Physical Review E
Characterizing the impact of particle behavior at fracture intersections in three-dimensional discrete fracture networks
Author(s): Thomas Sherman, Jeffrey D. Hyman, Diogo Bolster, Nataliia Makedonska, and Gowri Srinivasan
We characterize the influence of different intersection mixing rules for particle tracking simulations on transport properties through three-dimensional discrete fracture networks. It is too computationally burdensome to explicitly resolve all fluid dynamics within a large three-dimensional fracture...
[Phys. Rev. E 99, 013110] Published Fri Jan 25, 2019
Multiple eigenmodes of the Rayleigh-Taylor instability observed for a fluid interface with smoothly varying density. II. Asymptotic solution and its interpretation
Author(s): Ming Dong, Zhengfeng Fan, and Chengxin Yu
It was observed in the first part of this work [C. X. Yu et al., Phys. Rev. E 97, 013102 (2018)] that a Rayleigh-Taylor flow with a smoothly varying density at the interface permits a multiplicity of solutions for instability modes. Based on numerical solutions of the eigenvalue problem, a fitting ...
[Phys. Rev. E 99, 013109] Published Thu Jan 24, 2019
Author(s): P. Urban, P. Hanzelka, T. Králík, M. Macek, V. Musilová, and L. Skrbek
By using cryogenic He4 gas as the working fluid in a cylindrical cell 0.3 m in both height and diameter, we study the influence of non-Oberbeck-Boussinesq (NOB) effects on the heat transfer in turbulent Rayleigh-Bénard convection (RBC). We show that the NOB effects increase the heat transfer efficie...
[Phys. Rev. E 99, 011101(R)] Published Wed Jan 23, 2019
Author(s): Linfeng Jiang, Chao Sun, and Enrico Calzavarini
We investigate the dependency of the magnitude of heat transfer in a convection cell as a function of its inclination by means of experiments and simulations. The study is performed with a working fluid of large Prandtl number, Pr≃480, and at Rayleigh numbers Ra≃108 and Ra≃5×108 in a quasi-two-dimen...
[Phys. Rev. E 99, 013108] Published Tue Jan 22, 2019
Self-consistent feedback mechanism for the sudden viscous dissipation of finite-Mach-number compressing turbulence
Author(s): Alejandro Campos and Brandon E. Morgan
Previous work [Davidovits and Fisch, Phys. Rev. Lett. 116, 105004 (2016)] demonstrated that the compression of a turbulent field can lead to a sudden viscous dissipation of turbulent kinetic energy (TKE), and that paper suggested this mechanism could potentially be used to design new fast-ignition s...
[Phys. Rev. E 99, 013107] Published Thu Jan 17, 2019
Author(s): Hiroyoshi Nakano and Shin-ichi Sasa
We study boundary conditions applied to the macroscopic dynamics of Newtonian liquids from the view of microscopic particle systems. We assume the existence of microscopic boundary conditions that are uniquely determined from a microscopic description of the fluid and the wall. By using molecular dy...
[Phys. Rev. E 99, 013106] Published Mon Jan 14, 2019
Author(s): Laura Stricker and Hans Christian Öttinger
In relativistic fluid mechanics, positive entropy production is known to be insufficient for guaranteeing stability. Much stronger criteria for thermodynamic admissibility have become available in nonequilibrium thermodynamics. We here perform a linear stability analysis for a model of relativistic ...
[Phys. Rev. E 99, 013105] Published Thu Jan 10, 2019
Author(s): Ioannis W. Kokkinakis, Dimitris Drikakis, and David L. Youngs
Turbulence mixing models of different degree of complexity are investigated for Rayleigh-Taylor mixing flows with reference to high-resolution implicit large eddy simulations. The models considered, in order of increasing complexity, comprise the (i) two-equation K-L, (ii) three-equation K-L-a, (iii...
[Phys. Rev. E 99, 013104] Published Wed Jan 09, 2019
Author(s): Shenfei Liao, Wenbin Zhang, Hu Chen, Liyong Zou, Jinhong Liu, and Xianxu Zheng
The evolution of a uniform interface subjected to a perturbed shock wave has been experimentally studied over a range of Atwood numbers 0.22≤A≤0.68 and Mach numbers 1.2≤M≤1.8 using a vertical shock tube. The perturbed shock wave is produced by diffracting a planar incident shock over a rigid cylinde...
[Phys. Rev. E 99, 013103] Published Tue Jan 08, 2019
Water vapor diffusive transport in a smectite clay: Cationic control of normal versus anomalous diffusion
Author(s): Leander Michels, Yves Méheust, Mario A. S. Altoé, Éverton C. dos Santos, Henrik Hemmen, Roosevelt Droppa, Jr., Jon O. Fossum, and Geraldo J. da Silva
The transport of chemical species in porous media is ubiquitous in subsurface processes, including contaminant transport, soil drying, and soil remediation. We study vapor transport in a multiscale porosity material, a smectite clay, in which water molecules travel in mesopores and macropores betwee...
[Phys. Rev. E 99, 013102] Published Mon Jan 07, 2019
Fully resolved array of simulations investigating the influence of the magnetic Prandtl number on magnetohydrodynamic turbulence
Author(s): Mairi E. McKay, Arjun Berera, and Richard D. J. G. Ho
We explore the effect of the magnetic Prandtl number Pm on energy and dissipation in fully resolved direct numerical simulations of steady-state, mechanically forced, homogeneous magnetohydrodynamic turbulence in the range 1/32<Pm<32. We compare the spectra and show that if the simulations are...
[Phys. Rev. E 99, 013101] Published Fri Jan 04, 2019