Q [LIMIT] [PRESSUREMIN pmin] [PRESSUREMAX pmax] \|
[DENSITYMIN dmin] [DENSITYMAX dmax]
This keyword may be used, with unstructured grids only, to set limits on the pressure and density to aid convergence. The limits pmin, pmax, dmin, and dmax are non-dimensional, normalized by the freestream static values. The default values are pmin = dmin = 0.01 and pmax = dmax = 250. In practice, setting the maximums to about two or three times the stagnation values is reasonable.
Note while the limits can be set to very small (or large) values, the limiting cannot be turned off. Specifying a limit as zero or a negative value results in the default being used.
See Also: DQ LIMITER, FIXER
Last updated 8 Dec 2006