velocity calculations in mass flow inlet boundary condition

montazer1012 · October 16, 2010, 08:20

hi
I have a problem with fluent.when I specified a mass flow inlet condition for nozzle inlet of a shell and tube heat excganger, fluent calculate another velocity value for this inlet than I evaluated with continuty eq.

Philipov · October 18, 2010, 04:11

Give more information... 2D or 3D is the problem and how you calculate velocity? if the problem is 3D make sure your density is correct and just apply
v=G/S, where
v-velocity [m/s]
G-mass flowrate [m3/s]
S-cross section area [m2]

October 16, 2010, 08:20	velocity calculations in mass flow inlet boundary condition	#1
montazer1012 New Member montazer Join Date: Jul 2010 Posts: 19 Rep Power: 17	hi I have a problem with fluent.when I specified a mass flow inlet condition for nozzle inlet of a shell and tube heat excganger, fluent calculate another velocity value for this inlet than I evaluated with continuty eq.

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October 18, 2010, 04:11		#2
Philipov Senior Member Svetlin Filipov Join Date: Mar 2009 Location: United Kingdom Posts: 176 Rep Power: 18	Give more information... 2D or 3D is the problem and how you calculate velocity? if the problem is 3D make sure your density is correct and just apply v=G/S, where v-velocity [m/s] G-mass flowrate [m3/s] S-cross section area [m2]