# What is no slip condition in fluid mechanics?

Jul 27, 2022

The no slip condition is a boundary condition that states that there is no relative motion between a fluid and a solid boundary. In other words, the velocity of the fluid at the boundary is equal to the velocity of the boundary. This condition is often used in fluid mechanics and engineering applications.

## Other related questions:

### Q: How viscosity causes no-slip condition?

A: Viscosity is a fluid’s resistance to flow. The no-slip condition is a boundary condition that states that a fluid will not flow past a solid boundary. The two are related in that the no-slip condition is caused by the fluid’s resistance to flow.

### Q: What is a no slip surface?

A: A no slip surface is a material that does not allow for sliding or slipping. This can be achieved through a variety of means, such as a textured surface, a sticky surface, or a surface that is held in place by friction.

### Q: What is slip in fluids?

A: In fluid mechanics, slip is a phenomenon in which the velocity of a fluid relative to a solid surface is different from the velocity of the fluid relative to another fluid.

Slip occurs because of the no-slip condition, which states that the velocity of a fluid at a solid boundary is equal to the velocity of the boundary itself. This condition results in a shear stress at the boundary.

The no-slip condition is a result of the molecular interactions between the fluid and the solid surface. These interactions are much stronger than the interactions between the fluid molecules themselves.

The no-slip condition is valid for both laminar and turbulent flow. However, in turbulent flow, the fluid molecules are constantly moving and colliding with each other. As a result, the fluid molecules can temporarily exceed the boundary’s velocity. This temporary exceedance is called slip.