Speaker
Dr
Alexander Panin
(Lomonosov MSU, faculty of physics, chair of mathematics)
Description
In some models (for example, in plasma physics and semiconductor physics), the blow-up phenomenon occurs, i. e. the solution's norm tends to infinity as time tends to a finite moment. There exist some methods to detect blow-up analytically: Pokhozhaev and Mitidieri's test function method, Levine's method, and Samarskii and Galaktionov's similarity solutions method. These methods typically provide us with an estimation of the blow-up moment. The numerical algorithm (based on N. N. Kalitkin and co-authors' ideas), however, allows us to specify the moment and the process of the solution’s blow-up by using Richardson's effective accuracy order. In particular, one can obtain the blow-up moment with the accuracy up to mesh interval. Some numerical experiments will be presented in order to demonstrate the effectiveness of the method.
Short biography note
- A.B. Al’shin, E.A. Al’shina, Numerical diagnosis of blow-up of solutions of pseudoparabolic equations, J. Math. Sci. 148(1) (2008), 143–162.
- N.N. Kalitkin, A.B. Al’shin, E.A. Al’shina, B.V. Rogov, Computations on Quasi-uniform Grids, Fizmatlit, Moscow, 2005 (in Russian).
- Korpusov M.O., Lukyanenko D.V., Panin A.A., Yushkov E.V. Blow-up for one Sobolev problem: theoretical approach and numerical analysis. JMAA, 442(2) (2016), 451-468.
Primary author
Dr
Alexander Panin
(Lomonosov MSU, faculty of physics, chair of mathematics)
Co-authors
Dr
Dmitry Lukyanenko
(Lomonosov MSU, faculty of physics, chair of mathematics)
Prof.
Maxim Korpusov
(Lomonosov MSU, faculty of physics, chair of mathematics)
