Engineering, 20.12.2019 05:31 mdaniella522
A10-cm-diameter, 30-cm-high cylindrical bottle contains cold water at 3°c. the bottle is placed in windy air at 27°c. the water temperature is measured to be 11°c after 45 min of cooling. disregarding radiation effects and heat transfer from the top and bottom surfaces, estimate the average wind velocity.
Answers: 2
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![N_{u}=0.3+\frac{0.62Re^{0.5}Pr^{\frac{1}{3}}}{[1+(0.4/Pr)^{\frac{2}{3} } ]^{\frac{1}{4}}}[1+(\frac{Re}{28200} )^{\frac{5}{8} }]^{\frac{4}{5} }](/tpl/images/0427/2934/e5381.png)
![62.42=0.3+\frac{0.62Re^{0.5}0.7317^{\frac{1}{3}}}{[1+(0.4/0.7317)^{\frac{2}{3} } ]^{\frac{1}{4}}}[1+(\frac{Re}{28200} )^{\frac{5}{8} }]^{\frac{4}{5} }](/tpl/images/0427/2934/705b4.png)
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A10-cm-diameter, 30-cm-high cylindrical bottle contains cold water at 3°c. the bottle is placed in w...
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