Results 41 to 50 of about 248 (138)

Pebble dynamics and thermal-fluid analysis of high-temperature gas-cooled pebble bed reactors using DEM and CFD simulations

Frontiers in Nuclear Engineering
This study presents a multiphysics computational simulation framework for analyzing pebble dynamics and thermal-fluid behavior in High-Temperature Gas-Cooled Pebble Bed Reactors (HTG-PBR).
Kashminder S. Mehta, Braden Goddard, Zeyun Wu   +2 more
doaj   +1 more source

Desert pavements: A hidden key to Earth surface processes

Earth Surface Processes and Landforms, Volume 50, Issue 15, December 2025.
Desert pavements are a global phenomenon in arid environments, representing one of the most extensive geomorphological and geoecological features on Earth. To a large extent, they determine the interplay of key processes governing current and past landscape dynamics.
Markus Fuchs, Michael Dietze, Alexander Brenning, Daniela Sauer, Kerstin Schepanski, Dirk Wagner   +5 more
wiley   +1 more source

Numerical Analysis of Local Thermal Non‐Equilibrium Experiments Reveals Conceptual Regimes of Grain‐Scale Heat Transport

Water Resources Research, Volume 61, Issue 11, November 2025.
Abstract Modeling heat transport in saturated porous media typically assumes local thermal equilibrium (LTE) conditions, though this assumption lacks justification. Recent work has revealed local thermal non‐equilibrium (LTNE) effects for groundwater flow conditions, which standard one‐dimensional analytical and numerical models fail to capture ...
Haegyeong Lee, Hannah Gebhardt, Philipp Blum, Peter Bayer, Gabriel C. Rau   +4 more
wiley   +1 more source

The Hydroclimate and Environmental Response to Middle Miocene Warming in the Southwestern USA: Stable Isotope Evidence

Paleoceanography and Paleoclimatology, Volume 40, Issue 5, May 2025.
Abstract Predictions for the southwestern US with warming often suggest increased aridity. We investigate the sedimentary record of the Miocene Climate Optimum and Transition (MCO and MCT; ∼17–14 Ma) in northern New Mexico to understand the impact of warmer global temperatures and higher pCO2 on southwestern US hydroclimate. The MCO and MCT comprised a
Siânin Spaur, Daniel J. Koning, Matthew Heizler, Scott Aby, Garrett Williamson, Jeffrey R. Knott, R. Paul Acosta, Jeremy K. C. Rugenstein   +7 more
wiley   +1 more source

Gnireteet

The Canadian Journal of Chemical Engineering, Volume 103, Issue 4, Page 1466-1473, April 2025.
Sketch of Norman Epstein at his 60th anniversary lecture to the Chemical and Biological Engineering department at the University of British Columbia. Abstract Before 2005, the term ‘teetering’ was relegated to the annuls of history as the term ‘fluidization’ was commonly utilized to describe gas–solids contacting processes.
David R. Bruce
wiley   +1 more source

Pebble flow in the HTR-PM reactor core by GPU-DEM simulation: Effect of friction

Nuclear Engineering and Technology
The high-temperature gas-cooled reactor (HTGR) with spherical fuel elements contains complex pebble flow. The flow behavior of pebbles is influenced by various factors, such as pebble density, friction coefficient, wall structure, and discharge port size.
Zuoyi Zhang, Quan Zou, Nan Gui, Bing Xia, Zhiyong Liu, Xingtuan Yang   +5 more
doaj   +1 more source

Southwestern Tian Shan: 2. Timing of Cenozoic Mountain Building, Intra‐Montane Basin Inversion, and Relation to Lithospheric Mantle Indentation

Tectonics, Volume 44, Issue 4, April 2025.
Abstract Cenozoic reactivation of the Paleozoic thick‐skinned fold‐thrust belt of the southwestern Tian Shan has—as the Afghan‐Tajik Basin inversion—been interpreted to be driven by Indian mantle‐lithosphere indentation beneath the Pamir. Herein, we date the reactivation and explore its temporal and spatial variations. Three structural domains emerged.
Florian Trilsch, Sanaa Reuter, Lothar Ratschbacher, Raymond Jonckheere, Birk Härtel, Shadi Jafari Ansari, Christoph Glotzbach, Konstanze Stübner, Bastian Wauschkuhn, Mustafo Gadoev   +9 more
wiley   +1 more source

Research on Influence of Different Simulation Methods of Bypass Flow in Thermal Hydraulic Analysis on Temperature Distribution in HTR-10

Science and Technology of Nuclear Installations, 2020
In pebble-bed high temperature gas-cooled reactor, gaps widely exist between graphite blocks and carbon bricks in the reactor core vessel. The bypass helium flowing through the gaps affects the flow distribution of the core and weakens the effective ...
Shiyan Sun, Youjie Zhang, Yanhua Zheng
doaj   +1 more source

Burnup analysis for HTR-10 reactor core loaded with uranium and thorium oxide

Nuclear Engineering and Technology, 2020
We used MCNP6 computer code to model HTR-10 core reactor. We used two types of fuel; UO2 and (Th+Pu)O2 mixture. We determined the critical height at which the reactor approached criticality in both two cases.
Mohamed A. Alzamly, Moustafa Aziz, Alya A. Badawi, Hanaa Abou Gabal, Abdel Rraouf A. Gadallah   +4 more
doaj   +1 more source

Modulation of Deformation by Magmatic Tempo, Coast Mountains Batholith, British Columbia, Canada

Tectonics, Volume 43, Issue 11, November 2024.
Abstract The tectonomagmatic evolution of the southern Coast Mountains batholith, British Columbia reveals the relation of magmatic tempo, deformation, and relative plate motions which inform models for growth of continental crust and convergent plate dynamics.
Margaret E. Rusmore, Glenn J. Woodsworth, M. Robinson Cecil, Harold H. Stowell, Elizabeth Bollen, George E. Gehrels, Marty Grove, Pinkie Young   +7 more
wiley   +1 more source