Results 21 to 30 of about 305,370 (309)

Machine learning-augmented turbulence modeling for RANS simulations of massively separated flows

open access: yes, 2021
We combine data assimilation and machine learning to correct the RANS Spalart-Allmaras turbulence model. The final neural-network contribution is a Boussinesq-correction, rather than a turbulent eddy-viscosity adjustment.
P. S. Volpiani   +7 more
semanticscholar   +1 more source

Towards an enhanced protection of attached boundary layers in hybrid RANS/LES methods

open access: yesJournal of Computational Physics, 2020
A robust strategy for the RANS shielding of attached boundary layers in a hybrid RANS/LES context is presented, addressing two major issues. Firstly, the attached boundary layers must be detected to ensure their RANS treatment, but the original shielding
S. Deck, N. Renard
semanticscholar   +1 more source

LES over RANS in building simulation for outdoor and indoor applications: A foregone conclusion?

open access: yesBuilding Simulation, 2018
Large Eddy Simulation (LES) undeniably has the potential to provide more accurate and more reliable results than simulations based on the Reynolds-averaged Navier-Stokes (RANS) approach.
B. Blocken
semanticscholar   +1 more source

Prospects for the use of herbal medicine for liver diseases

open access: yesМедицинский совет, 2014
Liver disease today is the number one digestive disease. According to WHO, there are more than 2 billion people with liver disease in the world, while in the CIS countries the registered number of people suffering from liver disease varies from 500 ...
A. N. Kazyulin, V. A. Shestakov
doaj   +1 more source

Influence of thermal effects to pollutant dispersion in idealized street canyon: numerical study

open access: yesВестник КазНУ. Серия математика, механика, информатика, 2022
In this work, we numerically investigate the process of atmospheric air pollution at various values of the road temperature in idealized urban canyons. To solve this problem, the Reynolds-averaged Navier-Stokes equations (RANS) were used.
A. Issakhov, T. Yang, Perizat Omarova
doaj   +1 more source

CFD simulations of wind flow and mean surface pressure for buildings with balconies: Comparison of RANS and LES

open access: yes, 2020
Facade geometrical details can substantially influence the near-facade airflow patterns and pressures. This is especially the case for building balconies as their presence can lead to multiple separation and recirculation areas near the facades and hence
Xing Zheng, H. Montazeri, B. Blocken
semanticscholar   +1 more source

Completion of a new accelerator-driven compact neutron source prototype RANS-II for on-site use

open access: yes, 2021
RIKEN accelerator driven compact neutron source II (RANS-II), a neutron source that is designed to serve as a prototype of a next-generation downsized accelerator-based compact system, has been constructed and has successfully generated neutrons.
Tomohiro Kobayashi   +4 more
semanticscholar   +1 more source

RANS Simulation of Local Strong Sandstorms Induced by a Cold Pool with Vorticity

open access: yesAtmosphere, 2020
Local strong sandstorms (LSSs) in northwestern China often occur suddenly in tens of minutes during the late afternoon and by dusk. Observations and theoretical studies have shown the trigger role of cold-air pools over desert areas for the occurrence of
Yuanping He   +7 more
doaj   +1 more source

Application of Computational Fluid Dynamics Method for Cross-flow Turbine in Pico Scale

open access: yesJEMMME (Journal of Energy, Mechanical, Material, and Manufacturing Engineering), 2021
Crisis electricity was a crucial issue in the rural area. Crossflow turbine (CFT) in pico in pico scale is the best option for electricity provider for rural areas.
Imam Syofi'i   +3 more
doaj   +1 more source

Ran at a glance [PDF]

open access: yesJournal of Cell Science, 2006
Ran is an abundant Ras-like GTPase that was initially characterized for its role in modulating the nucleo-cytoplasmic transport of macromolecules across the nuclear envelope (NE). However, it is also critical for other cellular processes, including mitotic spindle assembly and post-mitotic ...
openaire   +2 more sources

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