Numerical calculations of turbulent heat transfer downstream of a rearward-facing step

Examples of turbulent flowfield patterns and local heat transfer coefficients for a two-dimensional rearward facing step are presented as generated by a two equation kinetic energy-dissipation length scale model. The governing equations for momentum, energy, turbulent kinetic energy, and diffusion are defined, together with wall functions for velocity, temperature, the turbulent kinetic energy, and the turbulent kinetic energy dissipation rate. Attention is given to the proper choice of the approach profiles and numerical solution using the TEACH-T computer code. Calculations for three Re flows are described and compared with previous experimental data for a rearward facing step. Good agreement is demonstrated, and the model is concluded to yield values accurate enough for use in determining the heat transfer coefficients in engineering applications.