講座主題:Efficient sixthorder finite difference method for the nonlinear wave equation with variable coefficients
專家姓名:葛永斌
工作單位:大連民族大學
講座時間:2024年04月20日10:20-10:50
講座地點:數(shù)學與信息科學學院341
主辦單位:煙臺大學數(shù)學與信息科學學院
內(nèi)容摘要:
In this study, firstly, a sixth-order finite difference operator and correction technique of truncation error remainder are employed to construct a nonlinear high-order finite difference scheme and a linearized high-order finite difference scheme for solving the numerical solution of two-dimensional nonlinear wave equations with variable coefficients. Both new schemes have sixth-order accuracy in space and fourth-order accuracy in time. Then, the Richardson extrapolation technique is applied to obtain a numerical solution of sixth-order accuracy in both time and space. Meanwhile, the stability of the corresponding difference scheme for the linear wave equation is proved by Fourier analysis. In addition, two proposed sixth-order schemes are extended to solve the three-dimensional nonlinear wave equation. Finally, some numerical experiments are presented to confirm the effectiveness and accuracy of the proposed method.
主講人介紹:
葛永斌,男,漢族,,寧夏青銅峽市人。2000年寧夏大學應用數(shù)學專業(yè)碩士研究生畢業(yè),,獲理學碩士學位。2004年3月上海理工大學工程熱物理專業(yè)博士研究生畢業(yè),獲得工學博士學位。現(xiàn)為大連民族大學理學院教授,、寧夏大學兼職博士生導師。2010年5月至2011年5在美國肯塔基大學作訪問學者,。2020年12月入選寧夏自治區(qū)青年拔尖人才工程,。目前主要從事計算數(shù)學、計算流體力學,、計算生物學和數(shù)學軟件開發(fā)方面的研究。先后主持國家自然科學基金項目5項,,其中面上項目和青年項目各1項,,地區(qū)項目3項。主持教育部科學技術研究重點項目,、霍英東教育基金會高校青年教師基金項目,、寧夏自然科學基金重點項目、寧夏自治區(qū)重點研發(fā)項目等若干項,。在核心以上級別刊物上發(fā)表學術論文130余篇,,其中被SCI檢索60余篇。