Automotive Engine Modeling with a Hybrid Random Choice Method

A numerical procedure was introduced for solving one-dimensional equations of gas dynamics for a cylindrically or spherically symmetric flow. This method has been generalized to the two dimensional equations of gas dynamics in a cylindrical geometry. This is coupled at the boundary with a grid free method (where the computational elements are segments of vortex sheets) for approximating boundary layers on a flat plate and in a cylinder. Examples are given for flow in a motored engine chamber during intake and compression strokes.