Quenching behavior and critical speed for a parabolic problem due to a moving nonlinear source

Autor: Tawikan Treeyaprasert
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Partial Differential Equations in Applied Mathematics, Vol 11, Iss , Pp 100912- (2024)
Druh dokumentu: article
ISSN: 2666-8181
DOI: 10.1016/j.padiff.2024.100912
Popis: This article investigates an initial–boundary value problem on the semi-infinite interval for a parabolic equation with a moving nonlinear source. The study presents criteria for both finite-time quenching and global existence of the solution. It is shown that there exists a critical speed v∗ for the nonlinear source, ensuring global existence of the solution when the speed of the moving nonlinear source is greater than or equal to v∗, while finite-time quenching occurs when the speed is smaller than v∗. The formula to calculate the critical speed v∗ is also provided for a special case.
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