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Unformatted text preview: ENU 4134 Homework Assignment #1 Fall 2011 D. Schubring 1 ENU 4134 Homework Assignment #1 Fall 2011 DUE: Friday, September 9 ALLOWED COLLABORATION: You may discuss this assignment and the underlying con- cepts with your classmates, but your final assignment must be yours alone and reflect your own understanding of the material. Task 1. Average Parameters (10 points) Air and water flow at high pressure (about 140 atmospheres) in a round tube. A slug/bubbly transition flow forms (Figure 1). When 2 bubbles are shown, 4 are present (front & back). When 1 bubble is shown, 1 is present. Assume both types of gas structure are traveling at the same speed. Assume a single gas velocity and a single liquid velocity apply everywhere. Given the following (take phase densities as constants and mass flow rates as time averages). g = 150 kg m- 3 (1) f = 1000 kg m- 3 (2) m g = 0 . 15 kg s- 1 (3) m f = 0 . 45 kg s- 1 (4) Direction of Flow 3 cm 3 cm Spherical vapor bubbles, D = 1 cm...
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- Fall '11