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研究所、轉學考(插大)-流體力學
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93年 - 93 淡江大學 轉學考 流體力學#56119
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題組內容
解釋名詞及簡答題
(1) Fluid Statics 與 Fluid Dynamics 有何不同？（6 分）
其他申論題
(b) the molar flow rate of recycle gas (F2). [20 pts]
#213160
【已刪除】2. A binary mixture (A + B) which obeys the Raoult，s law is injected into a vacuum chamber. When the liquid mixture is in equilibrium with its vapor phase, the chamber is at 560 mmHg and 20 °C. Estimate the compositions (mole fractions) of liquid and gas phases at the equilibrium. [20 pts]
#213161
(a) A fluid is allowed to flow through slightly opened valve from a region where its pressure is 15 atm and 628 K to a region where its pressure is 3 atm，the whole operation being adiabatic. [20 pts]
#213162
(b) 1 lbm of gas at 100 psia and 370 °F, enclosed in a cylinder fitted with a movable frictionless piston, is kept at a constant volume until the temperature has failed to 250 °F. [20 pts]
#213163
(2)什麼是 Newtonian Fluid?什麼是 Viscous flow? (8 分）
#213165
(3)說明 Reynolds number 之物理意義。爲何 Reynolds number 大,流場傾向於 Turbulent Flow ? Reynolds number 小,流場傾向於 Laminar Flow ? (8 分）
#213166
(4)什麼是“boundary layer”？ boundary layer內速度分佈有何特性？（8分）
#213167
(5)在pipe flow之entrance region中*流體沿管道中心之速度是逐漸變大或變小？ Why? (6分）
#213168
(6)在 ftilly developed pipe flow 中》你認爲 laminar 與 turbulent velocity profiles 有何不同(可用圈示表示 之)？爲什麼？（8分）
#213169
【已刪除】 計算題： (7) Water (density: 1000 kg/m3) flows through pipes A and B. Oil, with specific gravity 0.8, is in the upper portion of the inverted U. Mercury (specific gravity 13.6) is in the bottom of the manometer bends. Determine the pressure difference, PA - PB, in units of kilopascals (kPa). (16 分）
#213170
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