Coefficient of Friction in Hydrodynamic Lubrication Calculator

Coefficient of Friction in Hydrodynamic Lubrication

Coefficient of Friction in Hydrodynamic Lubrication Equation

$$ \mu_h = \frac{ \eta \cdot U }{ P \cdot h } $$ where:

μ_h = Coefficient of friction (Dimensionless)

η = Dynamic viscosity of the lubricant (Pa s)

U = Relative velocity between moving surfaces (m/s)

P = Pressure (Pa)

h = Lubricant film thickness (m)

Calculator

Property to Calculate:

Coefficient of friction (μ_h):

Dynamic viscosity of the lubricant (η):

Relative velocity between moving surfaces (U):

Pressure (P):

Lubricant film thickness (h):

Equation Assumptions

The system is in steady state.
Fluid flow is laminar.
The lubricant is incompressible.
The fluid is newtonian.
The lubricant is in the hydrodynamic regime.