Natural Convection Cooling of a Vacuum Flask
Model ID: 1448
The following example solves a pure conduction and a free-convection problem in which a vacuum flask holding hot coffee dissipates thermal energy. The main interest is to calculate the flasks cooling power; that is, how much heat it loses per unit time.
This example treats the natural convection cooling using two approaches:
• Using heat transfer coefficients to describe the thermal dissipation
• Modeling the convective flow of air outside the flask to describe the thermal dissipation using low-Re turbulence model.
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Temperature field influenced by the natural convection coming from the walls of a thermos. |
