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let say i have a vertical cylinder of diameter 5 cm and 3 cm high. and i heat it to 1000 degree c. the room temperature is 20c . what would the convection heat transfer coefficient be?

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let say i have a vertical cylinder of diameter 5 cm and 3 cm high. and i heat it to 1000 degree c. the room temperature is 20c . what would the convection heat transfer coefficient be?

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AlephZero

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Or guess a number between 5 and 25 W/m^2.K, according to http://www.engineeringtoolbox.com/convective-heat-transfer-d_430.html

If you want an "accurate" value, you need to find a correlation based on measurements similar to your actual situation. For eaxmple your very short cylinder might be better approximated as a sphere than as a long cylinder ignoring end effects.

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russ_watters

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plus onvection heat transfer coefficient increase with temperature, it may be 25 W/m^2.K at 20-200 degree c but it will be higher at 1000 degree c.

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russ_watters

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What exactly the purpose of this question? Ie, how much accuracy is required? Can you measure instead of calculating? Use a controller?

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