Parallel computations of incompressible flow around falling spheres in a long pipe using moving computational domain method

In this paper, development of a new moving computational domain method and its parallel implementation are presented. The moving computational domain method is a method where the whole of the computational domain including bodies inside moves in the physical space without the limit of region size. The method is developed for simulation of falling spheres in a long pipe. We investigate flows around multiple bodies that move and interact with each other in accordance with six degrees of freedom motion. Movement of the falling multiple spheres in an infinite long square pipe is simulated. The parallel implementation based on the Domino method, which is a kind of block hyper-plane parallelism, is applied to the time-consuming Poisson solver. The parallel computation is performed using a multi-core processor with up to 24 cores, and its performance is tested.