The prediction of heat transfer in the wake of cylinders in crossflow

A theory is presented which predicts heat transfer in the wake region of a cylinder in crossflow. The equations of Hiemenz describing laminar flow in the region of a stagnation point are modified to include an “apparent viscosity” term. The “apparent viscosity” is then related to the turbulent energy at the edge of the boundary layer in the wake by considering the laws of diffusion, dissipation and generation of turbulence. The solution of the equations, and the evaluation of the empirical constants introduced into the equations, is obtained by means of an analogue computer. The theory is compared with experimental data and is in good agreement for a freestream Reynolds number and turbulence intensity range 5 × 10 3 < Re α < 3·5 × 10 4 and 0·7per cent < Tu α