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> 104年 - 104 淡江大學 轉學考 流體力學#53150
104年 - 104 淡江大學 轉學考 流體力學#53150
科目：
研究所、轉學考(插大)-流體力學 |
年份：
104年 |
選擇題數：
0 |
申論題數：
6
試卷資訊
所屬科目：
研究所、轉學考(插大)-流體力學
選擇題 (0)
申論題 (6)
1. (20)Consider the flow field given by φ— ax
2
— ay
2
, where a = 3s
-1
. Show that the flow is irrotational. Determine the velocity potential for this flow.
【已刪除】2. (20)The shaded area shown is in a flow where the velocity field is given by
，and the coordinates are measured in meters. Evaluate the volume flow rate and the momentum flux through the shaded area.
【已刪除】3. (20)0il flows steadily in a thin layer down an inclined plane. The velocity profile is
Express the mass flow rate per unit width in terms of p,u, g,θ, and h .
(a) find f(r) if flow is a free vortex
(b) find f(r) if the flow is a forced vortex
【已刪除】5. (20)The horizontal velocity in the wake behind an object in an air stream of velocity U is given by
where r is the non-dimensional radial coordinate, measured perpendicular to the flow. Find an expression for the drag on the object.
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，and the coordinates are measured in meters. Evaluate the volume flow rate and the momentum flux through the shaded area.
Express the mass flow rate per unit width in terms of p,u, g,θ, and h .
where r is the non-dimensional radial coordinate, measured perpendicular to the flow. Find an expression for the drag on the object.