heat conductionthrough different solid layers with HT3D #12928
Replies: 3 comments
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The second case will not work. The obstructions are going to conform to the gas phase grid. Youi can put a lining material on the top of A or the bottom of B, but not in between. |
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Hi mcgratta. Thanks for your answer. I atttached my test case. When i run this file, i could see the transfer of heat through the layers. So it works. I dont really understand well the problem with "entre" surface. Could you please take a look and give me some advices |
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I take it that "entre" is the French word for "between." When you do a 3D heat conduction calculation, you can only apply a |
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Hello! I'd like to better understand the HT3D feature in FDS.
i want to simulate the heat transfers through multi solid layers. Each layer is made from a diffrent material.
Let take a simple case with two materials A and B. a bloc of A is neighbored to a bloc of B in Z direction (at Z=2.6). To use HT3D the code below will work :
&SURF ID='A', HT3D=T/
&SURF ID='B', HT3D=T/
&OBST ID='Obstruction', XB=4.0,13.0,-0.5,0,2.6,2.75, HT3D=T, MATL_ID='CONCRETE', SURF_ID='A'/
&OBST ID='Obstruction', XB=4.0,13.0,-0.5,0,2.55,2.6, HT3D=T, MATL_ID='STEEL', SURF_ID='B'/
However in some fds example, the feature 'entre' is used to connect two solid layers, like below :
&SURF ID='A', HT3D=T/
&SURF ID='B', HT3D=T/
&SURF ID='entre'/
&OBST ID='Obstruction', XB=4.0,13.0,-0.5,0,2.6,2.75, HT3D=T, MATL_ID='CONCRETE', SURF_ID6='A','A','A','A','entre','A'/
&OBST ID='Obstruction', XB=4.0,13.0,-0.5,0,2.55,2.6, HT3D=T, MATL_ID='STEEL', SURF_ID6='B','B','B','B','B','entre'/
What are the diffrences of the two above approaches?
Thank all in advance for your help!
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