A New Method for Calculation of the Position of Separation Points in Two-Dimensional Flow Around Bodies at High Reynolds Number

Abstract

A method for analysis of separated flow about bluff bodies is presented. The emphasis is on boundary layer calculations and the determination of separation points. The wake flow in this project has been treated by point vortices, in accordance with a method presented by Sarpkaya and Shoaff. The wake model is not discussed herein, however. The boundary layer is treated by means of a Falkner-Skan transformation and the resulting differential equations are solved by a finite difference method. The external flow can change both in magnitude and direction, but so far only slow, gradual changes have been dealt with. The boundary layer model includes a laminar model and also, optionally, a simple model of turbulence. The flow very close to the separation point presents special problems. It has herein been modeled by a so-called triple-deck model, valid for laminar, subsonic flows.