The influence of mixed derivatives on the mathematical simulation of pollutants transfer

摘要

Both turbulent diffusion and dissolved matter dispersion are anisotropic processes. From the formal point of view this fact is expressed by the tensor form of the transfer coefficients. As a result, mixed derivatives of concentration appear in the transport equations. However many authors, for the sake of simplicity, neglect these derivatives. The paper deals with investigation of the influence of cross-derivatives, exerted on the results of calculations. Theoretical and numerical analyses lead to the conclusion, that investigated terms are of great importance and should not be neglected.