03.1 - Aerodynamics – CFD Methods and Validation
AN ACCELERATION METHODOLOGY BASED ON DISTURBANCE REGION UPDATE METHOD FOR STEADY COMPRESSIBLE FLOWS
S. Hu¹, C. Jiang¹, Z. Gao¹, C.-H. Lee¹; ¹Beihang University, China
The disturbance region update method (DRUM) provides a framework for accelerating the simulation of compressible flows, solving the governing equations in dynamic computational domains (DCDs). The DCDs merely include disturbed cells with non-convergent solutions, and treats the viscous flows in a dynamic zonal way, to eliminate the worthless computational effort in the conventional global-update solution process as much as possible. In this paper, we propose some improvements on the algorithms of updating DCDs. Numerical test demonstrates that, benefiting from the reduction in the computational effort per iteration and the decrease in the total number of iterations, DRUM could accomplish remarkable convergence speedup for solving steady compressible flows; DRUM can be conjunction with spatial parallelism, capable of achieving a total speedup much higher than the linear speedup of the conventional global-update method.