ICEM CFD-- ic engine combustion chamber meshing

chetan mundhe

hi, its been a 3 months i'm trying to mesh the bowl in piston combustion chamber of ic engine.. the geometry consists of inlet valve, cylinder wall and offset piston bowl and.. its a moving and deforming mesh problem. the clearance volume between cylinder head and piston is 1.5 mm and it can also be increased till 5mm.i got the initial mesh but it is having very less quality ( 4 percent and orthogonality angle of 1.2 deg.) so, can u plz tell me if its possible to have good quality mesh for this geometry in ICEM CFD or is there any other approch to mesh it. i want the mesh to deform from top dead center to bottom dead center i.e. from clearnce volume of 1.5mm to 117.5 mm. i'll very grateful for your suggestion.. thank u be happy regards chetan M.