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We consider a three dimensional liquid drop sitting on a rough and chemically heterogeneous substrate. Using a novel minimization technique on the free energy of this system, a generalized Young's equation for the contact angle is found. In…

软凝聚态物质 · 物理学 2007-05-23 P. S. Swain , Reinhard Lipowsky

Gradient, chemically modified, flat surfaces enable directed transport of droplets. Calculation of apparent contact angles inherent for gradient surfaces is challenging even for atomically flat ones. Wetting of gradient, flat solid surfaces…

流体动力学 · 物理学 2018-01-16 Edward Bormashenko

The thermodynamic behavior of a fluid near a vapor-liquid and, hence, asymmetric critical point is discussed within a general ``complete'' scaling theory incorporating pressure mixing in the nonlinear scaling fields as well as corrections…

统计力学 · 物理学 2009-11-07 Young C. Kim , Michael E. Fisher , G. Orkoulas

We consider a liquid drop placed on a smooth homogeneous solid substrate as it spreads from rest to its eventual equilibrium state. The problem is studied numerically in the framework of a model where the contact angle formed by the drop's…

流体动力学 · 物理学 2022-08-18 Carlos A. Galeano-Rios

Hypoelliptic diffusion processes can be used to model a variety of phenomena in applications ranging from molecular dynamics to audio signal analysis. We study parameter estimation for such processes in situations where we observe some…

统计方法学 · 统计学 2007-10-30 Y. Pokern , A. M. Stuart , P. Wiberg

The stability of the equilibrium state is one of the crucial tests a hydrodynamic theory needs to pass. A widespread technique to study this property consists of searching for a Lyapunov function of the linearised theory, in the form of a…

广义相对论与量子宇宙学 · 物理学 2021-09-30 Lorenzo Gavassino

The hydrodynamic phase field model is applied to the problem of film spreading on a solid surface. The disjoining potential, responsible for modification of the fluid properties near a three-phase contact line, is computed from the…

流体动力学 · 物理学 2009-11-06 Len M. Pismen , Yves Pomeau

This paper explores the friction forces encountered by droplets on non-wetting surfaces, specifically focusing on superhydrophobic and superheated substrates. Employing a combination of experimental techniques, including inclined plane…

流体动力学 · 物理学 2024-05-31 Abhijit Kumar Kushwaha , Sankara Arunachalam , Ville Jokinen , Dan Daniel , Tadd T. Truscott

A fluid droplet suspended in an extensional flow of moderate intensity may break into pieces, depending on the amplitude of the initial droplet deformation. In subcritical uniaxial extensional flow the non-breaking base state is linearly…

流体动力学 · 物理学 2018-07-25 Giacomo Gallino , Tobias M. Schneider , François Gallaire

We prove a blow-up criterion in terms of an $L_2$-bound of the curvature for solutions to the curve diffusion flow if the maximal time of existence is finite. In our setting, we consider an evolving family of curves driven by curve…

偏微分方程分析 · 数学 2018-10-18 Helmut Abels , Julia Butz

We study the spreading dynamics of a sphere-shaped elastic non-Newtonian liquid drop on a spherical substrate in the capillary driven regime. We use the simplified Phan Thien Tanner model to represent the rheology of the elastic…

We prove the invariance of the contact angle in liquid-solid wetting phenomena : an electrified droplet is spreading on a solid surface. The drop is minimizing its energy. We express the differential of this energy with respect to the shape…

经典分析与常微分方程 · 数学 2007-07-19 C. Scheid , P. Witomski

Motivated by recent experiments, we extend the Joanny-deGennes calculation of the elasticity of a contact line to an arbitrary contact angle and an arbitrary plate inclination in presence of gravity. This requires a diagonalization of the…

无序系统与神经网络 · 物理学 2015-05-14 Pierre Le Doussal , Kay Joerg Wiese

We consider off-equilibrium dynamics at the critical temperature in a class of glassy system. The off-equilibrium correlation and response functions obey a precise scaling form in the aging regime. The structure of the {\it equilibrium}…

无序系统与神经网络 · 物理学 2013-03-18 Francesco Caltagirone , Giorgio Parisi , Tommaso Rizzo

Wetting of liquid droplets on passive surfaces is ubiquitous in our daily lives, and the governing physical laws are well-understood. When surfaces become active, however, the governing laws of wetting remain elusive. Here we propose…

软凝聚态物质 · 物理学 2023-12-13 Susanne Liese , Xueping Zhao , Christoph A. Weber , Frank Jülicher

We consider infinite-dimensional diffusions where the interaction between the coordinates has a finite extent both in space and time. In particular, it is not supposed to be smooth or Markov. The initial state of the system is Gibbs, given…

数学物理 · 物理学 2013-12-03 Sylvie Roelly , Wioletta Ruszel

The three-phase contact line of a droplet on a smooth surface can be characterized by the Young-Dupr\'e equation. It relates the interfacial energies with the macroscopic contact angle $\theta_e$. On the mesoscale, wettability is modeled by…

流体动力学 · 物理学 2018-07-24 Uwe Thiele , Jacco H. Snoeijer , Sarah Trinschek , Karin John

The main causes of energy dissipation in micro- and nano-scale wetting are viscosity and liquid-solid friction localized in the three-phase contact line region. Theoretical models predict the contactline friction coefficient to correlate…

流体动力学 · 物理学 2024-02-12 Michele Pellegrino , Berk Hess

A self-consistent mean-field method is used to study critical wetting transitions under nonequilibrium conditions by analyzing Kardar-Parisi-Zhang (KPZ) interfaces in the presence of a bounding substrate. In the case of positive KPZ…

统计力学 · 物理学 2009-11-13 F. de los Santos , E. Romera , O. Al Hammal , M. A. Munoz

We demonstrate the approach towards a Gibbs-like equilibrium state, with a common temperature and a chemical potential, of two finite metallic grains, prepared with a different number of noninteracting electrons, connected by a weak link…

介观与纳米尺度物理 · 物理学 2012-10-15 Manas Kulkarni , Kunal L. Tiwari , Dvira Segal