Effects of Upstream Wall Heating on Mixed Convection in a Backward-Facing Step Flow


Measurements and predictions are reported for buoyancy-assisting, laminar mixed convection boundary layer of air along a two-dimensional, vertical backward facing step, in which the upstream wall and the step are heated to a uniform temperature while the downstream wall is heated to the same or different uniform temperature. Laser-Doppler velocimeter and cold-wire anemometer were utilized to measure, respectively, the air velocities and the temperature distributions simultaneously. Flow visualizations were also performed to determine the flow reattachment length behind the backward facing step. Reported measurements are limited to the case where the upstream wall and teh step are heated to the same uniform temperature as the downstream wall, but numerical results are presented for the cases where these two temperatures are different and also for the situation when the upstream wall and the step are maintained as adiabatic surfaces.

Meeting Name

American Society of Mechanical Engineers, Heat Transfer Division (1994, Colorado Springs, CO, USA)


Mechanical and Aerospace Engineering

Document Type

Article - Conference proceedings

Document Version


File Type





© 1994 American Society of Mechanical Engineers (ASME), All rights reserved.

Publication Date

01 Jan 1994

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