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钱伟长力学 SEMINAR 960:Second-order Modified Ghost Fluid Method (2nd-MGFM) for Compressible Multi-medium Flows

创建时间:  2024-01-15  毛霜霜   浏览次数:

目:Second-order Modified Ghost Fluid Method (2nd-MGFM) for Compressible Multi-medium Flows

报告人:刘铁钢 北京航空航天大学

时间:2024118日星期四下午13:30

地点:上海大学延长校区力学所200学术报告厅


专家简介

刘铁钢,教育部“数学、信息与行为”重点实验室主任。获高等教育(研究生)国家级教学成果奖一等奖,北京市管理育人先锋。于1986年和1989年获得北京大学数学系理学学士和硕士。2001年获新加坡国立大学机械工程系流体力学工学博士。主要研究方向为可压缩多介质流体数值方法、内嵌数理机理的流场智能处理方法、气动优化、空化流建模及数值模拟、流-固耦合及动边界问题数值模拟等。提出了内嵌特征压缩的人工智能激波识别器、被广泛应用的修正虚拟介质(MGFM)方法和等熵单流体空化模型。共发表SCI论文100余篇,其中20余篇发表在J. Comput. Phys. 和 SIAM J. Sci. Comput. 顶级杂志。主持和参与多个国家自然科学基金重点项目,民机专项,中俄国际合作专项、科技部重大专项。曾任研究生院副院长兼培养处处长,中国数学学会理事,中国工业与应用数学学会常务理事,教育部高等教育数学类专业教学指导委员会秘书长;现任中国计算数学学会常务理事,北京市计算数学学会常务理事,《计算数学》《计算物理》等期刊编委。

摘要信息

Abstract:In this talk, we introduce a second-order modified ghost fluid method (2nd-MGFM) to simulate compressible multi-medium flow with an immiscible interface. To treat the material interface with higher-order accuracy, balanced conditions related to spatial derivatives at material interfaces are proposed. A multi-medium generalized Riemann problem is constructed to predict the states and the spatial derivatives along the normal direction at the interface, in which the balanced conditions are imposed. The predicted interface states and spatial derivatives along the normal direction are then employed to define the linearly distributed ghost fluid states. Theoretical analysis and numerical results show that the proposed 2nd-MGFM can satisfy these balanced conditions and eliminate the first order major error term occurring at the interface.

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钱伟长力学 SEMINAR 960:Second-order Modified Ghost Fluid Method (2nd-MGFM) for Compressible Multi-medium Flows

创建时间:  2024-01-15  毛霜霜   浏览次数:   

目:Second-order Modified Ghost Fluid Method (2nd-MGFM) for Compressible Multi-medium Flows

报告人:刘铁钢 北京航空航天大学

时间:2024118日星期四下午13:30

地点:上海大学延长校区力学所200学术报告厅


专家简介

刘铁钢,教育部“数学、信息与行为”重点实验室主任。获高等教育(研究生)国家级教学成果奖一等奖,北京市管理育人先锋。于1986年和1989年获得北京大学数学系理学学士和硕士。2001年获新加坡国立大学机械工程系流体力学工学博士。主要研究方向为可压缩多介质流体数值方法、内嵌数理机理的流场智能处理方法、气动优化、空化流建模及数值模拟、流-固耦合及动边界问题数值模拟等。提出了内嵌特征压缩的人工智能激波识别器、被广泛应用的修正虚拟介质(MGFM)方法和等熵单流体空化模型。共发表SCI论文100余篇,其中20余篇发表在J. Comput. Phys. 和 SIAM J. Sci. Comput. 顶级杂志。主持和参与多个国家自然科学基金重点项目,民机专项,中俄国际合作专项、科技部重大专项。曾任研究生院副院长兼培养处处长,中国数学学会理事,中国工业与应用数学学会常务理事,教育部高等教育数学类专业教学指导委员会秘书长;现任中国计算数学学会常务理事,北京市计算数学学会常务理事,《计算数学》《计算物理》等期刊编委。

摘要信息

Abstract:In this talk, we introduce a second-order modified ghost fluid method (2nd-MGFM) to simulate compressible multi-medium flow with an immiscible interface. To treat the material interface with higher-order accuracy, balanced conditions related to spatial derivatives at material interfaces are proposed. A multi-medium generalized Riemann problem is constructed to predict the states and the spatial derivatives along the normal direction at the interface, in which the balanced conditions are imposed. The predicted interface states and spatial derivatives along the normal direction are then employed to define the linearly distributed ghost fluid states. Theoretical analysis and numerical results show that the proposed 2nd-MGFM can satisfy these balanced conditions and eliminate the first order major error term occurring at the interface.


上一条:极端抗疲劳软材料及其应用

下一条:ECO-FRIENDLY ENGINEERING MATERIALS AND SUSTAINABILITY