Overlapping grids and multigrid methods for three-dimensional unsteady flow calculations in IC-engines.

Authors: Tu, J.Y., Fuchs, L.F.
Document Type: Article
Pubstate: Published
Journal: J. Numerical method in fluids
Volume: 15   693-714
Year: 1992


A new computational methodology with emphasis on using an overlapping grid technique and a multigrid method has been developed. The main feature of the overlapping-grid system is of extended flexibility to deal with three-dimensional complex multicomponent geometries. The multigrid method is incorporated into this technique to accelerate the convergence of the numerical solution. The current scheme has been applied for computations of the laminar flows in the multicomponent configuration of internal combustion engines. The flow is governed by three-dimensional, time-dependent, incompressible Navier-Stokes equations with the continuity equation. A time-independent grid system is constructed for the moving boundary, i.e. the moving piston in the engine.