Mamchuk V. Mathematical modelling of turbulent boundary layers and wall jets

The mathematical model and numerical finite-difference method for prediction of stationary turbulent wall jets have been elaborated with the allowance of roughness and lateral curvature of streamlined surface, presence or absence of outer acompanying stream, witch is codirected with jet, presence or absence of adverse or favourable pressure gradient in acompanying stream. The computational experiment with the aim of modelling of turbulent boundary layers and wall jets has been made. As a result of this experiment the technique of boundary conditions determination has been modified by using improved cubical splines; the values of model coefficients for investigated types of flows have been found; the advantages of structure of implicit finite-difference method (2-nd order of accuracy) with strong stabilizing properties have been justified; the range of application of proposed mathematical model and computational method has been determined. The great volume of comparaison between numerical results and ex perimental data demonstrated the possibility of calculation method to simulate adequate to physics nature the peculiarities of formation of investigated turbulent wall flows under influence of mentioned above factors.