1.

What is the value of the fluid side heat transfer coefficient when air flows over cold pipes by natural convection?

A. 0.2 (T<sub>a</sub> T<sub>m</sub> / D)<sup>1/4</sup>
B. 0.2 (T<sub>a</sub> T<sub>m</sub> / D)
C. 0.2 (T<sub>a</sub> T<sub>m</sub> / D)<sup>1/3</sup>
D. 0.2 (T<sub>a</sub> T<sub>m</sub> / D)<sup>1/2</sup>
Answer» B. 0.2 (T<sub>a</sub> T<sub>m</sub> / D)


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