Approximation of entropy solutions to degenerate nonlinear parabolic equations

Autor(es)

Abreu, Eduardo ^[1] ; Colombeau, Mathilde ^{[1, 2]} ; Panov, Evgeny Yu ^{[3, 4]}

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Campinas, SP - Brazil

^[2] Univ Sao Paulo, Sao Paulo - Brazil

^[3] St Petersburg State Univ, St Petersburg - Russia

^[4] Novgorod State Univ, Veliky Novgorod - Russia

• Tipo de documento: Artigo Científico
• Fonte: ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND PHYSIK; v. 68, n. 6 DEC 2017.
• Citações Web of Science: 2

Resumo

We approximate the unique entropy solutions to general multidimensional degenerate parabolic equations with BV continuous flux and continuous nondecreasing diffusion function (including scalar conservation laws with BV continuous flux) in the periodic case. The approximation procedure reduces, by means of specific formulas, a system of PDEs to a family of systems of the same number of ODEs in the Banach space , whose solutions constitute a weak asymptotic solution of the original system of PDEs. We establish well posedness, monotonicity and -stability. We prove that the sequence of approximate solutions is strongly -precompact and that it converges to an entropy solution of the original equation in the sense of Carrillo. This result contributes to justify the use of this original method for the Cauchy problem to standard multidimensional systems of fluid dynamics for which a uniqueness result is lacking. (AU)

• Processo FAPESP: 12/15780-9 - Funções Generalizadas e Soluções Irregulares de Equações Lineares e Não-Lineares e Aplicações
• Beneficiário: Mathilde Francoise Charlotte Colombeau-Fonteyne
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado