Turbulent Heat Transfer in a Channel with a Built-in Square Cylinder: the E

Turbulent heat transfer, in a three dimensional channel ow, in the presence of a square cylinder,was investigated numerically. the existence of a square cylinder in a channel, compared to a plainone, changes the heat transfer rate from the walls of the channel. a large eddy simulation (les)of a turbulent ow was performed to simulate ow behavior in a channel for reynolds numbersin the range of 1000 to 15000. the results obtained for the nusselt number distribution alongthe wall of the channel, at re = 3000, followed those of experimental data with good accuracy.it was observed that the existence of a square cylinder makes the attached wall boundary layerseparate, with a subsequent recirculation zone downstream of the cylinder. the nusselt numberdistribution along the wall of the channel shows an increase, with a relative maximum, slightlydownstream of the reattachment point. heat transfer from the wall of the channel increaseswith increasing reynolds number. a correlation was obtained for the variation of the mean totalnusselt number with the reynolds number.