It is a substance that undergoes continuous deformation when subjected to shear stress
FLUID
It is also known as irrotanional flow or ideal flow.
Potential flow
What are the characteristics of a potential flow?
- no eddies can form
- no viscous force thus, no friction
Re= ∞
Explain the no-slip condition and the velocity gradient
- fluid bounding the moving upper plate has a velocity equal to the velocity of the moving plate
- fluid bounding the stationary plate has a velocity=0
velocity gradient between the two, SHEAR RATE= du/dy
It is the ratio of inertial force to viscous forces of a fluid
viscosity
two types of viscosity
- absolute viscosity (μ)
- dynamic viscosity (v) = viscosity/density
two types of viscosity
- absolute/ dynamic viscosity (μ)
- kinematic viscosity (v) = viscosity/density
It is the discipline that studies the relationship between fluid deformation and stress
Rheology
It is a plot of stress stress and shear rate.
Rheogram
It is an important device for measuring pressure differences.
Manometer
It states that in a stationary mass of a single static fluid, the pressure is constant in any cross section parallel to the earth’s surface but varies from height to height.
Hydrostatoc equilibrium
It is the layer of the fluid adjacent to the solid wall
boundary layer
He performed the classic experiment to show the distinction of the two types of flow.
Osborne Reynolds
It is the velocity at which laminar flow chnages into turbulent flow.
critical velocity
A dimensionless group used to distinguish flow patterns
reynolds number
