1. Liquid enters a heated tube at velocity Vf.
Derive a relation for the superficial velocity in terms of Vf, X, vf,
and vg. [Hint: Use j = [(1 X)/_f + X/_g]G and
substitute for _f, _g, and G].
2. Two-phase mixture flows at a rate of 750 kg/m2
s in a vertical tube of diameter 3 cm at 70 bar. Find the flow pattern at a
cross section where X = 10%.
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