Heat transfer in the recirculating region formed by a backward-facing step

Abstract Analysis of experimental data, obtained in the present work on the vortical structure of a recirculating flow formed by a backward-facing step, has allowed the development of an approximate calculation method for predicting velocity and temperature profiles, reattachment length and local friction and heat transfer coefficients. An analytical expression for heat transfer in the reattachment region is derived which correlates experimental heat transfer data for different types of flow with a sudden expansion.