Question
Download Solution PDF‘No slip condition’ at a fixed surface is applicable to the flow of which type of fluids?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
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.
Ideal fluid
Fluids which don’t have viscosity and are incompressible are termed as an ideal fluid such fluid do not offer shear resistance i.e no resistance is encountered as the fluid moves.
Real fluid
Fluids which do possess viscosity are termed as real fluids. These fluids always offer shear resistance i.e. Certain amount of resistance is always offered by these fluids as they move.
Newtonian fluids
Newtonian fluids defined as a real fluid for which the shear stress is linearly proportional to the shear strain rate.
Non-Newtonian fluid
Real fluids for which the shear stress is not linearly related to the shear strain rate are called non-Newtonian fluids
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