講座主題:Divergence-free finite element methods with Raviart-Thomas enrichment for imcompressible Stokes problems
專家姓名:芮洪興
工作單位:山東大學
講座時間:2024年05月29日09:00-10:00
講座地點:數學與信息科學學院341
主辦單位:煙臺大學數學與信息科學學院
內容摘要:
In this paper, we present the construction of divergence-free finite element methods for the incompressible Stokes equations on general simplicial meshes in 2D/2D domain with the index of polynomials on simplicial element small than or equal 4, where Raviart-Thomas mixed elements are used as enrichment elements for velocity. The discretization yields exactly divergence-free and pressure independent velocity approximation. LBB consistency condition and optimal order convergence are obtained. For the simple case where a P1⊕RT0-P0 element is used to approximate velocity and pressure, the method can be easily transformed into a pressure-robust and stabilized P1-P0 discretization. Numerical experiments illustrate the robustness and accuracy of our method.
主講人介紹:
芮洪興,山東大學二級教授,博士生導師。主要從事計算數學的方法、理論及應用研究。主持國家自然科學基金重點目、面上項目、國家重點研發項目子課題、中石化勘探院委托任務等。在Numer Math、M3AS、SINUM、Math Comp、IMAJNA、CMAME、JCP以及J Fluid Mech等發表多篇高水平論文,參編專著3部。獲教育部自然科學一等獎、山東省自然科學二等獎、教育部自然科學二等獎。曾任CSIAM常務理事兼油水資源數值方法專委會主任,中國計算數學學會常務理事,中國計算物理學會常務理事,現任山東省工業與應用數學會副理事長、山東數學會計算數學專委會主任。