Numerical results for air undergoing laminar forced-convective heat transfer in the entrance region of a flat rectangular duct with uniform wall temperature are obtained for Uniform inlet velocity and temperature profiles. The coupled governing partial differential equal ions are solved in discretized form with property variations being updated through physical property relations. This enables the physical property and thermofluid solutions to converge simultaneously, resulting in a realistic solution to the governing equations. Constant-property results are also obtained, and Nusselt numbers of both the constant-and variable-property models are compared with those of other numerical computations. The results of the variable-property model are also compared with available experimental data. The variable-property results exhibit excellent correlation with the available experimental data. A sensitivity analysis is performed to determine the effects of individual property variations on local Nusselt numbers.
展开▼
