Results 61 to 70 of about 3,418,514 (199)

CFD Analysis of Pressure Losses and Deposition Velocities in Horizontal Annuli

International Journal of Chemical Engineering, 2019
Estimation of pressure losses and deposition velocities is vital in the hydraulic design of annular drill holes in the petroleum industry. The present study investigates the effects of fluid velocity, fluid type, particle size, particle concentration ...
Rasel A. Sultan, Mohammad Azizur Rahman, Sayeed Rushd, Sohrab Zendehboudi, Vassilios C. Kelessidis   +4 more
doaj   +1 more source

Study on Fluid Pressure in Tubing, Dynamic Stress in Reservoir, and Fracture Propagation Morphology During Variable‐Rate Hydraulic Fracturing

Energy Science &Engineering, EarlyView.
Variable‐rate hydraulic fracturing can induce unsteady flow in the tubing, thereby generating fluctuating fluid pressure near the bottom‐hole reservoir. Dynamic stress is generated in the reservoir under the action of fluctuating fluid pressure and propagates as stress waves.
Zhu Ge, Wang Chaojing, Li Weicheng
wiley   +1 more source

Underreamer mechanics [PDF]

, 2009
In the oil and gas industry, an underreamer is a tool used to extend and enlarge the diameter of a previously-drilled bore. The problem proposed to the Study Group is to obtain appropriate mathematical models of underreamer dynamics, in forms that will ...
Coskun, Erhan, Richardson, Giles, Lorenz, Maike, Jones, Marvin, Barton, David, Hall, Cameron, Lacey, Andrew, Maringer, Johannes, Please, Colin   +8 more
core  

Grounding and Operationalising the SYNAPSE Model: Design Principles and Observable Indicators for Human‐Centered, AI‐Augmented Learning

Future in Educational Research, EarlyView.
ABSTRACT This article consolidates and operationalises SYNAPSE, a human‐centered model that structures learning in four interrelated phases—Sensory Input, Network Adaptation, Participation, and Storage & Embodiment—for education in the age of artificial intelligence (AI).
Sarah Chardonnens, Srushti Satoskar
wiley   +1 more source

Western String Chamber Orchestra, April 9, 1997

, 2016
Recorded during a live performance at Dalton Center Recital Hall, Western Michigan University, Kalamazoo, Michigan, April 9, 1997, 8:00 p.m., the 502nd concert of the School of Music's 1996-1997 season.Western String Chamber Orchestra, Bruce J. Uchimura,
Western String Chamber Orchestra
core  

Different gut microbiome dysbioses impact the evolutionary fate of hypervirulent Klebsiella pneumoniae

iMeta, EarlyView.
Transient exposure to ampicillin results in restructuring of microbiota to favor oxygen‐tolerant bacteria, whereas osmotic laxative perturbation preserves Bacteriodota. Ampicillin‐ but not laxative‐exposed environment favors establishment of rmpA phase variants that lost hypermucoviscosity but short‐chain fatty acids present in the laxative‐exposed gut
Carey Lim, Jialing Zheng, Guoxiang Cheam, Melvin Yong, Hanrong Chen, Andrew Ting, Yahua Chen, Qingqing Wang, Niranjan Nagarajan, Yunn‐Hwen Gan   +9 more
wiley   +1 more source

Western String Chamber Orchestra, November 14, 1996

, 2016
Recorded during a live performance at Dalton Center Recital Hall, Western Michigan University, Kalamazoo, Michigan, November 14, 1996, 8:00 p.m., the 137th concert of the School of Music's 1996-1997 season.Western String Chamber Orchestra, Bruce J ...
Western String Chamber Orchestra
core  

Improved stiff string torque and drag prediction using a computationally efficient contact algorithm

Mathematical and Computer Modelling of Dynamical Systems
Due to the intermittent contact with the wellbore, determining torque and drag for deviated wells is difficult. Most models have ignored drill string stiffness and assumed continual contact to simplify derivation.
Sampath Liyanarachchi, Geoff Rideout
doaj   +1 more source

Topographic and Climatic Determinants of Soil Organic Carbon Across Landscapes: A Meta‐Analysis

Land Degradation &Development, EarlyView.
ABSTRACT The soil is the greatest natural store of organic carbon, holding between 1500 to 1550 Pg C of organic carbon at the top 100 cm of the soil globally—roughly twice the carbon pool in the atmosphere. The spatial distribution of this stock is controlled by a complex chain of controls: topographic position regulates the hydrological redistribution,
Vishal Sharma, Syed Hujjat ul Baligah, Tajamul Islam Shah, Shahid Shuja Shafai, Owais Bashir, Syed Sheraz Madhi, S. Naresh Kumar, Ayyandar Arunachalam, Shabir Ahmed Bangroo   +8 more
wiley   +1 more source

Western String Chamber Orchestra, March 24, 1996

, 2016
Recorded during a live performance at Dalton Center Recital Hall, Western Michigan University, Kalamazoo, Michigan, March 24, 1996, 3:00 p.m., the 445th concert of the School of Music's 1995-1996 season.Western String Chamber Orchestra, Bruce J. Uchimura,
Western String Chamber Orchestra
core