Results 41 to 50 of about 1,909,180 (166)

Investigation on Flowback Behavior of Imbibition Fracturing Fluid in Gas–Shale Multiscale Pore Structure

Energies, 2022
To investigate the influence of flowback time and flowback difference on flowback behavior of shale fracturing fluid, we carried out the permeability test experiment of Longmaxi Formation shale under different flowback pressure gradients and analyzed the
Jiajia Bai, Guoqing Wang, Qingjie Zhu, Lei Tao, Wenyang Shi   +4 more
doaj   +1 more source

Research on the ejection performance of an ejector with low pressure and back pressure

Scientific Reports
This study investigates the influence of back pressure on the mass ejection coefficient (u) of low-pressure methane-air ejectors through a combined approach of one-dimensional mathematical modeling and computational fluid dynamics (CFD) simulations.
Cong Chen, Haijing Liu, Pengfei Duan
doaj   +1 more source

Drugs or dissection? Unraveling a diagnostic puzzle in the ED: A case report on Tizanidine-Nifedipine interaction

Toxicology Reports
Lower back pain is among the top ten reasons patients visit the emergency department (ED). Tizanidine, a centrally acting alpha-2 adrenergic receptor agonist, is commonly prescribed for managing spasticity in patients with cerebral or spinal injuries. It
Muhammad Abd Ur Rehman, Maaz Uddin Mohammed, Muhammad Abdul Mannan, Waleed Salem   +3 more
doaj   +1 more source

Simulations of a Liquid Hydrogen Inducer at Low-Flow Off-Design Flow Conditions [PDF]

, 2005
The ability to accurately model details of inlet back flow for inducers operating a t low-flow, off-design conditions is evaluated. A sub-scale version of a three-bladed liquid hydrogen inducer tested in water with detailed velocity and pressure ...
Ahuja, V., Hosangadi, A., Ungewitter, R. J.   +2 more
core   +1 more source

Squeezing out the last 1 nanometer of water: A detailed nanomechanical study [PDF]

, 2014
In this study, we present a detailed analysis of the squeeze-out dynamics of nanoconfined water confined between two hydrophilic surfaces measured by small-amplitude dynamic atomic force microscopy (AFM).
Chapman, R A, Healy, S, Kata, S G, Robertson, A, Somani, B K   +4 more
core   +1 more source

An aerospike nozzle ejector in MED-TVC systems for performance improvement and operating condition extension

Results in Engineering
Aerospike nozzles, characterized by its distinct structure diverging from the conventional bell nozzle, are commonly employed in aerospace propulsion systems. This structural configuration confers performance advantages under specific operating condition.
Changchao Liu, Mingrui Zhang, Qingyang Han, Wenxu Sun, Haoyuan Xue, Lei Jia   +5 more
doaj   +1 more source

Modified bare-back micro-retrograde tibial arterial access to facilitate peripheral endovascular therapy

Journal of Vascular Surgery Cases and Innovative Techniques, 2023
Patients with critical limb threatening ischemia often present with complex segmental peripheral arterial chronic total occlusions, which might not be amenable to traditional antegrade revascularization techniques.
Faiz Gani, MBBS, Momodou L. Jammeh, MD, Mohamed A. Zayed, MD, PhD, MBA, FACS, DFSVS   +2 more
doaj   +1 more source

Experimental comparison on the smoke movement in horizontal and downhill tunnel fires under subcritical ventilation

Case Studies in Thermal Engineering
In longitudinally ventilated tunnel fires, subcritical ventilation is widely used in the early stage of accidents to maintain smoke stratification. Due to the stack effect, the smoke movement in inclined tunnels is different from that in horizontal ...
Haibin Wei, Yongming Wang, Zhiquan Zeng, Hongrui Shao, Ping Li, Tengfei Wu, Tao Du   +6 more
doaj   +1 more source

Maximum allowable pressure during heavy slurry displacement

Journal of Petroleum Exploration and Production Technology, 2020
Heavy slurry pumping is facing enormous problems concerning pressure generation and casing limitations. Pumping high-density cement throughout narrow column, throttled at their extremity by the float equipment will generate more pressure, and could push ...
Abdeslem Leksir
doaj   +1 more source

Quantification of the Effect of Train Type on Concrete Sleeper Ballast Pressure Using a Support Condition Back-Calculator

Frontiers in Built Environment, 2020
Monitoring ballast support condition and improving current sub-structure and ballast maintenance strategies is critical to ensuring safe and efficient railroad operations.
Camila Pereira Silva, Marcus S. Dersch, J. Riley Edwards   +2 more
doaj   +1 more source