On the Numerical Modeling of Impinging Jets, Heat Transfer - A Practical Approach, Numerical Heat Transfer, Part A: Applications: An Int

ABSTRACT. Steady state numerical simulation of impinging jet heat transfer at H/D = 2 is methodically investigated for the following parameters: Turbulence models (k-ε low Re, k-ω low Re and V2F), grid density (0.25E06, 0.5E06, 1E06 and 2E06 cells), grid topology (2 types), inlet velocity corresponding to Re (10000, 20000 and 30000) and inlet velocity profile (uniform flow and fully developed flow). Effect of numerical discretization scheme is also investigated. The study resulted in 95 simulations. The simulation results are compared with different published experimental data. It was found that the V2F turbulence model performs best for these types of simulations. Furthermore, the choice of turbulence model and inlet velocity profile significantly affects the results. Grid topology is also found to be important. Careful CFD simulations are capable of predicting the heat transfer of impinging jets with good accuracy. (This work can be seen as a best practice guide for this type of simulations)