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urgent: heat transfer fluid to solid

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Old   October 27, 2005, 09:49
Default urgent: heat transfer fluid to solid
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hi! i have to simulate a pipe flow with a heat transfer through the walls of the pipe. (aluminium pipe, outer temperature is constant) usually for something like that i created a rectangle in GAMBIT. then i definded the outer lines as walls, one line as inlet, one as outlet. this time I am asked to model the walls in 2D in gambit, not just as a line as before. so i did this. I drawed a shape that looks like three rectangles one upon the other. then i defined 8 of the lines as walls, one inlet, one outlet. then i defined three faces: the upper rectangle, the one in the middle and the lower one. after meshing each face i defined the middle face as "fluid" and the others as "solid".

is this generally right for this problem? because when i export this to fluent I have problems with setting the boundary conditions. I am able to set a constant temperature for the inner walls, which is not meant to be. when i calculate the results i just get constant temperatures in the wall and fluid, so probably there is no heat transfer between my wall and my fluid.

can anyone help me? thank you

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Old   October 28, 2005, 22:17
Default Re: urgent: heat transfer fluid to solid
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Hi Marco, Why do you have to create rectangles in Gambit? You can draw edges and create faces instead from these edges..

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