Results 51 to 60 of about 250,499 (303)

Computational fluid dynamics study of yield power law drilling fluid flow through smooth-walled fractures

Journal of Petroleum Exploration and Production Technology, 2019
Presence of natural fractures in sub-surface makes an oil well drilling operation very challenging. As one of the major functions of drilling mud is to maintain bottomhole pressure inside a wellbore to avoid any invasion of unwanted high-pressure influx (
Faysal Ahammad, Shahriar Mahmud, Sheikh Zahidul Islam   +2 more
doaj   +1 more source

Design optimization of a coal seam annular air reverse circulation bit

Energy Science & Engineering, 2023
Reverse circulation (RC) drilling technology enables the rapid acquisition of coal seam samples, which is crucial in accurately measuring gas content. In addition, the design of the drill bit plays a key role in RC sampling. In this study, the turbulence
Demin Chen, Baohua Qu, Wei Long, Yanyan Li   +3 more
doaj   +1 more source

Granular circulation in a cylindrical pan: simulations of reversing radial and tangential flows

, 2006
Granular flows due to simultaneous vertical and horizontal excitations of a flat-bottomed cylindrical pan are investigated using event-driven molecular dynamics simulations.
B. D. Lubachevsky, D. Bideau, H. El hor, John J. Drozd, M. D. Shattuck, O. R. Walton, Oleh Baran, Peter H. Poole, Robert J. Martinuzzi   +8 more
core   +1 more source

On the dynamics of radiative zones in rotating stars [PDF]

, 2006
In this lecture I try to explain the basic dynamical processes at work in a radiative zone of a rotating star. In particular, the notion of baroclinicity is thoroughly discussed.
Rieutord, M.
core   +2 more sources

Mitochondria‐associated membranes (MAMs): molecular organization, cellular functions, and their role in health and disease

FEBS Open Bio, EarlyView.
Mitochondria‐associated membranes (MAMs) are contact sites between the endoplasmic reticulum and mitochondria that regulate calcium signaling, lipid metabolism, autophagy, and stress responses. This review outlines their molecular organization, roles in cellular homeostasis, and how dysfunction drives neurodegeneration, metabolic disease, cancer, and ...
Viet Bui, Maryline Santerre, Natalia Shcherbik, Bassel E Sawaya   +3 more
wiley   +1 more source

Numerical study on thermal-hydraulics of external reactor vessel cooling in high-power reactor using MARS-KS1.5 code: CFD-aided estimation of natural circulation flow rate

Nuclear Engineering and Technology, 2022
This paper presents a numerical investigation of two-phase natural circulation flows established when external reactor vessel cooling is applied to a severe accident of the APR1400 reactor for the in-vessel retention of the core melt.
Min Seop Song, Il Woong Park, Eung Soo Kim, Yeon-Gun Lee   +3 more
doaj   +1 more source

Climate dynamics and fluid mechanics: Natural variability and related uncertainties

, 2010
The purpose of this review-and-research paper is twofold: (i) to review the role played in climate dynamics by fluid-dynamical models; and (ii) to contribute to the understanding and reduction of the uncertainties in future climate-change projections. To
Allen, Andronov, Anishchenko, Anishchenko, Anishchenko, Arnold, Arnold, Arnold, Arnold, Arnol’d, Bak, Bak, Berger, Berloff, Bouchet, Caraballo, Cessi, Chang, Chang, Charney, Coayla-Teran, Cong, Cong, Crauel, Da Costa, Denjoy, Dijkstra, Dijkstra, Dijkstra, Duan, Duan, Dubar, Eckmann, Eric Simonnet, Farrel, Feigenbaum, Feliks, Feliks, Ghil, Ghil, Ghil, Ghil, Gill, Grebogi, Guckenheimer, Guckenheimer, Held, Hillerbrand, Jiang, Jiang, Jin, Jin, Jung, Kaijser, Katok, Katsman, Kloeden, Kondrashov, Kravtsov, Kuksin, Kuznetsov, Langa, Li, Lin, Lin, Lin, Lorenz, Madden, Mañé, McWilliams, Meacham, Michael Ghil, Mickaël D. Chekroun, Mitchell, Moron, Nadiga, Neelin, Newhouse, Oseledets, Palis, Palmer, Pedlosky, Pedlosky, Peixoto, Plaut, Poincaré, Pope, Primeau, Robbin, Robert, Robinson, Saunders, Sell, Sheremet, Simonnet, Simonnet, Simonnet, Simonnet, Simonnet, Simonnet, Sinai, Smale, Smale, Speich, Stainforth, Stommel, Sushama, Sverdrup, Trefethen, Tziperman, Tziperman, Williams, Wunsch, Zmarrou   +113 more
core   +1 more source

Characteristics of Two-Dimensional Quantum Turbulence in a Compressible Superfluid [PDF]

, 2012
Under suitable forcing a fluid exhibits turbulence, with characteristics strongly affected by the fluid's confining geometry. Here we study two-dimensional quantum turbulence in a highly oblate Bose-Einstein condensate in an annular trap.
A. S. Bradley, A. N. Kolmogorov, B. P. Anderson, E. C. Samson, E. M. Wright, J. Sommeria, K. J. H. Law, L. P. Pitaevskii, M. J. Davis, M. Lesieur, P. G. Kevrekidis, R. Carretero-González, S. J. Rooney, T. W. Neely   +13 more
core   +2 more sources

Plasma Glial Fibrillary Acidic Protein Correlates With Brain Metal Burden in Wilson's Disease

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Neuroinflammation driven by extracellular copper contributes to neuronal damage in Wilson's disease (WD). This study investigated the relationship between brain metal burden and peripheral neuroinflammation markers in WD. Methods We conducted a cross‐sectional study involving 89 participants, including patients with WD (n = 63 ...
Sung‐Pin Fan, Ya‐Fang Chen, Cheng‐Hsuan Li, Yih‐Chih Kuo, Ni‐Chung Lee, Yin‐Hsiu Chien, Wuh‐Liang Hwu, Tai‐Chung Tseng, Tung‐Hung Su, Chien‐Ting Hsu, Huey‐Ling Chen, Chin‐Hsien Lin, Yen‐Hsuan Ni   +12 more
wiley   +1 more source

Optimization of Meridional Flow Channel Design of Pump Impeller

International Journal of Rotating Machinery, 2004
The meridional flow channel design of a pump impeller affects its performance. However, since so many design parameters exist, a new design method is proposed in which a meridional and blade-to-blade flow channel is designed by the parallel use of the ...
Sunao Miyauchi, Hironori Horiguchi, Jun-ichirou Fukutomi, Akihiro Takahashi   +3 more
doaj   +1 more source