Heat transfer in a horizontal rectangular duct

saisanthoshm88 · July 21, 2013, 02:37

I need to analyse the flow in a horizontal rectangular duct and heat transfer is involved in the problem.

But I'm not sure if I should activate the gravity (buoyancy) then, because activating gravity I think will turn the scenario into a vertical duct flow.

I use a velocity inlet and pressure outlet (at atmospheric pressure) and turbulence is involved.

Could some one please clarify about this

ghorrocks · July 21, 2013, 06:18

You need gravity if any bouyancy effects occur, such as liquids at the bottom, gas at the top, or heavy particles sinking and light one rising.

You can define the gravity vector in any direction you like, so you can model a horizontal duct with bouyancy.

July 21, 2013, 02:37	Heat transfer in a horizontal rectangular duct	#1
saisanthoshm88 Senior Member --------- Join Date: Oct 2010 Posts: 303 Rep Power: 17	I need to analyse the flow in a horizontal rectangular duct and heat transfer is involved in the problem. But I'm not sure if I should activate the gravity (buoyancy) then, because activating gravity I think will turn the scenario into a vertical duct flow. I use a velocity inlet and pressure outlet (at atmospheric pressure) and turbulence is involved. Could some one please clarify about this __________________ Best regards, Santhosh.

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July 21, 2013, 06:18		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	You need gravity if any bouyancy effects occur, such as liquids at the bottom, gas at the top, or heavy particles sinking and light one rising. You can define the gravity vector in any direction you like, so you can model a horizontal duct with bouyancy.