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“慶祝建校四十年”系列學(xué)術(shù)活動(dòng)之三元名家論壇:Uniqueness and numerical methods for inverse Stokes problems
作者:     供圖:     供圖:     日期:2024-05-24     來源:    

講座主題:Uniqueness and numerical methods for inverse Stokes problems

專家姓名:楊家青

工作單位:西安交通大學(xué)

講座時(shí)間:2024年05月29日15:00-16:00

講座地點(diǎn):數(shù)學(xué)與信息科學(xué)學(xué)院341

主辦單位:煙臺大學(xué)數(shù)學(xué)與信息科學(xué)學(xué)院

內(nèi)容摘要:

In this talk, we consider an inverse Stokes problem in a bounded domain with a discontinuous viscosity coefficient. By analyzing the singularity of the Dirichlet Green's function near the interface in combination with constructing a well-posed Stokes-Brinkman system in a small domain, we prove a global uniqueness theorem that the discontinuous viscosity coefficient can be determined by the local Dirichlet-to-Neumann map defined on an arbitrary small open subset of the boundary. Moreover, we also consider an inverse Stokes problem of reconstructing a bounded solid in an unbounded Stokes fluid, where the well-known LSM, FM and GLSM are extended from the wave equation into the Stokes equation by only taking the velocity fields in a certain domain. Finally, some numerical results are presented to illustrate the effectiveness of the inversion algorithms.

主講人介紹:

楊家青,西安交通大學(xué)數(shù)學(xué)與統(tǒng)計(jì)學(xué)院教授/博導(dǎo),,研究方向?yàn)榉磫栴}的數(shù)學(xué)理論與計(jì)算方法,。目前,在SIAM J. Appl. Math., SIAM J.Numer. Anal., SIAM J. Sci.Comput., SIAM J. Imaging Sci., JCP,,JDE,,IPI等國際期刊發(fā)表論文近四十篇。主持國家自然科學(xué)基金優(yōu)秀青年科學(xué)基金項(xiàng)目,,是國家重點(diǎn)研發(fā)計(jì)劃的課題負(fù)責(zé)人,;曾獲陜西省百人計(jì)劃青年項(xiàng)目、中國工業(yè)與應(yīng)用數(shù)學(xué)學(xué)會(huì)“CSIAM應(yīng)用數(shù)學(xué)青年科技獎(jiǎng)”;山東省自然科學(xué)二等獎(jiǎng)等,。