{"title":"A Regularity Criterion for the Angular Component of Velocity in the norm (L_q(0,T;L_p(Omega )),;frac{3}{p} +frac{2}{q}<1,;q< infty ), in Axisymmetric Navier-Stokes Equations in a Cylinder","authors":"Wiesław J. Grygierzec, Wojciech M. Zaja̧czkowski","doi":"10.1007/s00021-026-01022-9","DOIUrl":"10.1007/s00021-026-01022-9","url":null,"abstract":"<div><p>We consider the axisymmetric Navier-Stokes equations in a finite cylinder <span>(Omega subset mathbb {R}^3)</span>. We assume that <span>(v_r)</span>, <span>(v_varphi )</span>, <span>(omega _varphi )</span> vanish on the lateral part of boundary <span>(partial Omega )</span> of the cylinder, and that <span>(v_z)</span>, <span>(omega _varphi )</span>, <span>(partial _zv_varphi )</span> vanish on the top and bottom parts of the boundary <span>(partial Omega )</span>, where we used standard cylindrical coordinates, and we denoted by <span>(omega =operatorname {curl}v)</span> the vorticity field. We use <span>(H^3)</span> Sobolev estimates for the modified stream function (stream function divided by radius) and energy type estimates for gradient of swirl to derive two order reduction estimates. Finally, using the estimate </p><div><div><span>$$ Vert v_varphi Vert _{L_q(0,T;L_p(Omega ))} le A, $$</span></div></div><p>where <i>A</i> is a given number and <span>(frac{3}{p} + frac{2}{q} < 1)</span>, <span>(q<infty )</span> we prove the existence of global regular axially-symmetric solutions.</p></div>","PeriodicalId":649,"journal":{"name":"Journal of Mathematical Fluid Mechanics","volume":"28 3","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00021-026-01022-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148281172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Global Existence and Blow-Up for the Euler-Poincaré Equations with a Class of Initial Data","authors":"Jinlu Li, Yanghai Yu, Weipeng Zhu","doi":"10.1007/s00021-026-01035-4","DOIUrl":"10.1007/s00021-026-01035-4","url":null,"abstract":"<div><p>In this paper we investigate the Cauchy problem of d-dimensional Euler-Poincaré equations. By choosing a class of new and special initial data, we can transform this d-dimensional Euler-Poincaré equations into the Camassa-Holm type equation in the real line. We first obtain some global existence results and then present a new blow-up result to the system under some different assumptions on this special class of initial data.</p></div>","PeriodicalId":649,"journal":{"name":"Journal of Mathematical Fluid Mechanics","volume":"28 3","pages":""},"PeriodicalIF":1.3,"publicationDate":"2026-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148236567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Local Well-Posedness for Barotropic Compressible Fluid–Viscoelastic Shell Interactions","authors":"Pierre Marie Ngougoue Ngougoue","doi":"10.1007/s00021-026-01031-8","DOIUrl":"10.1007/s00021-026-01031-8","url":null,"abstract":"<div><p>We study a three-dimensional barotropic compressible Navier–Stokes flow interacting with a viscoelastic shell that occupies a portion of the fluid boundary. The analysis is entirely Eulerian and the moving interface is parametrised by a localised Hanzawa transform supported near the shell patch, which preserves the transport structure of the continuity equation and avoids a global Lagrangian map. We prove local-in-time existence and uniqueness of strong solutions for compatible data and without imposing a vanishing initial shell displacement. The proof combines a well-posedness theory for the continuity equation, solved by the method of characteristics in the Hanzawa frame, with an analysis of the momentum–structure subproblem carried out by the classical linearisation–energy estimate–fixed-point scheme on a fixed reference domain. A Banach fixed point then couples the two steps and closes the argument on a short time interval. We work with a viscosity-weighted energy that makes the scaling in the shear and bulk viscosities explicit. This yields bounds whose constants grow at most linearly in these parameters. In particular, the estimates are inviscid-limit compatible. The result complements the global finite-energy weak theory for compressible fluid–shell interaction by providing a local strong well-posedness statement in the same geometric configuration. It also extends strong boundary results beyond beams and plates to bending shells, and addresses the wave-to-bending direction suggested in the literature on compressible fluid–structure interaction at structural boundaries, while remaining fully Eulerian.</p></div>","PeriodicalId":649,"journal":{"name":"Journal of Mathematical Fluid Mechanics","volume":"28 3","pages":""},"PeriodicalIF":1.3,"publicationDate":"2026-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00021-026-01031-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148236608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Vanishing Viscosity Limit for the Compressible Navier-Stokes Equations with Non-Linear Density Dependent Viscosities","authors":"Luca Bisconti, Matteo Caggio, Filippo Dell’Oro","doi":"10.1007/s00021-026-01030-9","DOIUrl":"10.1007/s00021-026-01030-9","url":null,"abstract":"<div><p>In a three-dimensional bounded domain <span>(Omega )</span> we consider the compressible Navier-Stokes equations for a barotropic fluid with general non-linear density dependent viscosities and no-slip boundary conditions. A nonlinear drag term is added to the momentum equation. We establish two conditional Kato-type criteria for the convergence of the weak solutions to such a system towards the strong solution of the compressible Euler system when the viscosity coefficient and the drag term parameter tend to zero.</p></div>","PeriodicalId":649,"journal":{"name":"Journal of Mathematical Fluid Mechanics","volume":"28 3","pages":""},"PeriodicalIF":1.3,"publicationDate":"2026-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00021-026-01030-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148236596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Some Rigorous Remarks on Migdal’s Momentum Loop Equation","authors":"Elia Brué, Camillo De Lellis","doi":"10.1007/s00021-026-01023-8","DOIUrl":"10.1007/s00021-026-01023-8","url":null,"abstract":"<div><p>We give a rigorous mathematical treatment of some portions of the theory developed by Alexander Migdal on the momentum loop equation.</p></div>","PeriodicalId":649,"journal":{"name":"Journal of Mathematical Fluid Mechanics","volume":"28 3","pages":""},"PeriodicalIF":1.3,"publicationDate":"2026-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148172421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Mathematical Justification of a Baer–Nunziato Model for a Compressible Viscous Fluid with Phase Transition","authors":"Christian Rohde, Florian Wendt","doi":"10.1007/s00021-026-01028-3","DOIUrl":"10.1007/s00021-026-01028-3","url":null,"abstract":"<div><p>In this work, we justify a Baer–Nunziato system including appropriate closure terms as the macroscopic description of a compressible viscous fluid that can occur in a liquid or a vapor phase in the isothermal framework. As a mathematical model for the two-phase fluid on the detailed scale we chose a non-local version of the Navier–Stokes–Korteweg equations in the one-dimensional and periodic setting. Our justification relies on anticipating the macroscopic description of the two-phase fluid as the limit system for a sequence of solutions with highly oscillating initial densities. Interpreting the density as a parametrized measure, we extract a limit system consisting of a kinetic equation for the parametrized measure and a momentum equation for the velocity. Under the assumption that the initial density distributions converge in the limit to a convex combination of Dirac-measures, we show by a uniqueness result that the parametrized measure also has to be a convex combination of Dirac-measures and, that the limit system reduces to the Baer–Nunziato system. This work extends existing results concerning the justification of Baer–Nunziato models as the macroscopic description of multi-fluid models in the sense, that we allow for phase transition effects on the detailed scale. This work also includes a new global-in-time well-posedness result for the Cauchy problem of the non-local Navier–Stokes–Korteweg equations.</p></div>","PeriodicalId":649,"journal":{"name":"Journal of Mathematical Fluid Mechanics","volume":"28 3","pages":""},"PeriodicalIF":1.3,"publicationDate":"2026-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00021-026-01028-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148173471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Weak Solutions for a Dense Granular Model with Drucker-Prager Plasticity and Bagnold Viscosity Scaling","authors":"Laurent Chupin, Thierry Dubois","doi":"10.1007/s00021-026-01029-2","DOIUrl":"10.1007/s00021-026-01029-2","url":null,"abstract":"<div><p>This article addresses the existence of solutions for partial differential equation (PDE) models describing granular flows. We emphasize the essential role of flow dilatation, coupled with complex rheology, in ensuring both stability and the existence of dissipative energy. A central focus of the paper is to understand how this energy, arising from strongly nonlinear and singular terms, contributes to the existence of weak solutions. We first establish an existence result for a model that reflects some mathematical difficulties of the complete system. In particular, the dilatancy law describes local volume changes in terms of the velocity divergence, which depends on the shear rate and the square root of the pressure, reflecting a balance between these two quantities. While the model rigorously studied in this article does not address all the difficulties of the full physical model - specifically, the variable volume fraction case is handled here solely through regularisation - this work represents a significant step forward in the mathematical analysis of models for such complex flows.</p></div>","PeriodicalId":649,"journal":{"name":"Journal of Mathematical Fluid Mechanics","volume":"28 3","pages":""},"PeriodicalIF":1.3,"publicationDate":"2026-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148010080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Wave breaking for the Fornberg-Whitham-Degasperis-Procesi equation","authors":"Runjie Han, Jian Li, Shaojie Yang","doi":"10.1007/s00021-026-01020-x","DOIUrl":"10.1007/s00021-026-01020-x","url":null,"abstract":"<div><p>In this paper, we investigate wave breaking for the Fornberg-Whitham-Degasperis-Procesi equation which can be viewed as a special shallow water wave equation. Without any conservation laws, we give sufficient conditions on the initial data to lead to wave breaking.</p></div>","PeriodicalId":649,"journal":{"name":"Journal of Mathematical Fluid Mechanics","volume":"28 2","pages":""},"PeriodicalIF":1.3,"publicationDate":"2026-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147796330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Well-Posedness of a Generalized Stokes Operator on Smooth Bounded Domains via Layer-Potentials","authors":"Mirela Kohr, Victor Nistor, Wolfgang L. Wendland","doi":"10.1007/s00021-026-01021-w","DOIUrl":"10.1007/s00021-026-01021-w","url":null,"abstract":"<div><p>We prove the invertibility of the relevant single and double layer potentials associated to some generalizations of the Stokes operator on bounded domains. In order to do that, we first develop an “algebra tool kit” to deal with limit and jump relations of layer operators. We do that first on <span>(mathbb {R}^{n})</span> for operators acting on a distribution supported on <span>({x_{n} = 0})</span> and then in general on (possibly non-compact) manifolds. We use these results to study the limit and jump relations of the layer potential operators associated to our generalized Stokes operators. As an application, we obtain well-posedness results for the Stokes system.</p></div>","PeriodicalId":649,"journal":{"name":"Journal of Mathematical Fluid Mechanics","volume":"28 2","pages":""},"PeriodicalIF":1.3,"publicationDate":"2026-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00021-026-01021-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147738338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Gilles A Francfort, Alessandro Giacomini, Scott Weady
{"title":"Velocity Optimization of Self-Equilibrated Obstacles in A Two-Dimensional Viscous Flow","authors":"Gilles A Francfort, Alessandro Giacomini, Scott Weady","doi":"10.1007/s00021-026-01017-6","DOIUrl":"10.1007/s00021-026-01017-6","url":null,"abstract":"<div><p>An obstacle is immersed in an externally driven 2D Stokes or Navier-Stokes fluid. We study the self-equilibration conditions for that obstacle under steady state assumptions on the flow. We then seek to optimize the translational and/or angular velocity of the obstacle by varying its shape. To allow general variations, we must consider a very large class of obstacles for which the notion of trace is meaningless. This forces us to revisit the notion of self-equilibration for both Stokes and Navier-Stokes in a measure theoretic environment.</p></div>","PeriodicalId":649,"journal":{"name":"Journal of Mathematical Fluid Mechanics","volume":"28 2","pages":""},"PeriodicalIF":1.3,"publicationDate":"2026-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147738111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}