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Model Comparison

Method (1) and method (2) both produce similar results, however method (2) is preferred for use in the rest of the simulations. This is because the body force appears in a natural manner: as an extra term in the governing equation. In method (1) the body force is produced by considering the equilibrium distribution, not of the actual fluid but of a fluid with a non-physical `equilibrium velocity'. The model tests described in sections 5.2.3, 5.2.4 and 5.3 and the interfacial wave simulations in chapters 7 and 8 will all have gravity implemented using method (2).


James Buick
Tue Mar 17 17:29:36 GMT 1998