WIT Press


The Influence Of Mixed Derivatives On The Mathematical Simulation Of Pollutants Transfer

Price

Free (open access)

Paper DOI

10.2495/WP970611

Volume

20

Pages

9

Published

1997

Size

845 kb

Author(s)

J.M. Sawicki & P. Zima

Abstract

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 investiga- tion 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. 1 Governing equations Two main versions of the dissolved matter conservation law are commonly used for description of the mass transfer pr

Keywords