Numerical study of the structure of turbulent flow and heat transfer in a flat channel with hexagonal honeycombs of various depths

The results of a numerical simulation by the RANS method of a separated flow in a flat channel with honeycomb surface are presented. The simulation was performed at the Reynolds Re = 14 000 – 28 000 determined from the average mass velocity and channel height. The distribution of the local Nusselt number was obtained for various Reynolds numbers and honeycomb depths. It is shown that the distribution of the Nusselt number on the surface is highly non-uniform, in particular, the maximum heat transfer is observed near the upper edge of the ribs, in the vicinity of which the largest velocity gradient is observed.