Results 21 to 30 of about 1,613,587 (302)

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

A Novel Temperature vs Pessure drop Grid Diagram for Energy Saving in Heat Exchanger Network Retrofit

open access: yesChemical Engineering Transactions, 2022
Pressure drop in the heat exchanger is a key issue that should be considered in the HEN retrofit, as increasing the pressure of fluid can cost a substantial amount of energy. To accurately estimate the cost-related trade-off factors, the relative cost of
Bohong Wang   +3 more
doaj   +1 more source

Total Site Heat Integration Considering Pressure Drops

open access: yesEnergies, 2015
Pressure drop is an important consideration in Total Site Heat Integration (TSHI). This is due to the typically large distances between the different plants and the flow across plant elevations and equipment, including heat exchangers.
Kew Hong Chew   +4 more
doaj   +1 more source

Pressure drop – flow characteristic investigations of ATF filter in automatic transmissions (AT) of cars [PDF]

open access: yesBiuletyn Wojskowej Akademii Technicznej, 2014
[b]Abstract[/b]. Potentials effects of pressure drop-flow characteristics of ATF filter on the hydraulic pumps are discussed. Draft device to investigations pressure drop-flow characteristics of ATF filter used in automatic transmissions constructed ...
Tadeusz Dziubak, Paweł Szczepaniak
doaj   +1 more source

Acute Spinal Cord Injury: Correlations and Causal Relations Between Intraspinal Pressure, Spinal Cord Perfusion Pressure, Lactate-to-Pyruvate Ratio, and Limb Power. [PDF]

open access: yes, 2021
BACKGROUND/OBJECTIVE: We have recently developed monitoring from the injury site in patients with acute, severe traumatic spinal cord injuries to facilitate their management in the intensive care unit.
Hogg, FRA   +4 more
core   +1 more source

Pressure drop rate threshold setting of block valves in hydrogen-blended natural gas pipelines

open access: yesYou-qi chuyun, 2021
The mixing of hydrogen will increase the leakage and explosion risk of natural gas pipelines. However, the pressure drop rate threshold of existing block valve in natural gas pipeline cannot meet the safety requirements of hydrogen-blended natural gas ...
Zhaoxue CUI   +5 more
doaj   +1 more source

A Method for Determination of Pressure Drop in Caged-Ball and Caged-Disc Prosthetic Cardiac Valves

open access: yesJournal of King Saud University: Engineering Sciences, 1989
This paper describes a simple theoretical and experimental method to determine the pressure drop across mitral caged-ball and caged-disc prosthetic heart valves under steady state flow conditions.
Yosr A.M. Haggag
doaj   +1 more source

Pressure drop characteristics of reverse circulation pneumatic cuttings removal during coal seam drilling

open access: yesScience Progress, 2020
To solve the problems that the borehole depth is shallow and the drilling efficiency is low during the gas drainage drilling in soft coal seam with current cuttings removal method, a new technology of reverse circulation pneumatic cuttings removal is ...
Xiaoming Han, Songnan Song, Jialiang Li
doaj   +1 more source

Observation and modeling of the suction pump effect during rapid dilatant slip [PDF]

open access: yes, 2003
The temporary pressure drop observed during post-peak dilatant slip in axi-symmetric testing of a porous aeolian sandstone is modeled using a simple function of opening caused by sliding along the fault surface.
Barton   +20 more
core   +1 more source

Study on pressure drop prediction of BWR fuel assembly using CFD analysis

open access: yesNihon Kikai Gakkai ronbunshu, 2017
This paper presents the pressure drop prediction of BWR fuel assembly without experiment. To evaluate the core performance, pressure drop of fuel assembly is one of the key design parameters. The shape of fuel assembly is complicated and the spacer has a
Kojiro TADA, Shinichi MOROOKA
doaj   +1 more source

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