- #1
Carcul
- 8
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What is the *main* mechanism of heat transfer between a thermal resistance and water?
My doubt arose in the context of a problem (from a high school national test) dealing with the following situation: a 500 W thermal resistance made of copper is immersed in a jar containing 500 g of water at 20ºC, with the purpose of heating it to 90ºC, and then it is asked what is the principal mechanism of heat transfer between the resistance and the water.
Even being copper a very goog thermal conductor, we have here heat transfer between a fluid and a hot solid surface, so shouldn't it be mainly by convection? The correct answer is supposed to be "conduction", but I don't agree.
My doubt arose in the context of a problem (from a high school national test) dealing with the following situation: a 500 W thermal resistance made of copper is immersed in a jar containing 500 g of water at 20ºC, with the purpose of heating it to 90ºC, and then it is asked what is the principal mechanism of heat transfer between the resistance and the water.
Even being copper a very goog thermal conductor, we have here heat transfer between a fluid and a hot solid surface, so shouldn't it be mainly by convection? The correct answer is supposed to be "conduction", but I don't agree.