Discussion Forum

Hi all!

I am pretty new on comsol, so any help would be very appreciated!

I am trying to solve a one- way- coupled fluid flow and diluted solutes transport problem (the solutes transport is affected by the velocity field of the fluid flow's solution).

The fluid flow problem is solved as a coefficient form pde. I managed to insert the fluid flow's solution (its dependent variable) into the convection velocity field of the solutes transport, but only when both of the physics were solved together, on the same study. The problem is that this calculation is very time- consuming.

I suppose that if the fluid flow problem would be solved first, and after that the velocity field's solution will be inserted into the solutes transport problem as its convection velocity field, the calculation time will decrease significantly. But- when i solved the fluid flow problem in a different study, the solutes transport problem's convection velocity field couldn't identify the flow field's solution variable.

It will be very helpful if you can help me figure out how to use the fluid flow's solution as the velocity field of the solutes transport. I prefer doing it by using the fluid flow solution's variable, if it is possible, but exporting the solution and importing back to the solutes problem might work as well.

Thank you very much! Shachar