{BOUNDARY-DAMP | BDAMP}
   ZONE range1[,range2[, ... rangen]]
   BOUNDARY bnd1:bnd2
   [POINTS n]
   [SECOND c2]
   [FOURTH c4]
   [NOSMOOTHING [NI m1] [NJ m2] [NK m3]]
{END-BOUNDARY-DAMP | ENDBDAMP}

This keyword instructs WIND to utilize second- and fourth-order smoothing to damp waves in the vicinity of computational boundaries. It is also possible to turn off smoothing near any boundary for any numerical operator (xi, eta, or zeta). This option must be used with the SMOOTHING keyword and TEST 49 2. The user-specified values are defined as:

	range		Zone specification range, in one of the following forms:     zonenum    Selects zone zonenum begzone:endzone Selects all zones from begzone to endzone begzone: Selects all zones from begzone to MAXZONE, the total number of zones in the grid file :endzone Selects all zones from 1 to endzone ALL Selects all zones
	bnd1		Starting boundary (0 to begin at boundary 1). The values 1-6 correspond to the i = 1, i = imax, j = 1, j = jmax, k = 1, and k = kmax boundaries, respectively.
	bnd2		Ending boundary (0 to end at last boundary)
	n		Number of points into the domain over which boundary damping is to be applied
	c2		Second-order smoothing coefficient
	c4		Fourth-order smoothing coefficient

The NOSMOOTHING keyword is used to turn off smoothing (as specified using the SMOOTHING keyword) for the most recently specified ZONE and BOUNDARY. The keywords NI, NJ, and/or NK specify that smoothing is to be turned off for the xi, eta, and/or zeta operator, respectively, for boundaries bnd1 through bnd2.

m1, m2, m3

Number of points into the domain on boundaries bnd1 through bnd2 over which smoothing is to be turned off

Example

   BOUNDARY-DAMP
      ZONE 2:4 BOUNDARY 1:3 POINTS 15 SECOND .01 FOURTH .03
      ZONE 3:3 BOUNDARY 4:4 POINTS 10 SECOND .02 FOURTH .01
      ZONE 5:5
      BOUNDARY 2:2
      NOSMOOTHING NI 31 NJ 21
   END-BOUNDARY-DAMP