The issue with the outlet air velocity setting in HVAC. #14209
Replies: 3 comments
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&HEAD CHID='DS-TJ'/ &MESH ID='Mesh01', IJK=40,40,40, XB=-0.8,0.0,0.0,0.8,0.0,0.8/ &REAC FUEL= 'N-HEPTANE' &MATL ID= 'STEEL' &OBST XB=6.4,6.6,0.3,0.5,0.00,0.01, SURF_IDS='N-HEPTANE POOL','STEEL','STEEL' / &MATL ID='CONCRETE', &SURF ID='concrete', &OBST ID='ENDING', XB=8.0,8.0,0.0,0.8,0.0,0.46, SURF_ID='concrete'/ &VENT ID='Mesh Vent: Mesh01 [XMAX]', SURF_ID='OPEN', XB=0.0,0.0,0.0,0.8,0.46,0.8/ &VENT ID='Vent01', SURF_ID='HVAC', XB=7.4,7.6,0.3,0.5,0.46,0.46/ &HVAC ID='Node01', TYPE_ID='NODE', DUCT_ID='Duct01', VENT_ID='Vent01'/ &DEVC ID='GAS7', QUANTITY='VELOCITY', XYZ=2.92,0.7,0.46/ &SLCF QUANTITY='VELOCITY', VECTOR=.TRUE., CELL_CENTERED=.TRUE., PBY=0.4/ &BNDF QUANTITY='BURNING RATE' / |
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This input file is too complicated. You should create a very, very simple case that demonstrates the problem. In doing so, you might discover something that you overlooked. You cannot expect other users to do this for you. |
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I ran this for a short bit of time. A couple of observations: -Since you are modeling the louvers I would not also use VEL_T or UVW. If I add these outputs: &DEVC QUANTITY='NORMAL VELOCITY',XYZ=2.80,0.4,0.53,ID='Aircurtain',IOR=-3/ The results show you are getting the expected velocity at face of the wall: |
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Dear respected scholar, I sincerely apologize for taking up your time. Could you kindly help me review the settings I made in HVAC? I have set the DUCT as follows:
&HVAC ID='Duct01', TYPE_ID='DUCT', DIAMETER=0.3, VOLUME_FLOW=0.2, NODE_ID='Node01', 'Node02', ROUGHNESS=1.0E-3, LENGTH=4.62053/
The outlet is set as:
&VENT ID='Aircurtain01', SURF_ID='HVAC', XB=2.84,2.92,0.0,0.8,0.53,0.53, UVW=0.577,0,-1/.
Based on my calculations, the outlet velocity should be 3.125 m/s, but the computed velocity is 4.2 m/s. Could this be a mistake in my calculations, or is there an issue with my simulation settings? I would greatly appreciate your response.
Thank you very much!
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