Accelerating Poisson solvers in front tracking method using parallel direct methods. (2nd September 2015)

• Record Type: Journal Article
• Authors: Mehrabani, M.T.; Nobari, M.R.H.; Tryggvason, G.
• Is Part Of: Computers & fluids. Volume 118(2015)
• Page Start: 101
• Page End: 113
• Publication Date: 2015-09-02
• Subjects: Parallel direct solver -- Poisson equation -- Multiphase flow -- Incompressible flow -- Finite difference -- Curved pipe; Fluid dynamics -- Data processing -- Periodicals; 532.050285
• DOI: 10.1016/j.compfluid.2015.06.013
• Languages: English
• ISSNs: 0045-7930

Abstract

Highlights: Acceleration of parallel direct Poisson solvers in multiphase flows. Define of masked bubble strategy to remarkably reduce the computational cost. Comparison of computational time for different direct solvers when using masked bubble strategy. Abstract: Parallel direct computation is implemented in multiphase flow simulation of bubbles in a curved duct using a front tracking method to improve the computational cost. To solve the density Poisson equation, three methods including the SOR, FGMRES and PARDISO are tested using two strategies of full domain and masked bubble. The comparison of numerical simulations at the same conditions indicates that the PARDISO scheme under the masked bubble strategy considerably reduces the computational time and RAM usage, which enables simulations on very fine grid resolutions.