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This paper proposes an e-cient parallel shooting and bouncing ray (SBR) method on the graphics processing unit (GPU) cluster for solving the electromagnetic scattering problems. At each incident direction, the parallel SBR method partitions the virtual aperture into sub-apertures, and distributes the computational process of each sub-aperture over GPU nodes. As ray tubes in the virtual aperture do not have the same computational time, the parallel e-ciency highly depends on how to partition the virtual aperture. This paper addresses this issue by a dynamic partitioning scheme according to the computational time at the previous angle, which can achieve excellent load balance. Numerical examples are presented to demonstrate the accuracy, high parallel e-ciency, good scalability and versatility of the proposed method.

PARALLEL SHOOTING AND BOUNCING RAY METHOD ON GPU CLUSTERS FOR ANALYSIS OF ELECTROMAGNETIC SCATTERING