Topology of three-dimensional, variable density flows

摘要: Abstract : This paper is concerned with the interpretation of unsteady, variable - density flow fields. The topology determined by finding critical points and identifying character local solution trajectories. time evolution studied following paths in three-dimensional space invariants deformations tensor. methodology can be applied to any smooth vector field its associated gradient tensor including vorticity pressure approach provides a framework for describing geometry complex patterns. Concisely summarizing that may useful way gaining insight into dependent processes described large computational data bases. Applications descriptions flickering diffusion flame compressible wake are discussed. (KR)