WIND User's Guide - Keyword Reference, SMOOTHING

(WIND Documentation Home Page) (WIND User's Guide) (GMAN User's Guide) (MADCAP User's Guide) (CFPOST User's Guide) (WIND Utilities) (Common File User's Guide) (WIND Installation Guide) (WIND Developer's Reference) (Guidelines Documents)

(Introduction) (Tutorial) (Geometry and Flow Physics Modeling) (Numerical Modeling) (Boundary Conditions) (Convergence Monitoring) (Files) (Scripts) (Parallel Processing) (Keyword Reference) (Test Options)

SMOOTHING - Add dissipation to explicit operator

SMOOTHING [SECOND val1] [FOURTH val2] [SMLIMT val3] [zone_selector]

This keyword is used to apply second- and/or fourth-order dissipation to the explicit operator. The parameters val1, val2, and val3 are the second-order smoothing coefficient, the fourth-order smoothing coefficient, and the smoothing limiter, respectively.

Parameter Default "TVD-Like" Value
val1 1/4 < 1
val2 1/256 < 1/32
val3 1/4 1

Parameter	Default	"TVD-Like" Value
val1	1/4	< 1
val2	1/256	< 1/32
val3	1/4	1

The default values shown in the above table represent a Jameson-type smoothing, and are good for an Euler analysis. For viscous problems, it is recommended that val1, val2, and val3 be set equal to 1, 1/64, and 2, respectively.

See Also: BOUNDARY-DAMP, TEST 49