Exact Solutions of Second-Grade Fluid Equations

A. G. Petrova ; V. V. Pukhnachev ; O. A. Frolovskaya

Informatics and Automation, Modern Methods of Mechanics, Tome 322 (2023), pp. 180-194.

Résumé

The second-grade fluid equations describe the motion of relaxing fluids such as aqueous solutions of polymers. The existence and uniqueness of solutions to the initial–boundary value problems for these equations were studied by D. Cioranescu, V. Girault, C. Le Roux, A. Tani, G. P. Galdi, and others. However, their studies do not contain information about the qualitative properties of solutions of these equations. Such information can be obtained by analyzing their exact solutions, which is the main goal of this work. We study layered flows and a model problem with a free boundary, construct an analog of T. Kármán's solution, which describes the stationary motion of a second-grade fluid in a half-space induced by the rotation of the plane bounding it, and propose a generalization of V. A. Steklov's solution of the problem on unsteady helical flows of a Newtonian fluid to the case of a second-grade fluid.

Détail

Keywords: second-grade fluid, free boundary problems, layered flows, boundary layer, helical motions.

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