On Tue, Feb 14, 2012 at 11:29 AM, Leland M Barnard <[email protected]>wrote:
> Is it possible to specify how gradients in the solution variable are > determined, e. g. by forward difference, backward difference or center > difference? > I believe that is what the central difference and upwind schemes convection terms currently do. The direction depends on the coefficient values. > For example, is is possible to write a convection term of the form > U*gradC that calculates gradC using a backwards difference, so that it > depends only on the value of C in cell n and n-1, and not in cell n+1? > The upwind convection term does that. Hope that helps. -- Daniel Wheeler
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