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標題: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
語言英文
收錄於
會議性質國內
校內研討會地點
研討會時間20151022~20151023
通訊作者
國別中華民國
公開徵稿
出版型式
出處1st Association of Computational Mechanics Taiwan (ACMT) Conference
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