Below is a small example which demonstrates removing extract vents at 5 s, one vent on a mesh boundary and the other not. The behaviour of the two is different. In the .smv file there are 3 CLOSE_VENT
entries which makes sense to me, but it is not reflected in the display.
This was tested with FDS 6.5.3 and SMV 6.4.4 on Windows.
&HEAD CHID='VentCTRLMeshBoundary' /
&TIME T_END=10.0 /
&DUMP NFRAMES=40 /
&MESH ID='LowerMesh' IJK=10,10,5 XB=0,1,0,1,0,0.5 /
&MESH ID='UpperMesh' IJK=10,10,5 XB=0,1,0,1,0.5,1 /
&OBST XB=0,1,0,1,0.4,0.5 /
&VENT ID='OpenTop' SURF_ID='OPEN' XB=0,1,0,1,1,1 /
&VENT ID='OpenBottom' SURF_ID='OPEN' XB=0,1,0,1,0,0 /
&DEVC ID='Timer' QUANTITY='TIME' SETPOINT=5 XYZ=0.2,0.2,0.2 INITIAL_STATE=.TRUE. /
&VENT ID='ExtractA' SURF_ID='ExtractSURF' DEVC_ID='Timer'
XB=0.2,0.8,0.2,0.8,0.5,0.5 /
&VENT ID='ExtractB' SURF_ID='ExtractSURF' DEVC_ID='Timer'
XB=0.2,0.8,0.2,0.8,0.4,0.4 /
&SURF ID='ExtractSURF' VEL=2 COLOR='GREEN' /
&SLCF ID='VelocitySlice' QUANTITY='VELOCITY' VECTOR=.TRUE. PBX=0.5 /
&TAIL /