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We establish the long-time existence of large-data weak solutions to a system of nonlinear partial differential equations. The system of interest governs the motion of non-Newtonian fluids described by a simplified viscoelastic rate-type…

偏微分方程分析 · 数学 2017-10-02 Miroslav Bulíček , Josef Málek , Vít Průša , Endre Süli

Viscoelastic rate-type fluid models constitute a fundamental framework for the mathematical description of complex materials exhibiting coupled elastic and viscous effects, with a wide range of applications in engineering, biomaterials, and…

偏微分方程分析 · 数学 2026-05-01 Miroslav Bulíček , Tomáš Los , Jakub Woźnicki

We prove that there exists a~large-data and global-in-time weak solution to a~system of partial differential equations describing an unsteady flow of an incompressible heat-conducting rate-type viscoelastic stress-diffusive fluid filling up…

偏微分方程分析 · 数学 2025-04-18 Michal Bathory , Miroslav Bulíček , Josef Málek

Viscoelastic rate-type fluid models are essential for describing the behavior of a wide range of complex materials, with applications in fields such as engineering, biomaterials, and medicine. These models are particularly useful for…

偏微分方程分析 · 数学 2025-05-01 Miroslav Bulìček , Jakub Woźnicki

We study a model for a fluid showing viscoelastic and viscoplastic behavior, which describes the flow in terms of the fluid velocity and an internal stress. This stress tensor is transported via the Zaremba--Jaumann rate, and it is subject…

偏微分方程分析 · 数学 2023-12-22 Thomas Eiter , Katharina Hopf , Robert Lasarzik

We propose thermodynamically consistent models for viscoelastic fluids with a stress diffusion term. In particular, we derive variants of compressible/incompressible Maxwell/Oldroyd-B models with a stress diffusion term in the evolution…

流体动力学 · 物理学 2018-03-14 Josef Málek , Vít Průša , Tomáš Skřivan , Endre Süli

We develop a mathematical theory for a class of compressible viscoelastic rate-type fluids with stress diffusion. Our approach is based on the concepts used in the nowadays standard theory of compressible Newtonian fluids as…

偏微分方程分析 · 数学 2020-01-08 Miroslav Bulíček , Eduard Feireisl , Josef Málek

We prove that there exists a weak solution to a system governing an unsteady flow of a viscoelastic fluid in three dimensions, for arbitrarily large time interval and data. The fluid is described by the incompressible Navier-Stokes…

偏微分方程分析 · 数学 2020-07-22 Michal Bathory , Miroslav Bulíček , Josef Málek

We focus on a highly nonlinear evolutionary abstract PDE system describing volume processes coupled with surfaces processes in thermoviscoelasticity, featuring the quasi-static momentum balance, the equation for the unidirectional evolution…

偏微分方程分析 · 数学 2014-02-11 Elena Bonetti , Giovanna Bonfanti , Riccarda Rossi

We consider a thermodynamically consistent model for thermoviscoplasticity. For the related PDE system, coupling the heat equation for the absolute temperature, the momentum balance with viscosity and inertia for the displacement variable,…

偏微分方程分析 · 数学 2018-03-20 Riccarda Rossi

We consider the system of partial differential equations governing two-dimensional flows of a robust class of viscoelastic rate-type fluids with stress diffusion, involving a general objective derivative. The studied system generalizes the…

偏微分方程分析 · 数学 2022-06-08 Miroslav Bulíček , Josef Málek , Casey Rodriguez

We consider a model for an incompressible visoelastic fluid. It consists of the Navier-Stokes equations involving an elastic term in the stress tensor and a transport equation for the evolution of the deformation gradient. The novel feature…

偏微分方程分析 · 数学 2019-10-23 Martin Kalousek

In this work, we introduce a notion of dissipative weak solution for a system describing the evolution of a heat-conducting incompressible non-Newtonian fluid. This concept of solution is based on the balance of entropy instead of the…

偏微分方程分析 · 数学 2022-06-13 Pablo Alexei Gazca-Orozco , Victoria Patel

The paper is concerned with the mathematical analysis of a class of thermodynamically consistent kinetic models for nonisothermal flows of dilute polymeric fluids, based on the identification of energy storage mechanisms and entropy…

偏微分方程分析 · 数学 2026-04-10 Miroslav Bulíček , Josef Málek , Endre Süli

In this paper, we study the existence of weak solutions to a steady system that describes the motion of a micropolar electrorheological fluid. The constitutive relations for the stress tensors belong to the class of generalized Newtonian…

偏微分方程分析 · 数学 2021-12-16 Alex Kaltenbach , Michael Růžička

We present a thermodynamically based approach to the design of models for viscoelastic fluids with stress diffusion effect. In particular, we show how to add a stress diffusion term to some standard viscoelastic rate-type models (Giesekus,…

流体动力学 · 物理学 2021-01-01 Mark Dostalík , Vít Průša , Tomáš Skřivan

We study a thermodynamically consistent diffuse interface model that describes the motion of a two-phase flow of two viscous incompressible Newtonian fluids with unmatched densities and a soluble surfactant in a bounded domain of two or…

偏微分方程分析 · 数学 2026-01-13 Bohan Ouyang , Maurizio Grasselli , Hao Wu

In this paper, we investigate the global existence of strong solutions for the inhomogeneous incompressible viscoelastic system with only velocity dissipation on $\mathbb{R}^{2}$. Due to the criticality of the time-weight, the methods for…

偏微分方程分析 · 数学 2026-03-03 Chengfei Ai , Yong Wang , Yunshun Wu

We consider the flow of a generalized non-Newtonian incompressible heat-conducting fluid in a~bounded two-dimensional domain, subject to Dirichlet boundary conditions for velocity and temperature. The fluid obeys a power-law constitutive…

偏微分方程分析 · 数学 2026-03-18 Miroslav Bulíček , Petr Kaplický , Lucie Wintrová

The motion of an elastic solid inside of an incompressible viscous fluid is ubiquitous in nature. Mathematically, such motion is described by a PDE system that couples the parabolic and hyperbolic phases, the latter inducing a loss of…

偏微分方程分析 · 数学 2009-11-10 Daniel Coutand , Steve Shkoller
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