Premium
Control of spurious oscillations in the salt water intrusion problem
Author(s) -
Wikramaratna R. S.,
Wood W. L.
Publication year - 1983
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/nme.1620190811
Subject(s) - spurious relationship , aquifer , saltwater intrusion , nonlinear system , dispersion (optics) , mixing (physics) , aquifer properties , limiting , intrusion , geology , mechanics , geotechnical engineering , mathematics , physics , groundwater , engineering , statistics , optics , mechanical engineering , geochemistry , quantum mechanics , groundwater recharge
This paper shows that the ‘streamline upwinding’ proposed by Hughes and Brooks 1 is particularly simple to implement with the coupled nonlinear equations of the problem of salt water intrusion in a coastal aquifer. Because the mechanical dispersion effect is far larger than the molecular diffusion, the notorious spurious oscillations can be controlled by limiting the ratio of grid size to the streamline mixing length. The method is demonstrated on an example of a typical aquifer by giving the diagnostic variation of concentration and various salt profiles for different values of the key parameter.