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Author Topic: fan (VENT) at an angle  (Read 4944 times)


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fan (VENT) at an angle
« on: January 27, 2010, 05:14:33 am »

Is it is possible to define a VENT (fan) at an angle, or inclined in pyrosim?


Charlie Thornton

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Re: fan (VENT) at an angle
« Reply #1 on: January 27, 2010, 09:07:20 am »

The VENT record itself cannot be angled.  However, vents can made to blow at an angle using the SURF parameter VEL_T (listed as Tangential Velocity for Supply surface types).

From the FDS Users Guide, section 9.1.4:
For example, the line

&SURF ID='LOUVER', VEL=-1.2, VEL_T=0.5,-0.3 /

is a boundary condition for a louvered vent that pushes air into the space with a normal velocity of 1.2 m/s and a tangential velocity of 0.5 m/s in either the x or y direction and -0.3 m/s in either the y or z direction, depending on what the normal direction is.