Evolution of flame shape to a vortex pair

The PSC (Propagation of Surfaces under Curvature) algorithm is adapted to t he simulation of a flame propagation in a premixed medium including the eff ect of volume expansion across the flame front due to exothermicity. The al gorithm is further developed to incorporate the flame anchoring scheme. Thi s methodology is successfully applied to numerically simulate the response of an anchored V-flame to two strong free stream vortices, in accord with e xperimental observations of a passage of Karman vortex street through a fla me. The simulation predicts flame cusping when a strong vortex pair interac ts with flame front. In other words, this algorithm handles merging and bre aking of the flame front and provides an accurate calculation of the flame curvature which is needed for flame propagation computation and estimation of curvature-dependent flame speeds.