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On implicitly constituted fluids

MATHPHYS ANALYSIS SEMINAR

Date
Tuesday, January 26, 2021 14:00 - 16:30
Speaker
Erika Maringova (TU Wien)
Location
Online via Zoom
Series
Seminar/Talk
Tags
Mathematics and CS Seminar, mathematical_seminar_ics
Host
Julian Fischer
Contact

We present several aspects of implicit constitutive theory for homogeneous non-Newtonian fluids. In particular, we consider the maximal monotone graph setting which allows for the implicit formulation of the rheology and boundary conditions. We discuss graphs parametrized by temperature, but also a new type of boundary condition where not the full shear stress, but only its part is related to the slip velocity via the graph. Finally, we present a new approach where the existence of a Borel measurable selection of the graph need not be a priori assumed. Moreover, we define an implicit function whose null points define such general maximal monotone graph. All cases are applied to Navier-Stokes systems, where the existence analysis for long-times and large data is provided. Joint works with J. Zabenský, A. Abbatiello, M. Bulíek and J. Málek.

 


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