Syntax:
tangential history [other model_type/model_name pairs as described here ] keyword values
heating_tangential_history values = 'on' or 'off'
on = model contributes to surface heating in the frame of surface sphere/heatable
off = model does not contributes to surface heating
Description:
This granular model is based on the general description of granular force interaction as described in pair gran.
The spring part of the tangential force (k_t) is a "history" effect that accounts for the tangential displacement ("tangential overlap") between the particles for the duration of the time they are in contact.
If this model is chosen, then this "tangential overlap" spring force is actually calculated / taken into account. The coefficient of friction cof is the upper limit of the tangential force through the Coulomb criterion Ft = cof*Fn, where Ft and Fn are the tangential spring and normal force components in the formulas above.
This model contributes to surface heating in the frame of surface sphere/heatable if the appropriate flag is activated
Default:
heating_tangential_history = 'off'