Abstract
Collective flow effects associated with bounceoff and side splash recently seen in Nb+Nb collisions are investigated. The nuclear bounceoff effect is studied using a folded optical potential. The velocity dependence of the two-body interaction is found to be important for bounceoff. The side-splash effect is studied using linear transport theory. Based on a relaxation time approximation to the Boltzmann equation, we are able to explicitly isolate two separate contributions to the kinetic flow tensor. Specifically, the kinetic flow tensor is related to the collective velocity field and the pressure tensor. In turn, the pressure tensor is related to the nuclear viscosity. The two contributions to kinetic flow interfere destructively. Assuming laminar flow, the viscous term is found to be important in the nuclear side-splash effect.
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