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Mixing and heat transfer rates are typically enhanced when operating at high-pressure transcritical turbulent flow regimes. The rapid variation of thermophysical properties in the vicinity of the pseudo-boiling region can be leveraged to…

流体动力学 · 物理学 2024-09-27 Marc Bernades , Francesco Capuano , Lluis Jofre

Quantum turbulence can be generated in superfluid helium either thermally (by applying a heat flux, as in thermal counterflow) or mechanically (by stirring the liquid). By modelling the superfluid vortex lines as reconnecting space curves…

其他凝聚态物理 · 物理学 2015-06-04 A. W. Baggaley , L. K. Sherwin , C. F. Barenghi , Y. A. Sergeev

We study the effect of surface texture on an overlying turbulent flow for textures made of an alternating slip/no-slip pattern, a common model for superhydrophobic surfaces, but also a particularly simple form of texture. For texture sizes…

流体动力学 · 物理学 2024-12-18 Wenxiong Xie , Chris T Fairhall , Ricardo García-Mayoral

We show that an electro-osmotic flow near the slippery hydrophobic surface depends strongly on the mobility of surface charges, which are balanced by counter-ions of the electrostatic diffuse layer. For a hydrophobic surface with immobile…

流体动力学 · 物理学 2015-04-03 S. R. Maduar , A. V. Belyaev , V. Lobaskin , O. I. Vinogradova

Leidenfrost ratchets are structures with the ability of transporting liquid droplets when heated over the critical Leidenfrost temperature. Once this temperature is reached, the droplet levitates over the surface and moves in the direction…

We study the dynamical regimes of a density-stratified fluid confined between isothermal no-slip top and bottom boundaries (at temperatures $T_t$ and $T_b$) via direct numerical simulation. The thermal expansion coefficient of the fluid is…

流体动力学 · 物理学 2017-09-20 L. -A. Couston , D. Lecoanet , B. Favier , M. Le Bars

Turbulent motions due to flux-driven thermal convection is investigated by numerical simulations and stochastic modelling. Tilting of convection cells leads to the formation of sheared flows and quasi-periodic relaxation oscillations for…

流体动力学 · 物理学 2020-08-26 G. Decristoforo , A. Theodorsen , O. E. Garcia

Phase separation in a complex fluid with lamellar order has been studied in the case of cold thermal fronts propagating diffusively from external walls. The velocity hydrodynamic modes are taken into account by coupling the…

软凝聚态物质 · 物理学 2011-05-18 G. Gonnella , A. Lamura , A. Tiribocchi

The effect of an axial temperature gradient on the flow profile and the induced streaming potential of a pressure-driven symmetric electrolyte in a slit channel is investigated. Based on the non-isothermal Nernst-Planck equations as well as…

流体动力学 · 物理学 2020-06-26 Mathias Dietzel , Steffen Hardt

Plasma jets produced by direct-current (DC) non-transferred arc plasma torches, at the core of technologies ranging from spray coating to pyrolysis, present intricate dynamics due to the coupled interaction of fluid flow, thermal, and…

计算物理 · 物理学 2015-06-15 Juan Pablo Trelles

The stability of a rotating flow in a triaxial ellipsoidal shell with an imposed temperature difference between inner and outer boundaries is studied numerically. We demonstrate that (i) a stable temperature field encourages the tidal…

经典物理 · 物理学 2010-10-01 David Cébron , Pierre Maubert , Michael Le Bars

We present self-similar solutions for advection -dominated accretion flows with thermal conduction in the presence of outflows. Possible effects of outflows on the accretion flow are parametrized and a saturated form of thermal conduction,…

天体物理学 · 物理学 2009-11-13 Mohsen Shadmehri

We investigate the morphodynamics of an ice layer over a turbulent stream of warm water using numerical simulations. At low water speeds, characteristic streamwise undulations appear, which can be explained by the Reynolds analogy between…

流体动力学 · 物理学 2024-06-19 Diego Perissutti , Cristian Marchioli , Alfredo Soldati

High-pressure transcritical fluid flows are central to modern energy and propulsion systems. A key challenge arises in confined configurations, where optimizing performance requires a detailed understanding of the coupled hydrodynamic and…

流体动力学 · 物理学 2026-01-21 M. Bernades , J. M. O. Massey , B. J. McKeon , L. Jofre

We report an idealized numerical study of a melting and freezing solid adjacent to a turbulent, buoyancy-affected shear flow, in order to improve our understanding of topography generation by phase changes in the environment. We use the…

At asymptotically high energies, thermalization in heavy ion collisions can be described via weak-coupling QCD. We present a complete treatment of how thermalization proceeds, at the parametric weak-coupling level. We show that plasma…

高能物理 - 唯象学 · 物理学 2011-12-15 Aleksi Kurkela , Guy D. Moore

Results of direct numerical simulations (DNS) of porous-wall turbulent flows in open channels with conjugate heat transfer are reported in this work. For the conductive porous walls considered here, the change in heat transfer is not…

流体动力学 · 物理学 2025-07-15 Seyed Morteza Habibi Khorasani , Geert Brethouwer , Shervin Bagheri

Drag for wall-bounded flows is directly related to flux of spanwise vorticity outward from the wall. In turbulent flows a key contribution arises from cross-stream "vorticity cascade" by nonlinear advection and stretching of vorticity. We…

流体动力学 · 物理学 2023-11-23 Samvit Kumar , Charles Meneveau , Gregory Eyink

Rapidity-odd directed flow in heavy ion collisions can originate from two very distinct sources in the collision dynamics i. an initial tilt of the fireball in the reaction plane that generates directed flow of the constituents independent…

核理论 · 物理学 2019-10-09 Sandeep Chatterjee , Piotr Bozek

When an electrically charged system is subjected to the action of an electromagnetic field, it responds by generating an electrical current. In the case of a multicomponent plasma other effects, the so called cross effects, influence the…

天体物理学 · 物理学 2015-06-24 L. S. Garcia-Colin , A. L. Garcia-Perciante , A. Sandoval-Villalbazo