Article
Physics, Multidisciplinary
Eli Chertkov, Benjamin Villalonga, Bryan K. Clark
Summary: The study shows the existence of many-body localization phenomena in quantum systems in higher dimensions, and an algorithm has been developed to search for approximate binary l bits. The algorithm successfully identified high-quality l bits in different models, and observed rapid changes in the distribution of l bits at specific disorder strengths, suggesting the presence of MBL transitions.
PHYSICAL REVIEW LETTERS
(2021)
Article
Meteorology & Atmospheric Sciences
Rainer V. J. Hilland, Christian Bernhofer, May Bohmann, Andreas Christen, Marwan Katurji, Gillian Maggs-Kolling, Matthias Krauss, Jarl A. Larsen, Eugene Marais, Andrea Pitacco, Benjamin Schumacher, Robert Spirig, Nadia Vendrame, Roland Vogt
Summary: The Namib Turbulence Experiment aimed to investigate heat transfer between subsurface, surface, and atmosphere in the Namib Desert, using a variety of instruments to measure temperature fluctuations and other variables. The experiment revealed the spatial and temporal patterns of heat exchange in the desert, providing valuable insights for weather forecasting and climate modeling.
BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY
(2022)
Article
Physics, Multidisciplinary
Guoquan Yang, Siyu Xie, Yan Zhao, Jingjing Jin, Suying Zhang
Summary: We studied the dynamics of ring dark solitons in a two-dimensional dipolar Bose-Einstein condensate and found that the effect of dipolar interaction on the soliton dynamics is different from that in a non-dipolar condensate. The dipolar interaction can induce collapse of shallow ring dark solitons and the formation of vortex-antivortex pairs. When the dipolar atoms are oriented non-vertically to the condensate, the solitons shrink to an elliptical configuration and decay into lump solitons or vortex-antivortex pairs, with phenomena such as vortex recombination, annihilation, oblique collisions, and catching up.
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2023)
Article
Optics
Younghoon Lim, Junhong Goo, Haneul Kwak, Y. Shin
Summary: A large-area Rb-87 Bose-Einstein condensate was successfully produced using a non-Gaussian optical dipole trap (ODT) with elongated and flattened geometry. The atom density of the condensate is uniform within 10% over 1000 healing lengths in the central region, which facilitates vortex shedding experiments.
Article
Mathematics, Applied
Marcos A. G. dos Santos Filho, Francisco E. A. dos Santos
Summary: This article presents a method for obtaining statistical quantities of the velocity field in superfluids using the Weak Wave Turbulence (WWT) theory. By introducing an auxiliary wavefunction, a simpler description of the velocity field is achieved, allowing for the extraction of the incompressible energy spectrum.
PHYSICA D-NONLINEAR PHENOMENA
(2022)
Article
Psychology, Multidisciplinary
Ming Zhang
Summary: The study examines the distinction between individual's propensity to trust and their perception of others' trustworthiness through a proposed two-dimensional trust measure. The findings suggest that the new trust measure has discriminant validity and effectively differentiates between the two components of trust.
FRONTIERS IN PSYCHOLOGY
(2021)
Article
Mechanics
Brodie C. Pearson, Jenna L. Pearson, Baylor Fox-Kemper
Summary: The study proposes new relations to diagnose energy and enstrophy dissipation rates in anisotropic two-dimensional turbulence, using second-order advective structure functions. These new relations show improvement over existing methods through increased accuracy, insensitivity to sampling direction, and lower temporal and spatial variability. Advective structure functions have benefits under weakly anisotropic conditions, becoming increasingly important as third-order structure functions become inappropriate.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Mechanics
Erik Lindborg, Arne Nordmark
Summary: This study conducts a spectral analysis of a non-divergent flow on a sphere based on Fjortoft's method. It demonstrates that the spherical harmonic energy spectrum remains invariant under rotations of the polar axis, and derives the spectral energy equation and energy transfer relations. The importance of exploring two-dimensional turbulence through simulations using spherical geometry is highlighted, based on the explanation of relevant theories and hypotheses.
JOURNAL OF FLUID MECHANICS
(2022)
Review
Physics, Multidisciplinary
Ayan Khan, Argha Debnath
Summary: The study of Bose-Einstein condensation (BEC) in lower dimensions is important for understanding many-body physics. Recently, a liquid-like state in a BEC mixture was observed in lower dimensions, which has significant implications for our understanding of the liquid state.
FRONTIERS IN PHYSICS
(2022)
Article
Engineering, Multidisciplinary
Jawed Mustafa, M. M. Abdullah, Mohammad Zaki Ahmad, Shahid Husain, Mohsen Sharifpur
Summary: This article presents a simulation of the turbulent flow of alumina/water nanofluid in a heatsink using the finite element method. The study focuses on the cooling of LEDs using a circular heatsink, with multiple LEDs placed under the heatsink. By varying the distance between the LEDs, the connection part dimensions, and the inlet velocity of the nanofluid, the heatsink temperature and the outlet temperature of the nanofluid are determined. The results show that changing the nanofluid velocity has the greatest impact on the heatsink's average temperature.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2023)
Article
Materials Science, Multidisciplinary
Maxim Trushin
Summary: In this study, an explicitly solvable model is developed to determine an interlayer separation that is strong enough to prevent electron and hole hopping, while still allowing for sufficient electron-hole pairing to achieve an interlayer excitonic insulator state.
Article
Mechanics
C. Chen, L. He
Summary: Recent findings on wall-bounded turbulence have led to the development of a new modelling method to capture the influence of large-scale coherent structures and scale-interaction on near-wall turbulence. This paper presents a two-scale approach to simulate this influence and validates its effectiveness.
JOURNAL OF FLUID MECHANICS
(2022)
Article
Mechanics
Xander M. de Wit, Adrian van Kan, Alexandros Alexakis
Summary: In this study, direct numerical simulations of thin-layer flow were used to investigate whether the bistable range survives as the domain size and turbulence intensity are increased. The research found that the bistable range grows as the box size and/or Reynolds number Re are increased.
JOURNAL OF FLUID MECHANICS
(2022)
Editorial Material
Physics, Fluids & Plasmas
Dhawal Buaria, Katepalli R. Sreenivasan
Summary: The study investigates the characteristics of passive scalars under a uniform mean gradient. The results indicate that at high Reynolds and Schmidt numbers, the statistics of scalar and velocity fluctuations behave similarly. However, previous data did not consider higher Schmidt numbers. By including these data, it is demonstrated that the differences between velocity and scalar statistics persist at all Reynolds and Schmidt numbers.
PHYSICAL REVIEW FLUIDS
(2023)
Article
Mechanics
Jin-Han Xie, Shi-Di Huang
Summary: Through simulations of an idealized isotropic convection system, we provide evidence for the existence of Bolgiano-Obukhov (BO) scaling in Rayleigh-Benard convection (RBC) and establish its association with the inverse kinetic energy cascade. We also observe strong intermittent effects in the buoyancy field, but not in the velocity.
JOURNAL OF FLUID MECHANICS
(2022)
