Q5 |The velocity distribution for flow over a plate is gives by u = 2y – y where u is e velocity in m/s at a distance y metres above the plate. Determine the velocity gradient and shear ress at the boundary and 1.5 m from it. Take dynamic viscosity of fluid as 0.9 N.s/m².

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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a ull zain 1Q
K/s
اسئله من 5 إلى 7. . .
•.
Q5
| The velocity distribution for flow over a plate is gives by u = 2y – y where u is
the velocity in m/s at a distance y metres above the plate. Determine the velocity gradient and shear
stress at the boundary and 1.5 m from it.
Take dynamic viscosity of fluid as 0.9 N.s/m².
Q6
Two large fixed parallel planes are 12 mm apart. The space between the surfaces
is filled with oil of viscosity 0.972 N.s/m². A flat thin plate 0.25 m² area moves through the oil at a
velocity of 0.3 m/s. Calculate the drag force:
(1) When the plate is equidistant from both the planes, and
(ii) When the thin plate is at a distance of 4 mm from one of the plane surfaces.
Q7
. If the surface tension at air-water interface
is 0.069 N/m, what is the pressure difference between inside and
outside of an air bubble of diameter 0.009 mm?
Transcribed Image Text:a ull zain 1Q K/s اسئله من 5 إلى 7. . . •. Q5 | The velocity distribution for flow over a plate is gives by u = 2y – y where u is the velocity in m/s at a distance y metres above the plate. Determine the velocity gradient and shear stress at the boundary and 1.5 m from it. Take dynamic viscosity of fluid as 0.9 N.s/m². Q6 Two large fixed parallel planes are 12 mm apart. The space between the surfaces is filled with oil of viscosity 0.972 N.s/m². A flat thin plate 0.25 m² area moves through the oil at a velocity of 0.3 m/s. Calculate the drag force: (1) When the plate is equidistant from both the planes, and (ii) When the thin plate is at a distance of 4 mm from one of the plane surfaces. Q7 . If the surface tension at air-water interface is 0.069 N/m, what is the pressure difference between inside and outside of an air bubble of diameter 0.009 mm?
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