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研究所、轉學考(插大)-流體力學
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101年 - 101 淡江大學 轉學考 流體力學#53233
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(b )請問甚麼是potential flow,其定義為何？
其他申論題
(b) Suppose fluid A is methanol (pA = 792 kg/m3), B is water {pB = 1000 kg/m3 )，and C is a manometer fluid with a specific gravity of 1.37; pressure P2 = 121 kPa; h1 = 30 cm; and h2 = 24 cm. Calculate Pi (kPa). (10%)
#194629
【已刪除】3. An aqueous potassium nitrate solution containing 60 wt% KNO3 at 80°C is fed to a cooling crystallizer in which the temperature is reduced to 40°C. Determine the temperature at which the solution reaches saturation and the percentage of the potassium nitrate in the feed that forms crystals. (30%)
#194630
4. Calculate the heat required to raise 200 kg of nitrous oxide from 20°C to 150°C in a constant-volume vessel. The constant-volume heat capacity of N2O in this temperature range is given by the equation Cv (kJ / kg • °C) = 0.855 + 9.42 x lO-4T where T is temperature in °C. (20%)
#194631
【已刪除】(a)如果口是velocity potential，請問的單位（公制）是甚麼？
#194632
(c )請說明streamline與pathline的異同
#194634
(d)請問Bernoulli’s方程式在何種流場條件下方可使用？
#194635
2. The equation of the stream function for a 2-D flow is given by (x2/2) + xy = C where C is a constant. Determine the velocity of a fluid particle at point (2，3). (20%)
#194636
3. In a 2-D incompressible flow, the x component of velocity is given by u = 3x2 -y. On the x-axis, the y-component of velocity is given by v = 2/x. Please find the expression for v. (20%)
#194637
4. In a 2-D incompressible flow, the velocity is given as V = (y3/3 + 2x - x2y)i + (xy2 - 2y - x2/3) j Please check whether this flow field represents an irrotationai flow. (20%)
#194638
5. For a 2-D incompressible flow with velocity potential □ given as □ = x2 - 2y2 . Please find the pressure difference between (3，2) and (5,-1). (20%)
#194639
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