Confused abt the BCs for this simple ... prb.plz help!

Sri87 · September 11, 2013, 00:46

I have a fan which fitted in some given passage with obstructions.
I'm supposed to estimate the mass flow rate of air caused due to the fan. The fan will draw air from the atmosphere and will discharge also into the atmosphere ( after a certain length of the duct ). I'm wondering what will be my boundary conditions for this problem..I know only the Fan speed, and its Motor Power rating..Can somebody plz help as to what are BCs and what more data I ned to know??

duri · September 11, 2013, 14:21

I hope this works, keep inlet bc as constant total pressure which is equal to atmospheric pressure. And outlet as constant static pressure equals to atmospheric pressure. Calculate everything else using this and interior values.

September 11, 2013, 00:46	Confused abt the BCs for this simple ... prb.plz help!	#1
Sri87 New Member Join Date: Sep 2013 Posts: 1 Rep Power: 0	I have a fan which fitted in some given passage with obstructions. I'm supposed to estimate the mass flow rate of air caused due to the fan. The fan will draw air from the atmosphere and will discharge also into the atmosphere ( after a certain length of the duct ). I'm wondering what will be my boundary conditions for this problem..I know only the Fan speed, and its Motor Power rating..Can somebody plz help as to what are BCs and what more data I ned to know??

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September 11, 2013, 14:21		#2
duri Senior Member duri Join Date: May 2010 Posts: 245 Rep Power: 16	I hope this works, keep inlet bc as constant total pressure which is equal to atmospheric pressure. And outlet as constant static pressure equals to atmospheric pressure. Calculate everything else using this and interior values.