Heat Transfer Questions & Answers | |
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Use the most accurate correlation generally. Yes, you can find the $h$ without knowing the surface temperature a priori through an iterative process.
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Well, as you mention, $\mu_{\rm w}$ is the viscosity of the fluid at the wall determined at the temperature of the wall.
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Find the wall temperature, and then find $\mu_{\rm w}$ from this wall temperature.
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True, it could be this way, but I was thinking of a river section where the sides are flowing water.
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Solve the problem and check if the simplified expression can be used or not. If it can not be used, re-solve the problem with the full expression.
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If you really want to know, you can try this in the quiz or exams and find out how many points you will lose.
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$\pi$ |