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The problem of a bouncing ball on a non-planar surface is investigated. We discovered that surface undulation adds a horizontal component to the impact force, which acquires a random character. Some aspects of Brownian motion are found in…

混沌动力学 · 物理学 2023-05-03 Ana Laura Boscolo , Valdir Barbosa da Silva Junior , Luiz Antonio Barreiro

Barotropic fluid flows with the same circulation structure as steady flows generically have comoving physical surfaces on which the vortex lines lie. These become Bernoullian surfaces when the flow is steady. When these surfaces are nested…

流体动力学 · 物理学 2023-09-29 Asher Yahalom

Linear and non-linear surface waves on a ferrofluid cylinder surrounding a current-carrying wire are investigated. Suppressing the Rayleigh-Plateau instability of the fluid column by the magnetic field of a sufficiently large current in the…

流体动力学 · 物理学 2009-11-11 D. Rannacher , A. Engel

We reconsider the radial Saffman-Taylor instability, when a fluid injected from a point source displaces another fluid with a higher viscosity in a Hele-Shaw cell, where the fluids are confined between two neighboring flat plates. The…

流体动力学 · 物理学 2014-12-09 Mathias Nagel , François Gallaire

The identification of cells and particles based on their transport properties in microfluidic devices is crucial for numerous applications in biology and medicine. Neutrally buoyant particles transported in microfluidic channels, migrate…

The complicated dynamics of the contact line of a moving droplet on a solid substrate often hamper the efficient modeling of microfluidic systems. In particular, the selection of the effective boundary conditions, specifying the contact…

Predicting the flow of non-Newtonian fluids in porous structure is still a challenging issue due to the interplay betwen the microscopic disorder and the non-linear rheology. In this letter, we study the case of an yield stress fluid in a…

软凝聚态物质 · 物理学 2019-06-26 Chen Liu , Andrea De Luca , Alberto Rosso , Laurent Talon

A geometrically nonlinear continuum mechanical theory is formulated for deformation and failure behaviors of amorphous polymers. The model seeks to capture material response over a range of loading rates, temperatures, and stress states…

材料科学 · 物理学 2026-02-10 John D. Clayton

This paper presents a novel method for evaluating second-order consistent hydrodynamic loads, which employs nonlinear wave and body kinematics. The pseudo-spectral formulation of nonlinear potential flow wave solvers is exploited,…

We outline a general theory for the analysis of flow-distributed standing and travelling wave patterns in one-dimensional, open plug-flows of oscillatory chemical media. We treat both the amplitude and phase dynamics of small and…

斑图形成与孤子 · 物理学 2009-11-10 Patrick N. McGraw , Michael Menzinger

Non-stationary Euler flows of gases are studied. The system of differential equations describing such flows can be represented by means of 2-forms on zero-jet space and we get some exact solutions by means of such a representation.…

数学物理 · 物理学 2020-04-13 Valentin Lychagin , Mikhail Roop

We derive analytical formulas for the wake and wave drag of a disturbance moving arbitrarily at the air-water interface. We show that, provided a constant velocity is reached in finite time, the unsteady surface displacement converges to…

流体动力学 · 物理学 2024-04-05 Lucas Gierczak , Assil Fadle , Maxence Arutkin , Elie Raphaël , Michael Benzaquen

We study the dynamics of the noncommutative fuid in the Snyder space perturbatively at the first order in powers of the noncommutative parameter. The linearized noncommutative fluid dynamics is described by a system of coupled linear…

高能物理 - 理论 · 物理学 2016-11-26 M. C. B. Abdalla , L. Holender , M. A. Santos , I. V. Vancea

In this second part we prove that the full nonlinear fluid-solid system introduced in Part I is stabilizable by deformations of the solid that have to satisfy nonlinear constraints. Some of these constraints are physical and guarantee the…

偏微分方程分析 · 数学 2014-01-06 Sébastien Court

We consider two minimal models of active fluid droplets that exhibit complex dynamics including steady motion, deformation, rotation and oscillating motion. First we consider a droplet with a concentration of active contractile matter…

软凝聚态物质 · 物理学 2016-12-20 Carl A. Whitfield , Rhoda J. Hawkins

A unique pattern selection in the absolutely unstable regime of a driven, nonlinear, open-flow system is analyzed: The spatiotemporal structures of rotationally symmetric vortices that propagate downstream in the annulus of the rotating…

patt-sol · 物理学 2009-10-30 P. Buechel , M. Luecke , D. Roth , R. Schmitz

Many engineering and physiological applications deal with situations when a fluid is moving in flexible tubes with elastic walls. In the real-life applications like blood flow, there is often an additional complexity of vorticity being…

流体动力学 · 物理学 2024-09-09 Rossen Ivanov , Vakhtang Putkaradze

Investigation into the physics of foaming has traditionally been focused on aqueous systems. Non-aqueous foams, by contrast, are not well understood, but have been the subject of a recent surge in interest motivated by the need to manage…

软凝聚态物质 · 物理学 2021-08-25 Suzanne G. K. Calhoun , Vineeth Chandran Suja , Gerald G. Fuller

Nonlinear dynamics of the free surface of an ideal incompressible non-conducting fluid with high dielectric constant subjected by strong horizontal electric field is simulated on the base of the method of conformal transformations. It is…

流体动力学 · 物理学 2018-04-04 Evgeny A. Kochurin

We compute the response matrix for a tracer particle in a compressible fluid with odd viscosity living on a two-dimensional surface. Unlike the incompressible case, we find that an odd compressible fluid can produce an odd lift force on a…

软凝聚态物质 · 物理学 2023-08-30 Ruben Lier , Charlie Duclut , Stefano Bo , Jay Armas , Frank Jülicher , Piotr Surówka