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So far existence of dissipative weak solutions for the compressible Navier-Stokes equations (i.e. weak solutions satisfying the relative energy inequality) is known only in the case of boundary conditions with non zero inflow/outflow (i.e.,…

Analysis of PDEs · Mathematics 2019-05-08 Young-Sam Kwon , Antonin Novotny , Vladyslav Satko

Variational principles play a fundamental role in deriving evolution equations of physics. They are working well in case of nondissipative evolution but for dissipative systems they are not unique, not predictive and not constructive. With…

Statistical Mechanics · Physics 2020-09-02 Péter Ván , Róbert Kovács

We extend the theory of viscosity solutions to treat scalar-valued doubly-nonlinear evolution equations. Such equations arise naturally in many mechanical models including a dry friction. After providing a suitable definition for…

Analysis of PDEs · Mathematics 2021-01-19 Luca Courte , Patrick Dondl

In this paper we prove the existence and uniqueness of the weak solution for a dynamic thermoviscoelastic problem which describes frictional contact between a body and a foundation. We employ the nonlinear constitutive viscoelastic law with…

Mathematical Physics · Physics 2019-01-28 Stanisław Migórski , Paweł Szafraniec

This paper is concerned with a compressible MHD equations describing the evolution of viscous non-resistive fluids in piecewise regular bounded Lipschitz domains. Under the general inflow-outflow boundary conditions, we prove existence of…

Analysis of PDEs · Mathematics 2025-01-28 Yang Li , Young-Sam Kwon , Yongzhong Sun

The existence and uniqueness of the global strong solution with small initial data to the three-dimensional viscoelastic fluids is established.

Analysis of PDEs · Mathematics 2011-03-01 Xianpeng Hu , Dehua Wang

Fluids can behave in a highly irregular, turbulent way. It has long been realised that, therefore, some weak notion of solution is required when studying the fundamental partial differential equations of fluid dynamics, such as the…

Analysis of PDEs · Mathematics 2023-06-14 Dennis Gallenmüller , Raphael Wagner , Emil Wiedemann

In this work, we consider an extension to parabolic problems of the variational multiscale method with spectral approximation of the sub-scales. We first discretize in time using a finite difference scheme and second, apply the…

Numerical Analysis · Mathematics 2018-01-25 Tomás Chacón Rebollo , Soledad Fernández-García

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,…

Analysis of PDEs · Mathematics 2018-03-20 Riccarda Rossi

A weak-strong uniqueness result is proved for measure-valued solutions to the system of conservation laws arising in elastodynamics. The main novelty brought forward by the present work is that the underlying stored-energy function of the…

Analysis of PDEs · Mathematics 2020-07-17 Konstantinos Koumatos , Stefano Spirito

We resolve the issue of uniqueness of weak solutions for linear, inertial fluid-poroelastic-structure coupled dynamics. The model comprises a 3D Biot poroelastic system coupled to a 3D incompressible Stokes flow via a 2D interface, where…

Analysis of PDEs · Mathematics 2025-02-12 George Avalos , Justin T. Webster

In this paper we study the vanishing inertia and viscosity limit of a second order system set in an Euclidean space, driven by a possibly nonconvex time-dependent potential satisfying very general assumptions. By means of a variational…

Analysis of PDEs · Mathematics 2019-02-05 Giovanni Scilla , Francesco Solombrino

The existence and uniqueness of the local strong solution to the three-dimensional compressible viscoelastic fluids near the equilibrium is established. In addition to the uniform estimates on the velocity, some essential uniform estimates…

Analysis of PDEs · Mathematics 2010-01-21 Xianpeng Hu , Dehua Wang

This paper provides a framework to strong time periodic solutions of quasilinear evolution equations. The novelty of this approach is that zero is allowed to be a spectral value of the underlying linearized operator. This approach is then…

Analysis of PDEs · Mathematics 2023-11-02 Felix Brandt , Matthias Hieber , Arnab Roy

In this paper we consider the 3D Euler equations and we first prove a criterion for energy conservation for weak solutions with velocity satisfying additional assumptions in fractional Sobolev spaces with respect to the space variables,…

Analysis of PDEs · Mathematics 2024-05-15 Luigi C. Berselli , Rossano Sannipoli

In this paper, we derive a new model for the description of liquid crystalline flows. While microscopic Doi type models suffer from the high dimensionality of the underlying product space, the more macroscopic Ericksen--Leslie type models…

Analysis of PDEs · Mathematics 2021-03-04 Stefan Metzger

This paper proposes a novel particle scheme that provides convergent approximations of a weak solution of the Navier-Stokes equations for the 1-D flow of a viscous compressible fluid. Moreover, it is shown that all differential inequalities…

Analysis of PDEs · Mathematics 2023-01-12 Iasson Karafyllis , Markos Papageorgiou

In this paper, we prove the global existence of strong solutions for the inhomogeneous incompressible viscoelastic system without any additional structure assumptions on $\mathbb{R}^{3}$. Unlike the time weighted energy method presented by…

Analysis of PDEs · Mathematics 2026-03-03 Chengfei Ai , Mengxing Bei , Yong Wang

Maxwell models for viscoelastic flows are famous for their potential to unify elastic motions of solids with viscous motions of liquids in the continuum mechanics perspective. But the usual Maxwell models allow one to define well motions…

Numerical Analysis · Mathematics 2022-12-06 Sébastien Boyaval

In [Cheng, Lasarzik, Thomas 2025 ARXIV-Preprint 2509.25508], we studied a Cahn--Hilliard two-phase model describing the flow of two viscoelastoplastic fluids in the framework of dissipative solutions using a logarithmic potential for the…

Analysis of PDEs · Mathematics 2026-01-14 Fan Cheng , Robert Lasarzik , Marita Thomas