101年 - 101 淡江大學轉學考流體力學#53233

科目：研究所、轉學考(插大)-流體力學 | 年份：101年 | 選擇題數：0 | 申論題數：8

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所屬科目：研究所、轉學考(插大)-流體力學

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申論題 (8)

【已刪除】(a)如果口是velocity potential，請問

的單位（公制）是甚麼？

(b )請問甚麼是potential flow,其定義為何？

(c )請說明streamline與pathline的異同

(d)請問Bernoulli’s方程式在何種流場條件下方可使用？

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%)

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%)

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%)

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%)