The heat transfer coefficient (h) for a vapor bubble rising through a boiling liquid is given by
h ¼ A kVcp d
where h ¼ heat transfer coefficient [e.g., Btu/(hr8F ft2 )], cp ¼ liquid heat capacity [e.g., cal/(g 8C)], k ¼ liquid thermal conductivity [e.g., J/(s Km)], ¼ liquid/vapor surface tension [e.g., dyn/cm], ¼ liquid vapor ¼ 1 v, d ¼ bubble diameter, and g ¼ acceleration due to gravity.
(a) What are the fundamental dimensions of V and A?
(b) If the value of h is 1000 Btu/(hr ft2 8F) for a 5 mm diameter steam bubble rising in boiling water at atmospheric pressure, determine the corresponding values of V and A in SI units. You must look up values for the other quantities you need; be sure to cite the sources you use for these data.
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