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Instabilities at interface of two stream granular flows have been reported in recent experiment [1] that breaking waves can form at the interface between two streams of identical grains flowing on an inclined plane downstream of a splitter…

经典物理 · 物理学 2007-05-23 Hua-Shu Dou , Boo Cheong Khoo , Nhan Phan-Thien

Continuum hydrodynamic models of active liquid crystals have been used to describe dynamic self-organising systems such as bacterial swarms and cytoskeletal gels. A key prediction of such models is the existence of self-stabilising kink…

软凝聚态物质 · 物理学 2009-11-13 S. A. Edwards , J. M. Yeomans

We consider the resonant system of amplitude equations for the conformally invariant cubic wave equation on the three-sphere. Using the local bifurcation theory, we characterize all stationary states that bifurcate from the first two…

数学物理 · 物理学 2018-07-03 P. Bizon , D. Hunik-Kostyra , D. E. Pelinovsky

We study numerically the stability of granular flow on a rough slope in collisional flow regime in the two-dimension. We examine the density dependence of the flowing behavior in low density region, and demonstrate that the particle…

统计力学 · 物理学 2009-11-07 Namiko Mitarai , Hiizu Nakanishi

The linear stability of a shear-thinning, viscoelastic fluid undergoing any of the canonical rectilinear shear flows, viz., plane Couette flow and pressure-driven flow through a channel or a tube is analyzed in the creeping-flow limit using…

流体动力学 · 物理学 2024-08-05 Ramkarn Patne , Shraddha Mandloi , V. Shankar , Ganesh Subramanian

In this paper, we mainly study the mean curvature flow in K\"ahler surfaces with positive holomorphic sectional curvatures. We prove that if the ratio of the maximum and the minimum of the holomorphic sectional curvatures is less than 2,…

微分几何 · 数学 2012-07-24 Jiayu Li , Liuqing Yang

A phenomenological model of parametric surface waves (Faraday waves) is introduced in the limit of small viscous dissipation that accounts for the coupling between surface motion and slowly varying streaming and large scale flows (mean…

斑图形成与孤子 · 物理学 2009-11-10 J. M. Vega , S. Ruediger , J. Vinals

Exact, fully explicit, purely real analytical expressions for the material functions describing steady, startup, and cessation regimes of shear flows and of planar, uniaxial, and biaxial extensional flows of full linear Phan-Thien--Tanner…

流体动力学 · 物理学 2022-01-06 Dimitri Shogin

We study the curve shortening flow on Riemann surfaces with finitely many conformal conical singularities. If the initial curve is passing through the singular points, then the evolution is governed by a degenerate quasilinear parabolic…

微分几何 · 数学 2026-05-28 Nikolaos Roidos , Andreas Savas-Halilaj

We study different dimensional fluids inspired by noncommutative geometry which admit conformal Killing vectors. The solutions of the Einstein field equations examined specifically for five different set of spacetime. We calculate the…

广义相对论与量子宇宙学 · 物理学 2015-04-15 Farook Rahaman , Anirudh Pradhan , Nasr Ahmed , Saibal Ray , Bijan Saha , Mosiur Rahaman

In this article, we review the progress made on the statistical mechanics of liquids and fluids embedded in curved space. Our main focus will be on two-dimensional manifolds of constant nonzero curvature and on the influence of the latter…

统计力学 · 物理学 2015-03-17 Gilles Tarjus , Francois Sausset , Pascal Viot

In this paper we present a characterization of the symmetric rotational periodic gravity water waves of finite depth and without stagnation points in terms of the underlying flow. Namely, we show that such a wave is symmetric and has a…

偏微分方程分析 · 数学 2014-01-24 Bogdan-Vasile Matioc

Steady shearing and planar extension are commonly viewed as two distinct types of flow field, especially in the context of probing the rheology of complex fluids. By leveraging the kinematic equivalence between the two flows, we derive an…

软凝聚态物质 · 物理学 2026-04-14 Nicholas King , Gareth H. McKinley

Given a closed countably $1$-rectifiable set in $\mathbb R^2$ with locally finite $1$-dimensional Hausdorff measure, we prove that there exists a Brakke flow starting from the given set with the following regularity property. For almost all…

微分几何 · 数学 2020-12-10 Lami Kim , Yoshihiro Tonegawa

The flow of viscous fluids is considered as the aggregation of the motion of fluid particles when the fluid is conceived to be made up by an infinite number of particles. As an alternative of this conventional model, fluid motion could be…

流体动力学 · 物理学 2024-02-07 Wennan Zou , Jian He

In this paper, we consider the stability of quermassintegral inequalities along a inverse curvature flow. We choose a special rescaling of the flow such that the $k$-th quermassintegral is decreasing and the $k-1$-th quermassintegral is…

微分几何 · 数学 2022-08-31 Caroline VanBlargan , Yi Wang

We study the constraints imposed by conformal symmetry on the equations of fluid dynamics at second order in gradients of the hydrodynamic variables. At zeroth order conformal symmetry implies a constraint on the equation of state, E=2/3 P,…

高能物理 - 理论 · 物理学 2015-05-30 Jingyi Chao , Thomas Schaefer

In this paper, we investigate steady Euler flows in a two-dimensional bounded domain. By an adaption of the vorticity method, we prove that for any nonconstant harmonic function $q$, which corresponds to a nontrivial irrotational flow,…

偏微分方程分析 · 数学 2019-10-16 Daomin Cao , Guodong Wang , Zhan Weicheng

In this paper we derive a refined asymptotic expansion, near an isolated singularity, for conformally flat metrics with constant positive Q-curvature and positive scalar curvature. The condition that the metric has constant Q-curvature…

微分几何 · 数学 2020-01-23 Jesse Ratzkin

The outflow problem for the viscous full two-phase flow model in a half line is investigated in the present paper. The existence, uniqueness and nonlinear stability of the steady-state are shown respectively corresponding to the supersonic,…

偏微分方程分析 · 数学 2022-07-14 Hai-Liang Li , Shuang Zhao , Han-Wen Zuo
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