Article
Astronomy & Astrophysics
Claudio Meringolo, Alejandro Cruz-Osorio, Luciano Rezzolla, Sergio Servidio
Summary: This study investigates the microphysical properties of astrophysical plasmas near accreting compact objects through two-dimensional kinetic particle-in-cell simulations of special-relativistic turbulence. The analysis includes the index of electron energy distributions kappa, the efficiency of nonthermal particle production epsilon, and the temperature ratio Te/Tp, and provides fitting functions that describe their behavior in different parameter spaces.
ASTROPHYSICAL JOURNAL
(2023)
Article
Chemistry, Physical
Egor V. Yakovlev, Nikita P. Kryuchkov, Sofia A. Korsakova, Nikita A. Dmitryuk, Pavel V. Ovcharov, Mihail M. Andronic, Ilya A. Rodionov, Andrei V. Sapelkin, Stanislav O. Yurchenko
Summary: Many-body forces play a crucial role in the structure and dynamics of matter, but their understanding is limited by experimental challenges. A novel experimental system based on rotating electric fields allows precise control over many-body interactions between colloidal silica particles, revealing the critical influence of three-body interactions on phase diagram boundaries and the reversibility of phase transitions controlled by the external electric field magnitude.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Meteorology & Atmospheric Sciences
Wahiba Lfarh, Florian Pantillon, Jean-Pierre Chaboureau
Summary: This study investigates the transport of strong winds to the surface in the Mediterranean windstorm Adrian. It finds that convective rolls play a crucial role in this process, while kilometer-scale simulations tend to overestimate surface winds due to the lack of resolution for convective rolls.
MONTHLY WEATHER REVIEW
(2023)
Article
Engineering, Civil
A. Ricci, R. Vasaturo, B. Blocken
Summary: The expanding capacity of seaports for worldwide competitiveness is increasing risk exposure due to larger wind forces caused by increasing ship size. The current alert system for port operations suspension based on wind conditions is unreliable due to limited sensor locations. Real-time prediction of local wind conditions in seaports is still challenging despite safety management efforts. This paper aims to develop an integrated tool using computational fluid dynamics to transfer measured wind field from undisturbed positions to sea lock for better risk awareness and accident prevention.
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
(2023)
Article
Thermodynamics
Constantin Sula, Holger Grosshans, Miltiadis Papalexandris
Summary: This study presents a numerical investigation of n-dodecane flames using Large-Eddy Simulations (LES) and the Flamelet Generated Manifold (FGM) method. A novel approach for coupling the energy equation with the FGM database for spray combustion simulations is proposed, which helps decrease computational cost. The results show differences between two kinetics mechanisms in ignition characteristics, while similar flame structures are observed once the flame is stabilized at the lift-off distance.
FLOW TURBULENCE AND COMBUSTION
(2022)
Article
Oceanography
Ke Chen, Glen Gawarkiewicz, Jiayan Yang
Summary: Observations and high-resolution numerical modeling are used to investigate the dynamical processes related to the initiation of an advective Marine Heatwave in the Middle Atlantic Bight. The results highlight the importance of cyclonic eddies and upwelling-favorable winds in producing large-distance cross-shelf penetration and temperature/salinity anomalies. The presence of smaller scale cyclonic eddies and the intricacy of the interplay between multiple processes are essential in driving significant cross-shelf events.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Review
Meteorology & Atmospheric Sciences
Georgios Deskos, Joseph C. Y. Lee, Caroline Draxl, Michael A. Sprague
Summary: This review article discusses existing wind-wave coupling models and parameterizations for large-eddy simulation of the marine atmospheric boundary layer. The models are categorized into wave-phase-averaged and wave-phase-resolved models, and their implementation, validity, and computational efficiency are discussed. Emphasis is placed on their applicability in offshore wind energy problems, with a review of laboratory-scale and field-measurement databases for model validation provided. Knowledge gaps in modeling and computational challenges ahead are also addressed.
JOURNAL OF THE ATMOSPHERIC SCIENCES
(2021)
Article
Meteorology & Atmospheric Sciences
Coltin Grasmick, Bart Geerts, Xia Chu, Jeffrey R. French, Robert M. Rauber
Summary: Kelvin-Helmholtz (KH) waves are a common source of turbulence in stratiform precipitation systems over mountainous terrain, introducing large eddies and small-scale turbulence into laminar flow. Dynamics associated with KH waves influence microphysical processes in clouds, impacting precipitation growth and fallout. Observations and modeling suggest that KH waves may increase precipitation by enhancing depositional and accretional growth and ice nucleation within mixed-phase clouds.
JOURNAL OF THE ATMOSPHERIC SCIENCES
(2021)