Parallel implementation for three-dimensional acoustic field computation in a penetrable wedge by image source method

Present work aims to the parallel implementation of message passing interface (MPI) and open multi-processing (OpenMP) for the three-dimensional acoustic field computation in a penetrable wedge. Possible practical application of the wedge waveguide propagation is extended to the continental shoulder or shallow water environment. By the image source method, the acoustical propagation solution is in conjunction with an extension of reflection analysis of spherical wave filed from a planar interface. Multiple reflections at the boundaries are taken as the originating from an image source depended on the surface and bottom positions. Analytical expression of acoustical pressure here is coupled with the Bessel function expansion in complex form. Two range-dependent cases, such as the along the slope (two dimension) and cross the slope (three dimension), are tested by the MPI and OpenMP parallelization and performance optimization. The multi-core platform of “Knights Landing” or KNL and many-core platform of “Tianhe-2” are applied to the utilization. The performance gain observed in using OpenMP of the FORTRAN code on high performance computing facilities is demonstrated.