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categoryهندسة كيميائية schoolبكالوريوس event_available2026-07-15

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1. In a chemical processing plant, glycerin flows over a 1 m long heated flat plate at free- stream conditions V = 3 m/s and T = 10°C. If the plate is held at 30°C, determine the average heat transfer per unit width, assuming that the critical Reynolds number, Rec 500,000. Repeat the analysis for liquid ammonia. See attached tables at the end of the document for thermophysical properties of liquid ammonia. Liquid Ammonia Temperature (°C) p (kg/m³) c (kJ/kg-K) v (m2/s) x 106 k (W/m-K) Pr -50 703.69 4.463 0.435 0.547 2.6 -40 691.68 4.467 0.406 0.547 2.28 -30 679.34 4.476 0.387 0.549 2.15 -20 666.69 4.509 0.381 0.547 2.09 -10 653.55 4.564 0.378 0.543 2.07 0 640.1 4.635 0.373 0.54 2.05 10 626.16 4.714 0.368 0.531 2.04 250 20 611.75 4.798 0.359 0.521 2.02 30 596.37 4.89 0.349 0.507 2.01 40 580.99 4.999 0.34 0.493 2 50 564.33 5.116 0.33 0.476 1.99

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