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Old   April 18, 2013, 05:19
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Laura
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Hi there, I am modelling a box with 2 inlets and an outlet and with a heater of 30W. I would like to observe the natural convection - temperature changes.

I am using ideal-gas incompressible, laminar flow. t initial is 293K and the temperature of the heater rises to around 460K when I used pseudo transient.

I did the experiment manually and the temperature rose only by 7 degrees. does anyone know why this is happening? tnx
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Old   April 21, 2013, 04:00
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Majid Mostafazadeh
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Hi
What is your fluid for experiment and simulation?
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Old   April 21, 2013, 04:23
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Laura
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Air at 20 degrees
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Old   April 21, 2013, 05:28
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Majid Mostafazadeh
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Choose Boussinesq model for density. Consider the gravity. Run your case again...
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