Dashpot elements model damping effects caused by a dashpot. This damping force is proportional to the relative velocity of the two nodes that define the element. This force is along the line connecting these nodes and is in the opposite direction of the relative velocity.
When using dashpot elements, you must specify a value in the Dashpot Coefficient field. The damping force is proportional to this value and to the relative velocity between the nodes on each contact element. This force is not affected by the cross-sectional area of the element. This is the classical, standard dashpot coefficient.