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In this paper, we mainly introduce a general method to study the existence and uniqueness of solution of free boundary problems with partially degenerate diffusion.

Analysis of PDEs · Mathematics 2019-11-21 Siyu Liu , Mingxin Wang

In this survey we go through some of the recent results about the regularity of vectorial free boundary problems of Bernoulli type and free boundary systems. The aim is to illustrate the general methodologies as well as to outline a…

Analysis of PDEs · Mathematics 2025-10-14 Giorgio Tortone , Bozhidar Velichkov

In this paper, we have defined the free boundary formulation for two extended Blasius problems. These problems are of interest in boundary layer theory and are deduced from the governing partial differential equations by using appropriate…

Numerical Analysis · Mathematics 2020-11-16 Riccardo Fazio

In this paper, we study the stability of traveling wave solutions arising from a credit rating migration problem with a free boundary, After some transformations, we turn the Free Boundary Problem into a fully nonlinear parabolic problem on…

Analysis of PDEs · Mathematics 2024-01-02 Claude-Michel Brauner , Yuchao Dong , Jin Liang , Luca Lorenzi

Model two-dimensional singular perturbed eigenvalue problem for Laplacian with frequently alternating type of boundary condition is considered. Complete two-parametrical asymptotics for the eigenelements are constructed.

Mathematical Physics · Physics 2007-05-23 Denis I. Borisov

In the class of the so called non-dynamic Fractional Obstacle Problems of parabolic type, it is shown how to obtain higher regularity as well as optimal regularity of the space derivatives of the solution. Furthermore, at free boundary…

Analysis of PDEs · Mathematics 2016-12-30 Ioannis Athanasopoulos , Luis Caffarelli , Emmanouil Milakis

We consider a quasi-linear parabolic equation with nonlinear dynamic boundary conditions occurring as a natural generalization of the semilinear reaction-diffusion equation with dynamic boundary conditions. The corresponding class of…

Dynamical Systems · Mathematics 2013-02-19 Ciprian G. Gal

In this paper we are concerned with the initial boundary value problems of linear and semi-linear parabolic equations with mixed boundary conditions on non-cylindrical domains in spatial-temporal space. We obtain the existence of a weak…

Analysis of PDEs · Mathematics 2016-11-22 Tujin Kim , Daomin Cao

The question what information is necessary for determination of a unique solution of hydrodynamic equations for ideal fluid is investigated. Arbitrary inviscid flows of the barotropic fluid and of incompressible fluid are considered. After…

General Physics · Physics 2007-05-23 Yuri A. Rylov

We study a simplified Ericksen-Leslie system modeling the flow of nematic liquid crystals with partially free boundary conditions. It is a coupled system between the Navier-Stokes equation for the fluid velocity with a transported heat flow…

Analysis of PDEs · Mathematics 2023-03-22 Fanghua Lin , Yannick Sire , Juncheng Wei , Yifu Zhou

The dynamical equation of the boundary vorticity has been obtained, which shows that the viscosity at a solid wall is doubled as if the fluid became more viscous at the boundary. For certain viscous flows the boundary vorticity can be…

Fluid Dynamics · Physics 2023-08-28 V. Cherepanov , J. Liu , Z. Qian

The parabolic obstacle problem for the fractional Laplacian naturally arises in American option models when the assets prices are driven by pure jump L\'evy processes. In this paper we study the regularity of the free boundary. Our main…

Analysis of PDEs · Mathematics 2016-05-03 Begoña Barrios , Alessio Figalli , Xavier Ros-Oton

We consider a class of Cahn-Hilliard equation with kinetic rate dependent dynamic boundary conditions that describe possible short-range interactions between the binary mixture and the solid boundary. In the presence of surface diffusion on…

Analysis of PDEs · Mathematics 2024-02-08 Maoyin Lv , Hao Wu

The inviscid barotropic quasi-geostrophic equation with a free surface is considered. The free surface mandates a non-standard boundary condition. The global existence existence and uniqueness of a weak solution is established, thanks to…

Analysis of PDEs · Mathematics 2017-08-08 Qingshan Chen

In this paper we present a mathematical analysis for a steady-state laminar boundary layer flow, governed by the Ostwald-de Wael power-law model of an incompressible non- Newtonian fluid past a semi-infinite power-law stretched flat plate…

Classical Physics · Physics 2009-04-03 Mohamed Guedda , Zakia Hammouch

We study an initial boundary value problem on a ball for the heat-conductive system of compressible Navier-Stokes-Fourier equations, in particular, a criterion of breakdown of the classical solution. For smooth initial data away from…

Analysis of PDEs · Mathematics 2015-11-11 Xiangdi Huang

We consider a parabolic non-local free boundary problem that has been derived as a limit of a bulk-surface reaction-diffusion system which models cell polarization. The authors have justified the well-posedness of this problem and have…

Analysis of PDEs · Mathematics 2023-04-24 Anna Logioti , Barbara Niethammer , Matthias Röger , Juan J. L. Velázquez

We prove a local existence theorem for the free boundary problem for a relativistic fluid in a fixed spacetime. Our proof involves an a priori estimate which only requires control of derivatives tangential to the boundary, which holds also…

Analysis of PDEs · Mathematics 2021-09-07 Daniel Ginsberg , Hans Lindblad

We consider an inverse boundary problem for the dynamical Maxwell's equations. We show that the electric permittivity, conductivity, and magnetic permeability can be uniquely determined locally if there is a strictly convex foliation with…

Analysis of PDEs · Mathematics 2025-05-23 Jian Zhai

In this thesis we consider the free surface flow due to a submerged source in a channel of finite depth. This problem has been considered previously in the literature, with some disagreement about whether or not a train of waves exist on…

Fluid Dynamics · Physics 2014-02-18 Holger Paul Keeler
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