help with fluent

iñigo · December 13, 2010, 05:38

As the title says, I´m working with fluent, simulating a solidification process. I haven´t specified the convection coefficient in the boundary conditions, and I heard that if you don´t specify it, fluent calculates it.
The question is: anyone knows what I have to do to make fluent give me the value? Thanks in advance

ComputerGuy · December 13, 2010, 18:30

Fluent would only be able to calculate it if you had fluid flowing over the boundary surface. As such, if you don't specify the value, I believe its default value is 0 W/m^2.K. That is, its default is a perfectly insulated boundary.

ComputerGuy

iñigo · December 14, 2010, 03:30

Well, that´s exactly the case, because I have the piece submerged in a molten salt bath that is moving. So how can I obtain the value?

December 13, 2010, 05:38	help with fluent	#1
iñigo New Member iñigo Join Date: Oct 2010 Posts: 6 Rep Power: 15	As the title says, I´m working with fluent, simulating a solidification process. I haven´t specified the convection coefficient in the boundary conditions, and I heard that if you don´t specify it, fluent calculates it. The question is: anyone knows what I have to do to make fluent give me the value? Thanks in advance

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December 13, 2010, 18:30		#2
ComputerGuy Senior Member Real Name :) Join Date: Jan 2010 Location: United States Posts: 192 Rep Power: 16	Fluent would only be able to calculate it if you had fluid flowing over the boundary surface. As such, if you don't specify the value, I believe its default value is 0 W/m^2.K. That is, its default is a perfectly insulated boundary. ComputerGuy

December 14, 2010, 03:30		#3
iñigo New Member iñigo Join Date: Oct 2010 Posts: 6 Rep Power: 15	Well, that´s exactly the case, because I have the piece submerged in a molten salt bath that is moving. So how can I obtain the value?