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109年 - 109 國立臺灣大學_碩士班招生考試_化學工程學研究所:輸送現象及單元操作#106060
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Problem 1 (39 points)
(1) (10 points) Please give the SI units of the following physical quantities: (a) rate of strain (b)thermal diffusivity (c) NPSH (d)Fanning friction factor (e) Reynolds stress
相關申論題
(a) For a steady velocity field, which term(s) in the above equation can be neglected? (I point)
#452518
(b) For a flow with very small Reynolds number, which term(s) in the above equation can be neglected? (2 points)
#452519
(c) For an ideal flow, which term(s) in the above equation can be neglected? (2 points)
#452520
(d) Can the Navier-Stokes cquation be used to describe the flow of compressible fluid? (2 points)
#452521
(e) Can the Navier-Stokes equation be used to describe the turbulent flow of water? (2 points)
#452522
(3)(6 points) The fish concentration distribution in a lake is given by C-5t+3x+2y+z, where C represents the fish concentration (number of fish per cubic meter), t the time (min), and x,y;z the spatial coordinates (m). What is the for an observer fixed on a boat travelling on the lake with a velocity of Vx=5 (m/min), Vy=2 (m/min) and Vz=0.
#452523
(a) Give the definition of the "selectivity ratio" and "distribution coefficient' in extraction? (6 points)
#452524
(b) Which property in distillation has the same significance as the distribution coefficient? (2 points)
#452525
(5) (6 points) The following figure shows the relationship between the pressure drop and the gas velocity in a packed column where the liquid flows down wards and the gas stream goes upwards. What are the names and the meanings of point X and Y?
#452526
(1) Derive the Fick's first law for the absolute molar flux NA. (6 points)
#452527
相關試卷
110年 - 110 國立臺灣大學_碩士班招生考試_部分系所:輸送現象及單元操作#101948
110年 · #101948
109年 - 109 國立臺灣大學_碩士班招生考試_化學工程學研究所:輸送現象及單元操作#106060
109年 · #106060
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