Difference between revisions of "Liquid Wall Contact Law"
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<math>S_{slide} = k\ \eta(k\Delta v) \Delta | <math>S_{slide} = k\ \eta(k\Delta v) \Delta v_t</math> | ||
where k is a scaling factor (with units 1/length), <math>\eta(\dot\gamma)</math> is viscosity of a fluid, and <math>\Delta | where ''k'' is a scaling factor (with units 1/length), <math>\eta(\dot\gamma)</math> is viscosity of a fluid (which may depend on shear rate), and <math>\Delta v_t</math> is the final difference in tangential velocities between fluid and the other material (usually a wall). | ||
== Properties == | == Properties == | ||
Revision as of 12:36, 2 March 2017
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\ \eta(k\Delta v) \Delta v_t }[/math]
where k is a scaling factor (with units 1/length), [math]\displaystyle{ \eta(\dot\gamma) }[/math] is viscosity of a fluid (which may depend on shear rate), and [math]\displaystyle{ \Delta v_t }[/math] is the final difference in tangential velocities between fluid and the 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 |