Title :
Comparative Investigation of Two Modified QUICK Schemes for Advection-Diffusion Equation of Pollutants on Unstructured Grids
Author_Institution :
Hydraulic Res. Lab., Changjiang River Sci. Res. Inst., Wuhan, China
Abstract :
In this paper, two modified QUICK schemes, namely Q-QUICK and UQ-QUICK for improving the precision of convective flux approximation are verified in advection-diffusion equation of pollutants on unstructured grids. The constructed auxiliary nodes for Q-QUICK/UQ-QUICK are composed of two neighboring nodes plus the next upwind node, the later node is generated from intersection of the line of current neighboring nodes and their corresponding interfaces. 2D unsteady advection- diffusion equation of pollutants is conducted for their verifications on unstructured grids. The numerical results show that Q-QUICK and UQ-QUICK have similar computational accuracy to the central difference scheme and similar numerical stability to upwind difference scheme after applying the deferred correction method. In addition, their corresponding CPU times are approximately equivalent to those of traditional difference schemes and their abilities for adapting high grid deformation are robust.
Keywords :
convection; diffusion; numerical stability; water pollution; Q-QUICK scheme; UQ-QUICK scheme; advection-diffusion equation; auxiliary nodes; central difference scheme; neighboring nodes; numerical stability; pollutants; unstructured grids; upwind difference scheme; upwind node; Equations; Grid computing; Laboratories; Light emitting diodes; Mesh generation; Numerical stability; Physics computing; Rivers; Transportation; Water pollution;
Conference_Titel :
Bioinformatics and Biomedical Engineering , 2009. ICBBE 2009. 3rd International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2901-1
Electronic_ISBN :
978-1-4244-2902-8
DOI :
10.1109/ICBBE.2009.5162532
