Results 61 to 70 of about 8,820,269 (182)

Assessment of Turbulence Models in a Hypersonic Cold-Wall Turbulent Boundary Layer

Fluids, 2019
In this study, the ability of standard one- or two-equation turbulence models to predict mean and turbulence profiles, the Reynolds stress, and the turbulent heat flux in hypersonic cold-wall boundary-layer applications is investigated.
Junji Huang, Jorge-Valentino Bretzke, Lian Duan   +2 more
doaj   +1 more source

Forced Draught Impact on Externally Venting Flames: An Experimental and Numerical Investigation

Fire and Materials, EarlyView.
ABSTRACT Wind can significantly influence fire development and spread in urban and forest environments causing fatal consequences for the public, the first responders, and the environment. Wind‐driven fires can have a significant impact on structural fires as wind can increase the fire's intensity, development, and flame spread.
Anoop Subramania Warrier, Jan Smolka, Kamila Kempna, Meet Panchal, Tony Graham, Eleni Asimakopoulou   +5 more
wiley   +1 more source

On the Turbulent Prandtl Number in Homogeneous Stably Stratified Turbulence

, 2010
In this paper, we derive a general relationship for the turbulent Prandtl number Prt for homogeneous stably stratified turbulence from the turbulent kinetic energy and scalar variance equations.
Stretch, Derek D., Venayagamoorthy, Subhas K.   +1 more
core   +1 more source

Cio-cio-san no Yūutsu: memoirs of magnetogenesis and Turbulent Dynamo Theory [PDF]

, 2013
The origins of cosmic magnetic fields are not as yet well understood. In this dissertation we investigate, via direct numerical simulation, the temporal evolution and behaviour of magnetic fields that are generated from absolute zero initial conditions ...
Adams, Patrick
core   +1 more source

Effect of turbulent Prandtl number in the convective turbulent heat transfer modelling

Al-Qadisiyah Journal for Engineering Science, 2014
The aim of this work is to investigate the capability of the numerical predications for both dynamic and thermal fields in a turbulent flow by using eddy-viscosity turbulence model.
Ahmed Abed Al-Kadhem Majhool
doaj  

Extension of the turbulent heat flux modelling in OpenFOAM for improved simulation of liquid metal flows

EPJ Nuclear Sciences & Technologies
Turbulent heat transfer is a fundamentally complex physical process that has challenged turbulence modellers for many years. A full differential second-moment closure model provides a solid foundation for the derivation of the simpler Algebraic Heat Flux
Mistry Hemish, Herb Joachim, Papukchiev Angel   +2 more
doaj   +1 more source

Scale dependence of the marine atmospheric boundary‐layer response to ocean surface‐temperature variability in the EUREC4$$ {\mathrm{EUREC}}^4 $$A region

Quarterly Journal of the Royal Meteorological Society, EarlyView.
With a minimal physics model and a high‐resolution fully 3D simulation, we demonstrate that the marine atmospheric boundary layer (MABL) response to sea‐surface temperature (SST) variability displays a dependence on the horizontal scales of motion.
Alessandro Storer, Matteo Borgnino, Claudia Pasquero, Agostino Niyonkuru Meroni   +3 more
wiley   +1 more source

Numerical Simulation of Turbulent Channel Flow at Low Prandtl Number [PDF]

, 2016
Liquid metals are primary coolants in Generation IV nuclear reactors. For low Prandtl\ud fluids, such as liquid metals, classical Reynolds analogy of using turbulent Prandtl number\ud close to unity doesnt predict heat transfer characteristics ...
K, Vasudeva Rao
core  

Theoretical Assessment of the Sodium Pool Fire's Burning Rate in an Open Environment

Safety Science and Technology, EarlyView.
An evaporation‐based model is developed for sodium pool fires. Experiments demonstrate that the burning rate increases with pool diameter and approaches a quasi‐saturated limit (∼0.013 kg m−2 s−1) governed by oxidation product conversion. ABSTRACT The burning rate of sodium pool fires is a critical parameter for assessing fire development and ...
Gao Han, Li Jinmei, Li Qiang, Zhu Wanlin, Qi Jialin   +4 more
wiley   +1 more source

Influence of Thermal Boundary Conditions on Heat Transfer in Turbulent Annular Pipes

Proceedings in Applied Mathematics and Mechanics, Volume 26, Issue 4, December 2026.
ABSTRACT Turbulent concentric annular pipe flow with heat transfer is investigated using the stochastic one‐dimensional turbulence (ODT) model. In the present study, annular pipe flow is investigated at fixed bulk Reynolds number ReDh=17700$\mathit {Re}_{D_{\rm h}}=17\,700$ and Prandtl number Pr=0.71$\mathit {Pr}=0.71$ using two different thermal ...
Pei‐Yun Tsai, Heiko Schmidt, Marten Klein   +2 more
wiley   +1 more source