Numerical investigation of jet impingement with cross flow -: Comparison of Yang-Shih and standard k-ε turbulence models

Computational fluid dynamics models are used to predict the heat transfer distribution on a smooth surface under an array of angled impinging jets. The three-dimensional numerical models simulate impingement with cross flow in one direction. Jet angle is varied between 30 degrees, 60 degrees, and 90 degrees as measured from the smooth flat impingement surface. Conjugate conduction in the heated boundary is included in the analysis. Two turbulence models are examined, the standard k-epsilon model and the Yang-Shih model. Local and average heat transfer coefficients are compared with test data for 30 test cases. The Yang-Shih model was able to predict average Nusselt number within 2-30%. The standard k-epsilon model predicts average Nusselt number with 0 to nearly 60% error.