Jet fan Louver is not working

[Danish]

Hello Guys!

Here is my fds file and as per the guide, I am trying to define the vectors of the jet fans with 45 degrees downward. But the jet stream in smokeview is still normal to vents.

jet fan.fds

Generated by PyroSim - Version 2018.3.1210

01-Mar-2019 21:29:54

&HEAD CHID='jet_fan'/

&TIME T_END=50.0/

&DUMP RENDER_FILE='jet_fan.ge1', COLUMN_DUMP_LIMIT=.TRUE., DT_RESTART=300.0, DT_SL3D=0.25/

&MESH ID='Mesh02-a', IJK=57,32,12, XB=38.4,49.8,63.2,69.6,-11.4,-9.0/

&MESH ID='Mesh02-b', IJK=66,32,12, XB=49.8,63.0,63.2,69.6,-11.4,-9.0/

&OBST ID='Obstruction', XB=58.4,59.8,65.8,66.0,-9.6,-9.4, SURF_ID='INERT'/ 

&OBST ID='Obstruction', XB=58.4,59.8,66.6,66.8,-9.6,-9.4, SURF_ID='INERT'/ 

&OBST ID='Obstruction', XB=58.4,60.0,66.0,66.2,-9.6,-9.4, SURF_ID='INERT'/ 

&OBST ID='Obstruction', XB=58.4,60.0,66.4,66.6,-9.6,-9.4, SURF_ID='INERT'/ 

&OBST ID='Obstruction', XB=59.2,60.0,66.2,66.4,-9.6,-9.4, SURF_ID='INERT'/ 

&VENT ID='Mesh Vent: Mesh02 [XMAX]', SURF_ID='OPEN', XB=63.0,63.0,63.2,69.6,-11.4,-9.0/ 

&VENT ID='Mesh Vent: Mesh02 [XMIN]', SURF_ID='OPEN', XB=38.4,38.4,63.2,69.6,-11.4,-9.0/ 

&VENT ID='Vent', SURF_ID='HVAC', XB=59.4,59.8,66.0,66.6,-9.6,-9.6/ 

&VENT ID='Vent01', SURF_ID='HVAC', XB=58.4,58.4,66.4,66.8,-9.6,-9.4, UVW=-1.0,0.0,-1.0/ 

&VENT ID='Vent02', SURF_ID='HVAC', XB=58.4,58.4,65.8,66.2,-9.6,-9.4, UVW=-1.0,0.0,-1.0/ 

&HVAC ID='Node01', TYPE_ID='NODE', DUCT_ID='Duct', VENT_ID='Vent'/

&HVAC ID='Node02', TYPE_ID='NODE', DUCT_ID='Duct01', VENT_ID='Vent01'/

&HVAC ID='Node03', TYPE_ID='NODE', DUCT_ID='Duct02', VENT_ID='Vent02'/

&HVAC ID='Node', TYPE_ID='NODE', DUCT_ID='Duct','Duct01','Duct02', XYZ=59.284923,66.305631,-9.5/

&HVAC ID='Duct', TYPE_ID='DUCT', DIAMETER=0.65, NODE_ID='Node01','Node', LENGTH=0.330613/

&HVAC ID='Duct01', TYPE_ID='DUCT', AREA=0.08, PERIMETER=1.2, VOLUME_FLOW=0.95, NODE_ID='Node','Node02'/

&HVAC ID='Duct02', TYPE_ID='DUCT', AREA=0.08, PERIMETER=1.2, VOLUME_FLOW=0.95, NODE_ID='Node','Node03'/

&SLCF QUANTITY='VELOCITY', VECTOR=.TRUE., PBY=66.6/

&SLCF QUANTITY='VELOCITY', VECTOR=.TRUE., PBY=66.0/

&TAIL /

Please help me to resolve this.

Thanks in advace.

[Michael Abbot]

Hi Mate,

I would go here first - https://www.thunderheadeng.com/2016/04/modeling-jet-fans-part-2-updated/ and download the fds and psm input files. 

And I would also go here for the FDS verification manuals https://pages.nist.gov/fds-smv/manuals.html

All of these are known to work. 

Regards,

Michael Abbot

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[dr_jfloyd]

Your grid resolution is too coarse for UVW to have an effect. Your VENT occupies only a single cell.