Non uniqueness of power-law flows

J Burczak, S Modena, L Székelyhidi - Communications in Mathematical …, 2021 - Springer
We apply the technique of convex integration to obtain non-uniqueness and existence
results for power-law fluids, in dimension d ≥ 3 d≥ 3. For the power index q below the …

On the classification of incompressible fluids and a mathematical analysis of the equations that govern their motion

J Blechta, J Málek, KR Rajagopal - SIAM Journal on Mathematical Analysis, 2020 - SIAM
In the first part of the paper we provide a new classification of incompressible fluids
characterized by a continuous monotone relation between the velocity gradient and the …

Continuous data assimilation for the 3D Ladyzhenskaya model: analysis and computations

Y Cao, A Giorgini, M Jolly, A Pakzad - Nonlinear Analysis: Real World …, 2022 - Elsevier
We analyze continuous data assimilation by nudging for the 3D Ladyzhenskaya equations.
The analysis provides conditions on the spatial resolution of the observed data that …

On unsteady internal flows of incompressible fluids characterized by implicit constitutive equations in the bulk and on the boundary

M Bulíček, J Málek, E Maringová - Journal of Mathematical Fluid …, 2023 - Springer
Long-time and large-data existence of weak solutions for initial-and boundary-value
problems concerning three-dimensional flows of incompressible fluids is nowadays …

Analysis of a fully-discrete, non-conforming approximation of evolution equations and applications

A Kaltenbach, M Růžička - … Models and Methods in Applied Sciences, 2023 - World Scientific
In this paper, we consider a fully-discrete approximation of an abstract evolution equation
deploying a non-conforming spatial approximation and finite differences in time (Rothe …

Weak solutions for the Stokes system for compressible non‐Newtonian fluids with unbounded divergence

M Pokorný, M Szlenk - Mathematical Methods in the Applied …, 2023 - Wiley Online Library
We investigate the existence of weak solutions to a certain system of partial differential
equations, modeling the behavior of a compressible non‐Newtonian fluid for small Reynolds …

Nonlinear dynamical analysis for globally modified incompressible non-Newtonian fluids

T Caraballo, AN Carvalho… - Journal of Mathematical …, 2023 - pubs.aip.org
We present the global modification of the Ladyzhenskaya equations, for incompressible non-
Newtonian fluids. This modification is through a cut-off function that multiplies the convective …

On the uniqueness of the solution and finite-dimensional attractors for the 3D flow with dynamic slip boundary condition

D Pražák, M Zelina - Differential and Integral Equations, 2024 - projecteuclid.org
We consider 3D incompressible non-Newtonian fluid, subject to a dynamic boundary
condition. Using an iteration scheme in Nikolski-Bochner spaces, we obtain additional …

On the well-possedness of time-dependent three-dimensional Euler fluid flows

M Bulíček, J Málek - arXiv preprint arXiv:2408.09573, 2024 - arxiv.org
We study the mathematical properties of time-dependent flows of incompressible fluids that
respond as an Euler fluid until the modulus of the symmetric part of the velocity gradient …

Weak solutions to the Navier-Stokes equations for steady compressible non-Newtonian fluids

C Burtea, M Szlenk - arXiv preprint arXiv:2401.05328, 2024 - arxiv.org
We prove the existence of weak solutions to steady, compressible non-Newtonian Navier-
Stokes system on a bounded, two-or three-dimensional domain. Assuming the viscous …