CUDA\textsuperscript{\textregistered} Simulations of Granular Flow

\emph{We have written CUDA\textsuperscript{\textregistered} code to perform granular simulations on GPUs. Normal interactions are modeled by a spring-dashpot model using a Gear's 5th order predictor-corrector scheme, while the tangential interactions are modeled by a new surface velocity difference scheme. Boundaries are created by using additional particles with constrained positions and velocities. Initial results show qualatative behavior expected from bulk particles.}