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Segregation patterns of size-bidisperse particle mixtures in a fully-three-dimensional flow produced by alternately rotating a spherical tumbler about two perpendicular axes are studied over a range of particle sizes and volume ratios using…

软凝聚态物质 · 物理学 2019-07-03 Mengqi Yu , Paul B. Umbanhowar , Julio M. Ottino , Richard M. Lueptow

Transport processes are considered for their abilities to generate flow in a mixed-phase system of hadrons plus quark-gluon plasma exhibiting temperature and density gradients. Diffusive mechanisms are found to be the leading sources. Even…

高能物理 - 唯象学 · 物理学 2009-11-10 Judith M. Peters , Kevin L. Haglin

Active particles with a temperature distribution, "hot particles", have a distinct effect on the fluid that surrounds them. The temperature gradients they create deem the fluid's viscosity spatially dependent, therefore violating the…

软凝聚态物质 · 物理学 2024-08-27 Osher Arbib , Naomi Oppenheimer

Based upon recent experiments in which Janus particles are made into active swimmers by illuminating them with laser light, we explore the effect of applying a light pattern on the sample, thereby creating activity inducing zones or active…

计算物理 · 物理学 2018-05-24 Jaffar Hasnain , Georg Menzl , Swetlana Jungblut , Christoph Dellago

We present an investigation on effect of the ion-neutral (or ambipolar) diffusion heating rate on thermal phases of a molecular cloud. We use the modeling of ambipolar diffusion with two-fluid smoothed particle hydrodynamics, as discussed…

天体物理学 · 物理学 2008-04-29 M. Nejad-Asghar , D. Molteni

We suggest certain effects, caused by interaction between rotation and gravitation with turbulence structure, for the cooling/heating of dispersed phase of non-isothermal particles in rotating turbulent fluid flows. These effects are…

流体动力学 · 物理学 2015-04-07 R. V. R. Pandya , P. Stansell

If two phases exist at the same time, such as a gas and a liquid, they have the same temperature. This fundamental law of equilibrium physics is known to apply even to many non-equilibrium systems. However, recently, there has been much…

软凝聚态物质 · 物理学 2024-04-19 Lukas Hecht , Iris Dong , Benno Liebchen

Quantum turbulence accompanying thermal counterflow in superfluid $^4$He was recently visualized by the Maryland group, using micron-sized tracer particles of solid hydrogen (J. Phys. Soc. Jpn. {\bf 77}, 111007 (2008)) . In order to…

其他凝聚态物理 · 物理学 2015-06-12 Y. Mineda , M. Tsubota , Y. A. Sergeev , C. F. Barenghi , W. F. Vinen

Compressibility effects in a turbulent transport of temperature field are investigated applying the quasi-linear approach for small P\'eclet numbers and the spectral $\tau$ approach for large P\'eclet numbers. Compressibility of a fluid…

流体动力学 · 物理学 2021-01-27 I. Rogachevskii , N. Kleeorin

The large density of matter in the interaction region of the proton-nucleus or deuteron-nucleus collisions enables the collective expansion of the fireball. Predictions of the hydrodynamic model for the asymmetric transverse flow are…

核理论 · 物理学 2015-06-22 Piotr Bozek , Wojciech Broniowski

Topography evolution of Si(100) surface due to oblique incidence low energy ion beam sputtering (IBS) is investigated. Experiments were carried out at different elevated temperatures from 20$^{\circ}$C to 450$^{\circ}$C and at each…

材料科学 · 物理学 2016-04-08 Debasree Chowdhury , Biswarup Satpati , Debabrata Ghose

We present submillimeter spectral line and dust continuum polarization observations of a remarkable hot core and multiple outflows in the high-mass star-forming region W43-MM1 (G30.79 FIR 10), obtained using the Submillimeter Array (SMA). A…

星系天体物理 · 物理学 2014-03-05 T. K. Sridharan , R. Rao , K. Qiu , P. Cortes , H. Li , T. Pillai , N. A. Patel , Q. Zhang

We perform an analytical investigation of the bifurcation from static to traveling current density filaments in a bistable semiconductor structure with S-shaped current-voltage characteristic. Joule self-heating of a semiconductor structure…

其他凝聚态物理 · 物理学 2009-11-10 Pavel Rodin

Setting up strong Josephson coupling in van der Waals materials in close proximity to superconductors offers several opportunities both to inspect fundamental physics and to develop novel cryogenic quantum technologies. Here we show…

Behavior analogous to a second order phase transition is observed for the homogeneous cooling state of a heavy impurity particle in a granular fluid. The order parameter $\phi $ is the ratio of impurity mean square velocity to that of the…

统计力学 · 物理学 2016-08-16 Andrés Santos , James W. Dufty

The {\it unsteady} process for thermocapillary droplet migration at large Reynolds and Marangoni numbers has been previously reported by identifying a nonconservative integral thermal flux across the surface in the {\it steady}…

流体动力学 · 物理学 2014-07-01 Zuo-Bing Wu

Active particles affect their environment as much as the environment affects their active motion. Here, we present an experimental system where both can be simultaneously adjusted in situ using an external AC electric field. The environment…

The development of thermal boundary layers and plume near a section-triangular roof under different isothermal heating conditions have been the focus of numerous numerical studies. However, flow transition in this type of flow has never…

流体动力学 · 物理学 2024-11-20 Haoyu Zhai , Juan F. Torres , Yongling Zhao , Feng Xu

We numerically investigate the escape kinetics of elliptic Janus particles from narrow two-dimensional cavities with reflecting walls. The self-propulsion velocity of the Janus particle is directed along either their major (prolate) or…

生物物理 · 物理学 2015-06-22 Pulak Kumar Ghosh

We propose a highly feasible technique with no experimental overhead to rapidly cool the in-plane degrees of freedom of large two-dimensional ion crystals in Penning traps. Through simulations, we demonstrate that our approach enables the…

量子物理 · 物理学 2024-03-04 Wes Johnson , Athreya Shankar , John Zaris , John Bollinger , Scott E. Parker