教師資料查詢 | 類別: 會議論文 | 教師: 牛仰堯 NIU, YANG-YAO (瀏覽個人網頁)

標題:Comparison of Implicit and explicit Preconditioning Riemann Slovers for the Liquid Shock and Cavitation Simulation
學年104
學期2
發表日期2016/07/24
作品名稱Comparison of Implicit and explicit Preconditioning Riemann Slovers for the Liquid Shock and Cavitation Simulation
作品名稱(其他語言)
著者Yang-Yao Niu; Ming Jung Yang
作品所屬單位
出版者
會議名稱WCCM XII & APCOM VI 2016 Congress
會議地點Seoul, Korea
摘要Here, the fully implicit and scalar ADI type implicit preconditioning formulations based on the Riemann solvers for multi-phase flows are performed. 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. This paper presents implicit pre-conditioning approaches which indicate similarly accurate results obtained with both schemes. The current used 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 water-vapor saturation process. The current work shows that the implicit schemes are capable of improving the computational efficiency over its explicit counterpart. Several benchmark tests are used for numerical validations.
關鍵字Multiphase Flow;Riemann;solver;Preconditioning;Condensation shock
語言英文
收錄於
會議性質國際
校內研討會地點
研討會時間20160724~20160729
通訊作者
國別韓國
公開徵稿
出版型式
出處proceeding of WCCM XII & APCOM VI 2016 Congress
相關連結
Google+ 推薦功能,讓全世界都能看到您的推薦!