1. Flow flows through a contracting section of a duct, as in Fig.2. A velocity probe inserted at section (1) measures a steady value u,=2 m/s, while a similar probe at section (2) records a steady u,=6m/s . Estimate the fluid acceleration, if any, if Ar=20cm. II

Elements Of Electromagnetics
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Fluid mechanics. From question 1 to 3. And from question 1 to 2
(solving the problems,
1. Flow flows through a contracting section of a duct, as in Fig.2. A velocity probe inserted at
section (1) measures a steady value u,=2 m/s , while a similar probe at section (2) records a
steady u,=6m/s . Estimate the fluid acceleration, if any, if Ax=20cm.
(1)
(2)
Fig. 2
2. There is a huge water tank, and full of the water, the height of the tanker is h, there is a tiny
hole in the bottom of the tank, as shown in Fig. 3. Use the ideal Bernoulli equation to calculate the
velocity of fluid at the center of the hole.
Fig. 3
Transcribed Image Text:(solving the problems, 1. Flow flows through a contracting section of a duct, as in Fig.2. A velocity probe inserted at section (1) measures a steady value u,=2 m/s , while a similar probe at section (2) records a steady u,=6m/s . Estimate the fluid acceleration, if any, if Ax=20cm. (1) (2) Fig. 2 2. There is a huge water tank, and full of the water, the height of the tanker is h, there is a tiny hole in the bottom of the tank, as shown in Fig. 3. Use the ideal Bernoulli equation to calculate the velocity of fluid at the center of the hole. Fig. 3
(Ask and answer,
1. Judge each figure is wetting or nonwetting in Fig. 1, and denote the reason.
e= 76
e = 132
e = 84
e= 142
BaiEN
Fig.1
2. What is the Reynolds number? And which physical parameters has been relative?
3. What is three basic laws in studying fluid mechanics? Please give a brief introduction.
Transcribed Image Text:(Ask and answer, 1. Judge each figure is wetting or nonwetting in Fig. 1, and denote the reason. e= 76 e = 132 e = 84 e= 142 BaiEN Fig.1 2. What is the Reynolds number? And which physical parameters has been relative? 3. What is three basic laws in studying fluid mechanics? Please give a brief introduction.
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