Power placement question on a cube

Octagon1 · December 22, 2016, 16:20

Hi,

In FloTHERM XT, I made a 10 x 10 x 10 mm solid cube to go through a simple thermal simulation with convection and conduction only. I applied a thermal attribute of 2W for the cube and tried to place it right at the center of the overall domain. When I meshed and ran the simulation, I get a temperature range of 147 - 152degC on the cube. From that, it tells me floTHERM selects a point on the cube to apply the 2W instead of having the whole cube emit the 2W. The question is how does it determine which spot on the cube to apply the 2W, and is it possible for me to control that?

Gabriel_C · December 24, 2016, 02:30

Hi.
The power of 2W is applied onto the entire volume of the cube. The temperature gradient on its surface is normal in natural convection cases. To apply power on a smaller volume (for example a 2mm cube) inside your 10mm cube you just need to make another cuboid, overlap it with the original one and attach power to this smaller cuboid.
One more thing: power can be attached to volumes or to surfaces.
BR, Gabriel

Happy new year to all users

December 22, 2016, 16:20	Power placement question on a cube	#1
Octagon1 New Member Join Date: Dec 2016 Posts: 1 Rep Power: 0	Hi, In FloTHERM XT, I made a 10 x 10 x 10 mm solid cube to go through a simple thermal simulation with convection and conduction only. I applied a thermal attribute of 2W for the cube and tried to place it right at the center of the overall domain. When I meshed and ran the simulation, I get a temperature range of 147 - 152degC on the cube. From that, it tells me floTHERM selects a point on the cube to apply the 2W instead of having the whole cube emit the 2W. The question is how does it determine which spot on the cube to apply the 2W, and is it possible for me to control that?

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December 24, 2016, 02:30		#2
Gabriel_C Member Gabriel Ciobanu Join Date: Jul 2011 Posts: 47 Rep Power: 15	Hi. The power of 2W is applied onto the entire volume of the cube. The temperature gradient on its surface is normal in natural convection cases. To apply power on a smaller volume (for example a 2mm cube) inside your 10mm cube you just need to make another cuboid, overlap it with the original one and attach power to this smaller cuboid. One more thing: power can be attached to volumes or to surfaces. BR, Gabriel Happy new year to all users