I have been trying to generate 360/7 sector mesh in ANSYS FORTE for IC Engine combustion simulation. The bowl profile I have is hemispherical, but there is no direct topology available for a hemispherical bowl, so I have been trying Topology 1. I am doing closed cycle simulation using the generated mesh, but it is failing near TDC(-1.96 CA) and the reason of error specified is 'Inversion of cell at -1.96 CA'.