Couette Flow
Trending Questions
Q. The maximum velocity of one-dimensional incompressible fully developed viscous flow between two fixed parallel plates, is 6 ms−1. The mean velocity (in ms−1) of the flow is
- 2
- 3
- 4
- 5
Q. Oil (μ=0.44 Pa−s, r=888kg/m3) is filled in the space between two parallel plates which are 18 mm apart. The upper plate is moving at a velocity of 4 m/s. What is the shear stress on the plate?
- 97.8 Pa
- 48.9 Pa
- 79.8 Pa
- 87.9 Pa
Q. With reference to a standard Cartesian (x, y) plane, the parabolic velocity distribution profile of fully developed laminar flow in x-direction between two parallel, stationary and identical plates that are seperated by distance h, is given by the expression
u=−h28μdpdx[1−4(yh)2]
In this equation, the y = 0 axis lies equidistant between the plates at a distance h/2 from the two plates, p is the pressure variable and μ is the dynamic viscosity term. The maximum and average velocities are, respectively
u=−h28μdpdx[1−4(yh)2]
In this equation, the y = 0 axis lies equidistant between the plates at a distance h/2 from the two plates, p is the pressure variable and μ is the dynamic viscosity term. The maximum and average velocities are, respectively
- umax=−h28μdpdx and uaverage=23umax
- umax=h28μdpdx and uaverage=23umax
- umax=−h28μdpdx and uaverage=38umax
- umax=h28μdpdx and uaverage=38umax
Q. Match List-I (Velocity distribution) with List-II (Type of flow) and select the correct answer using the codes given below the lists:
- A−1, B−3, C−4, D−2
- A−2, B−3, C−4, D−1
- A−1, B−4, C−3, D−2
- A−2, B−4, C−3, D−1
Q. Flow rate of a fluid (density =100 kg/m3) in a small diameter tube is 800mm3/s. The length and the diameter of the tube are 2 m and 0.5 mm, respectively. The pressure drop in 2 m length is equal to 2.0 MPa. The viscosity of the fluid is
- 0.025 N−s/m2
- 0.012 N−s/m2
- 0.00192 N−s/m2
- 0.00102 N−s/m2