# run # cp -r $FOAM_TUTORIALS/multiphase/interFoam/laminar/\ mixerVessel2D/ . # cd mixerVessel2D
Test case is already preset
Test case is set for solver interFoam
Solver interFoam is unsteady solver based on PISO algorithm
Solver interFoam solves motion of 2 incompressible, isothermal immiscible fluids using a VOF (volume of fluid) phase-fraction based interface capturing approach
Computational mesh consists of blocks made in blockMesh application
Line 3: using m4 (macro processor) define variable for blockMesh14.1
Line 4: run application blockMesh
Line 5: create set of cells cellSet using utility topoSet. The cellSet is called rotor.
In recent versions of the tutorial the fourth and fifth lines are redundant, as the cell zone is defined directly in the file blockMeshDict – note well the name rotor inserted into the definition of some hex-es. Mentioned lines thus actually convert a cell zone to cell set and back.
Line 6: convert cellSetrotor to a cellZone (mesh part)