Large-scale calculation of the specific absorption rate in a human body exposed to RF-EMFs by GPU cluster system

Recently, there is a growing concern regarding the effects of electromagnetic waves emanating from wireless communication devices on the health of humans. The specific absorption rate in a human body is estimated by the finite-difference time domain (FDTD) method with anatomically realistic computational human models. To improve the method´s calculation speed and realize large-scale computing with the computational human model, we adapt three-dimensional FDTD code to a multiple graphics processing unit (multi-GPU) cluster environment with Compute Unified Device Architecture (CUDA) and Message Passing Interface. In this paper, we present the implementation of the three-dimensional (3D) FDTD method on GPUs using CUDA and show our GPU cluster system. In addition, we demonstrate the SAR calculations of adult male exposed to RF-EMFs up to 10 GHz.