Liquid Wall Contact Law

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Description

This frictional contact law implements a friction-style contact between liquid and the wall where contact shear is related to shear rate, viscosity, and a scaling factor to vary from stick to slip contact. It is only available in OSParticulas. When the surfaces are in contact, the frictional sliding force is

      [math]\displaystyle{ S_{slide} = k\thinspace \eta(k\Delta v) \Delta v }[/math]

where k is a scaling factor (with units 1/length), [math]\displaystyle{ \eta(\dot\gamma) }[/math] is viscosity of a fluid, and [math]\displaystyle{ \Delta v }[/math] is the final difference in tangential velocities between fluid and other material (usually a wall).

Properties

The properties for this law are:

Property Description Units Default
coeff The scaling factor k in the contact law 1/length units 2
liquidPhase The liquid phase none -1