Method for accelerating three-dimensional finite-difference time-domain electromagnetic field simulation by using graphic processing unit (GPU) based on Open computer language (OpenCL)

Abstract

The invention provides a method for accelerating three-dimensional finite-difference time-domain (FDTD) electromagnetic field simulation by using a graphic processing unit (GPU) based on an Open computer language (OpenCL). The method is applied to the field of electromagnetic simulation and analysis; and design and realization of electromagnetic simulation are simplified by the OpenCL in an FDTD method. The method comprises the following steps of: setting an FDTD simulation parameter at first and dynamically applying a memory space; constructing a three-dimensional electromagnetic model and performing grid subdivision; initializing a calculation parameter of the OpenCL and performing FDTD accelerated simulation on the three-dimensional electromagnetic model based on the OpenCL; and finally releasing data stored in the memory by using a function in an OpenCL standard base and releasing central processing unit (CPU) memory resources. By the method, the FDTD electromagnetic field simulation speed is increased obviously; compared with a CPU calculation method, the method increases the speed by 5 to 10 times; a uniaxial perfect matched layer (UPML) absorbing boundary condition can be obtained, and the transmission of electromagnetic waves in a free space can be simulated; therefore, the FDTD electromagnetic field simulation can be applied widely and actually.

Description

technical field [0001] The invention relates to the field of electromagnetic field simulation analysis, in particular to a method for accelerating three-dimensional time-domain finite difference electromagnetic field simulation by a GPU (Graphic Processing Unit, graphics processor) based on OpenCL (Open Computing Language, open computing language). Background technique [0002] FDTD (Finite-Difference Time-Domain, finite difference in time domain) is a common method in the field of electromagnetic field simulation calculation. The FDTD method is to differentially disperse Maxwell’s equations in time and space, and through Leap frog algorithm iterations, the electric field and magnetic field in the space are calculated alternately; the electromagnetic field is simulated by updating time. changes to achieve the purpose of numerical calculation. When using the FDTD method to analyze electromagnetic problems, it is necessary to construct the spatial geometric parameters and mat...

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Problems solved by technology

[0005] Aiming at the shortcomings of the current FDTD electromagnetic field simulation calculation time being too long, and the current FDTD simulation acceleration method can only run on the GPU and has limited practicability, the present invention proposes an OpenCL-based GPU-accelerated three-dimensional time-domain finite difference electromagnetic field simulation method method

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