Heat Transfer in Turbulent Boundary-Layer Separation Over a Surface Cavity

Abstract

An experimental and analytical study is presented in this paper describing heat transfer in the region of separated flow over a two-dimensional rectangular cavity (of variable depth-width ratios) facing an oncoming turbulent boundary layer of variable thickness. The analysis, based on a prescription of eddy diffusion in the mixing region, predicts a heat transfer correlation, in terms of the foregoing variables, resulting in good agreement with the data. Experiments were performed with conditions of uniform temperature and uniform heat flux at the cavity walls and revealed no substantial difference between the two methods on the final correlation.

Modeling Separated Forced Convection in Laminar Flow Past Cavities

“…Haugen and Dhanak [6] found for cavity flow with an approaching turbulent boundary layer, that the index of the Reynolds number differed from that for attached flow for which St f p ex Re~B. They found …”

Heat or mass transfer from an open cavity

“…Miles [5], Haugen and Dhanak [16], Fox [17]) a comparison with previous work can only be qualitative. Haugen and Dhanak did experiments on turbulent flows over open cavities.…”

Numerical simulation of the turbulent air flow in the narrow channel with a heated wall and a spherical dimple placed on it for vortex heat transfer enhancement depending on the dimple depth

“…It is also important to note that the relief of discrete roughness at the channel wall is mainly predetermined by the technology of its making. So, most simple technology-made shapes are represented by cylindrical cavities formed by extrusion [2][3][4]. However hydraulic losses have appeared to be very significant when heat carrier is moving in channels with such cavities.…”