Optimization of RANS Coefficients for Steady and Decelerating Turbulent Jets

The RANS model is optimized for steady and decelerating axisymmetric turbulent jets.The model was found to be the most suitable candidate for optimization, and two optimized coefficient sets were developed as a result.Each set minimizes the sum of root mean square errors, with one set focused on mean velocities and the other on both mean velocities and Reynolds shear stress.The self-similarity of standard and optimized RANS coefficient sets was then investigated.The optimized sets demonstrated improved self-similarity over the standard coefficient set, showing a close match with a value of 2.2.