题目: Dynamically regularized Lagrange multiplier method for incompressible flow
主讲人:蓝日辉 副教授
时间:2026年08月27日(周四)10:00 —11:30
地点:理学院楼308
主办单位:理学院
主讲人简介:
蓝日辉,中国海洋大学副教授。2020年博士毕业于美国内华达大学拉斯维加斯分校,导师为孙澎涛教授。2020年至2022年在美国南卡罗莱纳大学开展博士后研究,导师为鞠立力教授。2023年1月入职中国海洋大学。主要研究领域为偏微分方程数值解。在Mathematics of Computation, IMA Journal of Numerical Analysis, Journal of Computational Physics, Computer Methods in Applied Mechanics and Engineering, Journal of Scientific Computing以及Journal of Numerical Mathematics等杂志发表论文29篇,主持国家自然科学基金青年项目,山东省优秀青年科学基金项目(海外),和山东省青年创新团队。
摘要:
For incompressible Navier-Stokes (NS) equation, we propose the dynamically regularized Lagrange multiplier methods (DRLM). Via the Lagrange multiplier, we incorporate the energy evolution process into the original system. The corresponding first- and second-order DRLMs are unconditionally energy stable when the nonlinear terms are treated explicitly. In addition, we introduce a dynamically regularized term, i.e., the stabilized first-order time derivative on the square of the Lagrange multiplier, so that the resulting numerical schemes allow for a larger time step. Lastly, we provide the temporal semi- and fully-discretization error estimates on the first- and second-order DRLM schemes.