5. Contact models

This section describes what granular models can be used along with pair gran and fix wall/gran :

5.1. cohesion commands

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easo/capillary/viscous

sjkr

sjkr2

washino/capillary/viscous

5.2. model commands

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hertz

hertz/stiffness

hooke

hooke/stiffness

5.3. rolling_friction commands

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cdt

epsd

epsd2

epsd3

5.4. surface commands

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sphere

superquadric

5.5. tangential commands

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history

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