReactingBuoyantFoam solver.

Strangely, dispersion of C2H4 stops after initial few iterations.

I tried changing parameters of fvSchemes and fvSolution but nothing worked.

Later, I tried changing the mesh - from coarser to finer and later from ICEMCFD mesh to snappyHexMesh as well but even that did not work.

If I use a larger sized gas inlet, I do not see such behaviour. Dispersion takes place smoothly.

I know it cannot be like this but can't help to ask this question. Is there any limitation w.r.t the size of inlet to be taken in rhoReactingBuoyantFoam solver ?

Any help would be highly appreciated.

Thank you.

Meher.

[enthusiast]

Originally Posted by ssmeherk

Dear All,

I am trying to simulate dispersion of a gas(C2H4) from a very small square shaped inlet (0.0018m X 0.0018m) using rhoReactingBuoyantFoam solver.

Strangely, dispersion of C2H4 stops after initial few iterations.

I tried changing parameters of fvSchemes and fvSolution but nothing worked.

Later, I tried changing the mesh - from coarser to finer and later from ICEMCFD mesh to snappyHexMesh as well but even that did not work.

If I use a larger sized gas inlet, I do not see such behaviour. Dispersion takes place smoothly.

I know it cannot be like this but can't help to ask this question. Is there any limitation w.r.t the size of inlet to be taken in rhoReactingBuoyantFoam solver ?

Any help would be highly appreciated.

Thank you.

Meher.

I am guessing you are using same k and epsilon/omega values for your turbulence models. These values must be taken care of when you are changing the diameter of the inlet.