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### 5. Contact models

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

#### cohesion commands

Click on the style itself for a full description:

sjkr | sjkr2

#### model commands

Click on the style itself for a full description:

hertz | hertz/stiffness | hooke | hooke/stiffness

#### rolling_friction commands

Click on the style itself for a full description:

cdt | epsd | epsd2

#### tangential commands

Click on the style itself for a full description:

history | no_history