Spectral element simulations of three-dimensional flow and augmented convection in a flat passage downstream from a fully developed channel with symmetric, transverse grooves on opposite walls were performed for 405⩽Re⩽764. Unsteady flow that develops in the grooved region persists several groove-lengths into the flat passage, increasing both local heat transfer and pressure gradient relative to that in a steady flat passage. Moreover, the heat transfer for a given pumping power in the first three groove-lengths of the flat passage was greater than the levels observed in a fully developed grooved passage.

Issue Section:
Heat Transfer Enhancement
Keywords:
Augmentation, Computational, Forced Convection, Heat Transfer, Three-Dimensional, heat transfer, channel flow, flow simulation, Navier-Stokes equations
Topics:
Flow (Dynamics), Heat transfer, Reynolds number, Simulation, Pressure gradient, Temperature
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