http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
OpenMP 병렬 계산영역 재구성을 통한 Poisson 방정식 해석자 성능 개선
김기하(K.H. Kim),최정일(J.-I. Choi),권응수(E.S. Kweon),김성빈(S.B. Kim) 한국전산유체공학회 2018 한국전산유체공학회지 Vol.23 No.1
We propose an OpenMP based parallelization technique to improve computational performance for solving Poisson equation in a commercial casting analysis software (AnyCastingTM). The Poisson equation is solved using Red-Black Gauss-Seidel method under practical constraints that admit a large tolerance but provide reasonable results within a limited computational time. Profiling the module for the Poisson equation solver indicates poor convergence locally in the computational domain. To improve the solution convergence, we consider the following two procedures; 1) redistributing pre-assigned processors only to sub-domains where solution is not converged, and 2) updating the solution after a few sub-iterations for solving the Poisson equation in the entire domain. The present method provides a better load balance and reduces the computational time by about 20%, while maintaining the solution accuracy in the original method.