Results 81 to 90 of about 29,107 (264)

Large-Eddy vs. Reynolds-Averaged Navier–Stokes Simulations of Flow and Heat Transfer in a U-Duct with Unsteady Flow Separation

Energies
Large-eddy simulation (LES) and Reynolds-Averaged Navier–Stokes (RANS) equations were used to study incompressible flow and heat transfer in a U-duct with a high-aspect-ratio trapezoidal cross section.
Kenny S. Hu, Tom I-P. Shih
doaj   +1 more source

Numerical simulation of 3D backward facing step flows at various Reynolds numbers

EPJ Web of Conferences, 2015
The work deals with the numerical simulation of 3D turbulent flow over backward facing step in a narrow channel. The mathematical model is based on the RANS equations with an explicit algebraic Reynolds stress model (EARSM).
Louda Petr, Příhoda Jaromír, Kozel Karel   +2 more
doaj   +1 more source

Are Discrepancies in RANS Modeled Reynolds Stresses Random?

, 2016
Part of the content of this article has been incorporated into "Physics informed machine learning approach for reconstructing Reynolds stress modeling discrepancies based on DNS data. Physical Review Fluids.
Xiao, Heng, Wu, Jin-Long, Wang, Jian-xun, Paterson, Eric G.   +3 more
openaire   +2 more sources

Solid particles focusing, orienting, and de‐focusing in planar Poiseuille flow

AIChE Journal, EarlyView.
Abstract Three‐dimensional, time‐dependent lattice‐Boltzmann simulations of neutrally buoyant particles in planar Poiseuille flow have been performed. The particles are spherical or cylindrical (the latter with a length over diameter ratios in the range 1/3 to 2) and have volume fraction ranging from virtually zero (one particle) to 0.15. The channel's
J. J. Derksen
wiley   +1 more source

Gas–liquid mass transfer enhancement in the presence of nanoparticles under slug flow in microreactors

AIChE Journal, EarlyView.
Abstract Nanofluids containing nanoparticles represent a promising solvent or reaction system for gas–liquid operations. Herein, the effect of nanoparticle (Al2O3 and SiO2) addition on gas–liquid slug flow pattern and mass transfer enhancement was investigated during CO2 absorption into water in microreactors.
Jie Zong, Jun Yue
wiley   +1 more source

Accuracy Analysis of the Turbulence Models K–Ω GEKO and RSM Stress-BSL Using the Example of a 2D Hill Flow Problem

Journal of Mechanical Engineering
This paper presents a numerical simulation of a two-dimensional turbulent flow around a hill (2D Hill Flow) corresponding to the ERCOFTAC Case 018 reference case. Two turbulence models were used to calculate the turbulent flow: a modified two-parameter k-
Murodil Madaliev, Aybek Arifjanov, Lukmon Samiev, Zokhidjon Abdulkhaev   +3 more
doaj   +1 more source

Modeling flow and heat transfer in pipes with turbulators for advanced heat exchangers with high and very high (from a million to a billion) Reynolds numbers

Вестник Дагестанского государственного технического университета: Технические науки
Objective. The paper considers the solution of the heat transfer problem for flow turbulators with a semicircular cross-section using multiblock computational technologies based on the solution of Reynolds' equations (closed for the transient regime ...
I. E. Lobanov
doaj   +1 more source

Evolution of Physical Intelligence Across Scales

Advanced Intelligent Discovery, EarlyView.
By following the evolution of physical intelligence across scales, this article shows how intelligence arises from materials, structures, physical interactions, and collectives. It establishes physical intelligence as the evolutionary foundation upon which embodied intelligence is built.
Ke Liu, Tianyun Huang, Aming Li, Pengyu Lv, Tingting Qin, Wenhui Chen, Hui Wei, Huiling Duan   +7 more
wiley   +1 more source

A Multimodal Intelligent System for Human Digital Twin Simulation with Continuous Kinematic Data Tracking, Biometric Prognosis, and Cognitive State Feedback in Industrial Environments

Advanced Intelligent Discovery, EarlyView.
This article implements a unified human digital twin framework that integrates cutting edge actuation, sensing, simulation, and bidirectional feedback capability. The approach includes integrating multimodal sensing, AI, and biomechanical simulation into one compact system.
Tajbeed Ahmed Chowdhury, Sebastian Gratz‐Kelly, Eric Wagner, Paul Motzki, Martina Lehser   +4 more
wiley   +1 more source

Developing Machine Learning Models of Subgrid Turbulent Transport for Quiet-Sun 3D Radiative Hydrodynamic Simulations

The Astrophysical Journal Supplement Series
Numerical modeling of solar plasma dynamics is affected by the resolution of the computational grid. This often requires the estimation of subgrid processes related to the small-scale flow turbulence, as these processes play a critical role in momentum ...
Rimsha Hameed Syeda, Dustin Kempton, Viacheslav Sadykov, Irina Kitiashvili, Rafal Angryk   +4 more
doaj   +1 more source