Results 121 to 130 of about 177,184 (308)

High y⁺ Shear-Stress Turbulence Implementation for High Flux Isotope Reactor Narrow Channel Flows

Fluids
The research objective of this work was to improve the engineering predictions of the turbulence characteristics of flows in curved narrow channels. Such channel flows are commonly encountered in nuclear research and test reactors, with one of them being
Emilian Popov, Nicholas Mecham, Taylor Grubbs   +2 more
doaj   +1 more source

Turbulent separated flow past a backward-facing step: A critical evaluation of two-equation turbulence models [PDF]

The ability of two-equation models to accurately predict separated flows is analyzed from a combined theoretical and computational standpoint. Turbulent flow past a backward facing step is chosen as a test case in an effort to resolve the variety of ...
Speziale, C. G., Thangam, S.
core   +1 more source

Differential rotation and meridional circulation in global models of solar convection

, 2008
In the outer envelope of the Sun and in other stars, differential rotation and meridional circulation are maintained via the redistribution of momentum and energy by convective motions.
Barnes, Brun, Brun, Charbonneau, Choudhuri, Clune, Dikpati, Dikpati, González-Hernández, Haber, Hathaway, Miesch, Miesch, Miesch, Ossendrijver, Pedlosky, Reiners, Rempel, Thompson, Wang   +19 more
core   +1 more source

Methane Pyrolysis Performance in Catalytic Molten Media for Hydrogen Production From the Perspective of Bubble Column Reactor Design and Configuration

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT In the hydrogen production routes from natural gas (methane), methane pyrolysis offers a cleaner option than the established steam methane reforming by producing CO2‐free hydrogen. However, in fixed bed reactors over solid catalysts, this technology experiences rapid catalyst deactivation due to carbon (coke) deposition encapsulating its ...
Muhammad Irfan Fakarudin, Luqmanulhakim Baharudin, Matthew J. Watson, Wan Nor Roslam Wan Isahak   +3 more
wiley   +1 more source

Evaluation of Full Reynolds Stress Turbulence Models in FUN3D for Axisymmetric Jet Flow [PDF]

Two full seven-equation turbulence models have been implemented into the FUN3D code to evaluate their ability to improve the computation of challenging flows encountered in aerospace propulsion, including mixing flows.
Dudek, Julianne C.
core   +1 more source

Experimental methods for wind tunnel studies of seed dispersal by wind

Applications in Plant Sciences, EarlyView.
Abstract The complexity and variability of natural environments make quantitative studies of seed wind dispersal challenging. Wind tunnel experiments offer a controlled alternative to investigate the mechanisms of seed wind dispersal. This review focuses on wind tunnels and the associated technologies used for studying seed wind dispersal, including ...
Liang Tian, Noelle G. Beckman, Lu Zong, Xuanping Qin, Minghu Liu, Zhimin Liu   +5 more
wiley   +1 more source

Radial capacity and hemodynamics evaluation in vitro and implantable feasibility validation in vivo of thinner bioresorbable polymer vascular stents

BMEMat, EarlyView.
A series of in vitro experiments, numerical simulations and in vivo experiments were conducted to jointly evaluate the effects of different thicknesses of bioabsorbable polymer vascular stents on their radial capacity, hemodynamics and in vivo outcomes.
Chong Chen, Tao Li, Zhongyou Li, Jingyuan Zhou, Zhuo Zhang, Yan Xiong, Rifang Luo, Yu Chen, Yunbing Wang, Ping Fu   +9 more
wiley   +1 more source

A k-epsilon modeling of near wall turbulence [PDF]

A k-epsilon model is proposed for turbulent bounded flows. In this model, the turbulent velocity scale and turbulent time scale are used to define the eddy viscosity. The time scale is shown to be bounded from below by the Kolmogorov time scale.
Shih, T. H., Yang, Z.
core   +1 more source

Seals Research at Texas A/M University [PDF]

, 1991
The Turbomachinery Laboratory at Texas A&M has been providing experimental data and computational codes for the design seals for many years. The program began with the development of a Halon based seal test rig.
Morrison, Gerald L.
core   +1 more source

The spread of non‐native species

Biological Reviews, EarlyView.
ABSTRACT The global redistribution of species through human agency is one of the defining ecological signatures of the Anthropocene, with biological invasions reshaping biodiversity patterns, ecosystem processes and services, and species interactions globally.
Phillip J. Haubrock, Ali Serhan Tarkan, Irene Martín‐Forés, Stelios Katsanevakis, Ronaldo Sousa, Ismael Soto, Andy J. Green, Antonín Kouba, Teun Everts, Victoria Dominguez Almela, Nadège Belouard, Cang Hui, Jamie Bojko, Victor Deklerck, Margaux Boeraeve, Franz Essl, J. Robert Britton   +16 more
wiley   +1 more source