Results 1 to 10 of about 1,605,950 (306)

Construction and application of flow pressure drop model of perforated well considering pressure loss of perforation hole [PDF]

open access: yesScientific Reports, 2023
Perforating well is one of the main production wells in reservoir development. Perforating effect directly affects well production, so the optimization of perforating parameters has attracted wide attention.
Hongfeng Jiang   +4 more
doaj   +2 more sources

Prediction of pressure drop in heavy oil water ring based on modified two fluid model [PDF]

open access: yesScientific Reports
Accurate prediction of pressure drop of the heavy oil-water ring flow in pipeline is of great significance for establishing an optimal drag reduction model and ensuring safe production.
Jiqiang Fu   +6 more
doaj   +2 more sources

Performance evaluation of air-source heat pump based on a pressure drop embedded model [PDF]

open access: yesHeliyon
An air-source heat pump simulation model, accounting for evaporator and condenser pressure drop, has been developed. The model is capable of computing the heat pump's coefficient of performance (COP) under different ambient temperatures and relative ...
Tim Koopman, Tingting Zhu, Wilko Rohlfs
doaj   +2 more sources

Effect of Injector Pressure Drop on The ‎Performance of A 1 N Monopropellant ‎Thruster [PDF]

open access: yesفصلنامه علوم و فناوری فضایی, 2022
The effects of injector pressure drop on the performance of a catalytic reactor are studied experimentally. The injectors were simple orifices. Dynamic interactions between the injector and the reactor determine the transient behavior of the system ...
Alireza Rajabi   +6 more
doaj   +1 more source

The submarine fault scarp of the 2011 Tohoku-oki Earthquake in the Japan Trench

open access: yesCommunications Earth & Environment, 2023
Rupture of the plate boundary fault during the 2011 Tohoku-oki earthquake with moment magnitude 9.0 is thought to have propagated to the trench. Surface exposure of the fault has not yet been confirmed because of great depths that are challenging to ...
Hayato Ueda   +3 more
doaj   +1 more source

Pressure Drop Characteristics of Subcooled Water in a Hypervapotron under High and Non-Uniform Heat Fluxes

open access: yesEnergies, 2023
To study the pressure drop characteristics of hypervapotron, which was designed as a water-cooling structure in the divertor dome of the fusion reactor, the pressure drop tests of subcooled water were carried out in a vertically upward hypervapotron.
Ge Zhu   +3 more
doaj   +1 more source

Blood Pressure Drop Rate After Standing Up Is Associated With Frailty and Number of Falls in Geriatric Outpatients

open access: yesJournal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2020
Background The relationship between orthostatic hypotension and clinical outcome in older adults is poorly understood. Blood pressure drop rate (ie, speed of blood pressure drop) may particularly reflect the imposed challenge to the baroreflex and the ...
Arjen Mol   +6 more
doaj   +1 more source

STATIC PRESSURE DROP IN LAYERS OF CASTOR BEAN GRAINS [PDF]

open access: yesEngenharia Agrícola, 2020
Knowledge regarding the static pressure drop in granular layers is of fundamental importance in the development of efficient drying and aeration projects of agricultural products.
André L. D. Goneli   +4 more
doaj   +1 more source

Experiment of complex flow in full size horizontal wells with perforated completion

open access: yesPetroleum Exploration and Development, 2013
A full size perforated casing of 139.7 mm in external diameter was adopted to simulate the horizontal wellbore. The influences of perforation parameters and injection rate on the pressure drop in horizontal wells were investigated by experiments.
Jianguang WEI   +3 more
doaj   +1 more source

Frictional Pressure Drop and Liquid Holdup of Churn Flow in Vertical Pipes with Different Viscosities

open access: yesGeofluids, 2021
Churn flow commonly exists in the pipe of heavy oil, and the characteristics of churn flow should be widely understood. In this paper, we carried out air and viscous oil two-phase flow experiments, and the diameter of the test section is 60 mm.
Zilong Liu   +4 more
doaj   +1 more source

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