What is the equivalent pressure head of mercury corresponding to 30 cm column of kerosene of relative density 0.8?
What is dynamic viscosity in Pa-s for a liquid having relative density of 0.85 and kinematic viscosity of 2.5 centistoke?
The space between two parallel plates kept 4 mm apart is filled with an oil of dynamic viscosity 0.2 Pa-s. What is the shear stress on the lower fixed plate, if the upper one is moved with a velocity of 1.6 m/s? .
The velocity distribution in a viscous flow over a plate is given by
u = 4y - y2 for y ≤ 2m
where, u = velocity in m/s at a point distant y from the plate. If the coefficient of dynamic viscosity is 1.5 Pa-s, what is the shear stress at y= 1.2 m?
What is the pressure inside a soap bubble, over the atmospheric pressure if its diameter is 2 cm and the surface tension is 0.1 N/m?
The gap between a -horizontal shaft and a concentric sleeve is filled with viscous oil. The sleeve moves with a constant velocity of 1.5 m/s when a force of 1500 N is applied parallel to the axis of the shaft. If it was required to move the sleeve at a velocity of 2 m/s, what should have been the force?
for the given problem, L, D, μ and fare constant
A perfect fluid is:
A perfect fluid (also known as an ideal fluid) is Incompressible and frictionless.
The concept of continuum in fluid flow assumes that the characteristics length of the flow is
When a shear stress is applied to a substance, it is found to resist it by static deformation, the substance is:
The condition of ‘no slip’ at boundaries is applicable to:
When a real fluid flows past a solid boundary, a layer of fluid which comes in contact with the boundary surface adheres to it on account of viscosity. Since this layer of fluid cannot slip away from the boundary surface it attains the same velocity as that of the boundary.
In other words, at the boundary surface there is no relative motion between the fluid and the boundary. This condition is known as the no slip condition.
∴ The condition of "No-slip" at rigid boundaries is applicable to flow if all real fluids.