Towards Simple Implicit Preconditioning Riemann Solvers for the Simulation of the Low Mach number Flows
學年 104
學期 1
發表日期 2015-10-22
作品名稱 Towards Simple Implicit Preconditioning Riemann Solvers for the Simulation of the Low Mach number Flows
作品名稱（其他語言）
著者 Y. Y. Niu; M. J. Yang
作品所屬單位
出版者
會議名稱 1st Association of Computational Mechanics Taiwan (ACMT) Conference
會議地點 National Taiwan University, Taipei, Taiwan
摘要 Here, an unsteady matrix-free implicit preconditioning formulation for multi-phase flows with arbitrary equation of state based on the AUSMD type Riemann solvers are developed for multi-phase flows at allspeed. The numerical stability problem caused by the multi-scale speed of sound due to uncertain dissipation terms in the current schemes that can be resolved by rescaling the eigenvalues of the Euler type system equations to enhance computational convergence and keep accuracy. This paper considers a homogeneous two-phase mixture model with the assumption of kinematics and thermodynamics equilibriums. The thermodynamics behaviors of liquid phase, vapor phase and their phase transitional process are described by a temperature dependent hybrid equation of state which includes a mass-fraction averaged formula of watervapor saturation process. The proposed numerical fluxes are validated against several benchmark tests and and enables general equations of state to be handled for complicated multiphase flow simulations.
關鍵字 Multiphase Flow;Riemann Solver;AUSM;Low Mach number Flows
語言 en
收錄於
會議性質 國內
校內研討會地點 無
研討會時間 20151022~20151023
通訊作者
國別 TWN
公開徵稿
出版型式
出處 1st Association of Computational Mechanics Taiwan (ACMT) Conference
相關連結

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/106864 )