journal article Feb 01, 2021

Investigation of the weak solubility of the fractional Voigt alpha-model

Abstract
Abstract

This paper is devoted to investigating the weak solubility of the alpha-model for a fractional viscoelastic Voigt medium. The model involves the Voigt rheological relation with a left Riemann–Liouville fractional derivative, which accounts for the medium’s memory. The memory is considered along the trajectories of fluid particles determined by the velocity field. Since the velocity field is not smooth enough to uniquely determine the trajectories for every initial value, we introduce weak solutions of this problem using regular Lagrangian flows. On the basis of the approximation-topological approach to the study of hydrodynamical problems, we prove the existence of weak solutions of the alpha-model and establish the convergence of solutions of the alpha-model to solutions of the original model as the parameter






tends to zero.
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References
Details
Published
Feb 01, 2021
Vol/Issue
85(1)
Pages
61-91
License
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Funding
Russian Science Foundation Award: 19-11-00146
Russian Foundation for Basic Research Award: 19-31-60014
Cite This Article
A. V. Zvyagin (2021). Investigation of the weak solubility of the fractional Voigt alpha-model. Izvestiya: Mathematics, 85(1), 61-91. https://doi.org/10.1070/im9020