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March 10, 2008, 18:16 |
Star-design/CCM problems
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#1 |
Guest
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Its very urgent, if you know it, please help , thanks very much indeed.
Basicly i am modelling the ventilation flows in a small room with a heat source placed in the middle. I made a single room with a lower opening (about 0.2 m2)as inlet with vel. mag 0.2m/s with temp 15 degree) and upper opening as outlet , and applied an area of 1x1m face as heat flux 1200w/m2 at floor level of the room, in order to form heat-driven flow in the room, however after running it , the temperature is very big >1000k , how come ? i tried many times, still cant fix it. |
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March 12, 2008, 03:45 |
Re: Star-design/CCM problems
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#2 |
Guest
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have you:
* checked the mesh? * used Coupled solver or segregated? * tried to switch outlet to pressure outlet? * tried to turn the heat source to 1/10 of what you want? * turned on the gravity and set properly? * turned on the ideal gas or constant density? (and in later case set the reference values properly) * used the temperature or enthalpy formulation in physics module * checked with another turbulence model? what about the convergence of variables? matej |
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