Reconsider Prob. 8–62. Using the EES (or other) software, evaluate the effect of water mass flow rate on the free-stream H₂ gas velocity and the surface temperature of the parallel plates, and the effect of the free-stream H₂ gas velocity on the total heat transfer rate. By varying the mass flow rate of water for 0 < ṁ ≤ 0.58 kg/s, plot the free stream H₂ gas velocity and the surface temperature of the plates as a function of the mass flow rate of water. Also, plot the total heat transfer rate as a function of the free-stream H₂ gas velocity.

Data from problem 62

Liquid water is flowing between two very thin parallel 1-m-wide and 10-m-long plates with a spacing of 12.5 mm. The water enters the parallel plates at 20°C with a mass flow rate of 0.58 kg/s. The outer surface of the parallel plates is subjected to hydrogen gas (an ideal gas at 1 atm) flow width-wise in parallel over the upper and lower surfaces of the two plates. The free-stream hydrogen gas has a velocity of 5 m/s at a temperature of 155°C. Determine the outlet mean temperature of the water, the surface temperature of the parallel plates, and the total rate of heat transfer. Evaluate the properties for water at 30°C and the properties of H₂ gas at 100°C. Is this a good assumption?

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H₂ gas flow 1m- Water flow Parallel plates