Article
Mechanics
V. V. Konovalov, D. Lyubimov, T. P. Lyubimova
Summary: The study focuses on resonance oscillations of a single liquid drop or gas bubble relative to their equilibrium spherical shape, investigating the effect of viscosity on resonance and revealing the equivalence of two methods in accounting for viscosity.
Article
Chemistry, Physical
Arghyadeep Paul, N. R. Aluru
Summary: The study investigates the impact of nonlocal shear stress on gravity-driven isothermal flow in nanochannels under strong confinement. The local average density model is used and the fluid's viscosity kernel is estimated using the sinusoidal transverse force method. A continuum model is proposed to solve the nonlocal hydrodynamics problem and its solutions are qualitatively compared with the results of non-equilibrium molecular dynamics simulations.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Wei-Jie Ji, Shu-Yu Zheng, Li Lu, Kai Chang, Chi Zhang
Summary: In our quantum transport study of Hall viscous liquid in high-mobility 2DES, we found that the occurrence of negative resistance is inversely proportional to the adjacent Hallbar arm distance, and is dependent on the characteristic lengths of the devices and electron flow direction under magnetic fields. Additionally, high-order minimal resistances persist in a large sample size of L = 5 μm, expanding to magnetic fields of several kGs.
Article
Physics, Multidisciplinary
Aydin Cem Keser, Daisy Q. Wang, Oleh Klochan, Derek Y. H. Ho, Olga A. Tkachenko, Vitaly A. Tkachenko, Dimitrie Culcer, Shaffique Adam, Ian Farrer, David A. Ritchie, Oleg P. Sushkov, Alexander R. Hamilton
Summary: Fluid dynamics plays a crucial role in electron transport in solids, transforming electron motion from independent particles to a viscous electron fluid. By modifying device geometry and eliminating unknown parameters, the true intrinsic hydrodynamic properties of the electron system can be revealed.
Article
Engineering, Chemical
Jorge H. Sanchez, Francisco J. Rubio-Hernandez, Nicolas M. Paez-Flor
Summary: The study reveals that the suspension of 12.5 vol% hydrophobic fumed silica (Aerosil(R) R816) in low molecular weight polypropylene glycol (PPG400) exhibits shear thickening and shear thinning behaviors, with transient increments and instantaneous jamming properties.
Article
Physics, Nuclear
Dananjaya Liyanage, Ozge Surer, Matthew Plumlee, Stefan M. Wild, Ulrich Heinz
Summary: Due to large pressure gradients in early relativistic heavy-ion collisions, standard hydrodynamic model simulations become reliable only after a certain period of time. In order to address this issue, a prehydrodynamic stage can be introduced to model the early evolution microscopically. Alternatively, the recently developed viscous anisotropic hydrodynamics (VAH) can be used to handle fluids with large anisotropic pressure gradients. This study presents a Bayesian calibration of the VAH model using experimental data from Pb-Pb collisions, demonstrating its unique capability to constrain the specific viscosities of the quark-gluon plasma at higher temperatures compared to other models previously used.
Article
Physics, Fluids & Plasmas
Yuto Hosaka, Shigeyuki Komura, David Andelman
Summary: We discuss the linear hydrodynamic response of a two-dimensional active chiral compressible fluid with odd viscosity, resulting in the odd viscosity-dependent mobility tensor. Furthermore, we demonstrate that a finite-size disk moving laterally in the 2D fluid experiences a nondissipative lift force in addition to the dissipative drag force.
Article
Mathematics, Applied
Lili Fan, Kaiqiang Li
Summary: This paper studies the behavior of solutions for the 1D radiation hydrodynamic limit model without viscosity in large time, as well as the asymptotic stability of the viscous contact discontinuity wave under the assumption of small strength of the contact wave and initial perturbations. The presence of a fourth-order term in the pressure related to the absolute temperature from radiation effect poses the main difficulty, and the lack of viscosity weakens the dissipativeness of the system. The proof is mainly based on the energy method, including normal and radial directions energy estimates.
NONLINEAR ANALYSIS-REAL WORLD APPLICATIONS
(2023)
Article
Physics, Nuclear
Ghulam Bary, Wei-Ning Zhang, Peng Ru, Jing Yang
Summary: The study reveals that the intercepts of multi-pion Bose-Einstein correlation functions for granular sources with coherent pion-emission droplets are sensitive to the number of droplets, decreasing with the droplet number. While the model results for the three-pion correlation function generally agree with experimental data, there is inconsistency for the four-pion correlation function. Investigations into normalized multi-pion correlation functions show an interesting enhancement of the normalized four-pion correlation function in the moderate relative-momentum region.
Article
Physics, Particles & Fields
Mubarak Alqahtani, Michael Strickland
Summary: Based on experimental data, 3+1D quasiparticle anisotropic hydrodynamics can well describe bulk observables in 5.02 TeV Pb-Pb collisions, especially showing excellent descriptive capability for the momentum dependence of K/pi and p/pi ratios in the 0-5% centrality class reported by the ALICE collaboration.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Astronomy & Astrophysics
Snigdha Ghosh, Sabyasachi Ghosh
Summary: The study derives the expressions of shear and bulk viscosities for hot charged scalar bosons and Dirac fermions in the presence of an external magnetic field using the one-loop Kubo formalism. It finds a rich quantum field theoretical structure in the viscous coefficients' equations under nonzero magnetic field, which differ from previous kinetic-theory-based calculations. However, in the absence of magnetic field, the results from one-loop Kubo and kinetic-theory-based expressions for viscosities are identical.
Article
Engineering, Chemical
Pengfei Guo, Shengyang Tao
Summary: In this study, a foldable reactor based on the art of origami is designed to generate chiral shear-free chaotic convection, which greatly improves the mixing efficiency of high-viscosity fluids. Finite element analysis and image analysis were conducted to evaluate the mixing performance of the reactor. The chiral structure increases the freedom of movement of the reactor, driving the generation of complex vortices in high-viscosity fluids, and the vertical eddying movements significantly enhance the mixing process. Therefore, highly viscous fluids can be well mixed in a short time without any dead zone using the chiral origami structure, which shows great potential for fabricating functional chemical engineering systems.
Article
Physics, Multidisciplinary
Jorge Noronha, Michal Spalinski, Enrico Speranza
Summary: This study presents a new theory of second-order viscous relativistic hydrodynamics without imposing frame conditions on the choice of hydrodynamic variables, and explicitly provides conditions for causality and stability in the conformal regime. By considering Bjorken flow solutions, variables that make a hydrodynamic attractor manifest are identified.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Nuclear
Bing-feng Jiang, Shao-wu Shi, De-fu Hou, Jia-rong Li
Summary: This study investigates the color-electric conductivity of the quark-gluon plasma (QGP) in the presence of shear viscosity, focusing on the connection between charge transport and momentum transport. The research shows that shear viscosity has a significant impact on real and imaginary parts of the color-electric conductivity in certain frequency regions.
Article
Mechanics
Changhun Park, Jeong-Hyun Kim
Summary: This study investigates the bouncing dynamics of glycerol/water droplets impacting a grooved hydrophobic surface by changing the viscosity and impact speed of the droplets. It found that as the viscosity of the droplets increased, the Weber number range in which petal bouncing occurred decreased.
