Hi @dheiny. Thanks for the prompt response. Actually with reference from previous posts (Modelling of Solidification Process), I have constructed a preliminary solidification solver for binary alloys. My results are fairly good but I am slightly suspicious of convection during temperature gradient. So I am looking for a simple test case with 2D cavity. No solidification and imposed temperature on the left wall is slightly lower than the initial temperature of the liquid. All other walls are adiabatic. This should drive some convection. This simple case can verify my velocity field, especially magnitudes. But it might sound silly but I have no access to CAD tool. Is is possible to use the mesh I generated in Openfoam using blockMesh? If so I think my life would be little easier 