Results 241 to 250 of about 1,922 (276)

Microwave transmission method for the detection of water holdup in oil-water mixtures based on a Yagi antenna

Insight - Non-Destructive Testing and Condition Monitoring, 2023
In this paper, Yagi antennas are introduced into microwave transmission measuring instruments as the transmit and receive antennas for detecting moisture content in oil-water mixtures. A Yagi antenna is designed, where the simulation results show a peak gain of 9 dBi and the reflection coefficient S11 is lower than ???10 dB in a frequency band of 2.25-
Hongwei Qin, Pei Yang, Ruirong Dang
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Assessment of Water Holdup in a Multilayer Carbonate Reservoir

Journal of Petroleum Technology, 2005
This article, written by Technology Editor Dennis Denney, contains highlights of paper SPE 93480, “An Integrated Approach for Assessment of Water Holdup in a Multilayer Carbonate Reservoir,” by A. Abdelmawla, SPE, C. Dabbouk, D. Urasaki, B. Ateeq, SPE, and A.R.
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Borehole Water Holdup Detection Using Conical Spiral Transmission Line

2020 IEEE USNC-CNC-URSI North American Radio Science Meeting (Joint with AP-S Symposium), 2020
A conical spiral transmission line-based sensor (CSTLS) is introduced to measure the water holdup in oil-water two-phase flows. The theoretical model of the transmission line is given to describe the electromagnetic wave propagation on the CSTLS. Numerical simulations and experimental results show the water holdup of the measured fluid is approximately
Yong Wei, Chaoxian Qi, Jiefu Chen
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Novel Method for Measuring Water Holdup of Oil and Water Mixture in High Temperature

2011
The experimental method of testing the water content of oil-water mixture in high temperature by microwave was proposed in this paper, and the experimental device of indoor microwave test was established. The device can be used under the temperature of 20°C-200°C and the pressure of 0MPa-2.5MPa. This experiment was accomplished under the temperature of
Guozhong Wu, Jiadong Sun, Xianzhi Yang, Dong Li   +3 more
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Measurement of Water Holdup in Oil-Water Two-phase Flows Using Coplanar Waveguide

2019 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS), 2019
This paper presents the research of oil-water two-phase water holdup detection method and sensor design based on finite ground coplanar waveguide (abbreviated CPW). The relationship between the structure parameters and material parameters of CPW sensor and electromagnetic wave propagation characteristics was analyzed by conformal transformation method.
Yong Wei, Houquan Yu, Jiefu Chen
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Water holdup measurement of oil-water two-phase flow based on KPLS regression

2015 Chinese Automation Congress (CAC), 2015
Oil-water two-phase flow frequently exists in laboratorial researches and petroleum industry. Water holdup is significant parameters for oil-water two-phase flow. The kernel partial least squares (KPLS) is an excellent nonlinear regression model. Compared with partial least squares (PLS), KPLS is provided high accuracy prediction for complex system ...
Nana Wang, Chao Tan, Feng Dong
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Apparatus and technique to measure settling velocity and holdup of solids in water slurries

Chemical Engineering Science, 1993
A technique based on conductivity is described which is shown to be capable of accurately determining settling front velocity and solids holdup ...
A. Uribe-Salas, F. Vermet, J.A. Finch
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Time-dependent gas holdup variation in an air–water bubble column

Chemical Engineering Science, 2004
Abstract Time-dependent gas holdup variation in a two-phase bubble column is reported with air and tap water as the working fluids. The results indicate that time-dependent gas holdup is closely related to the water, whose quality is unsteady and changes, not only during the two-phase flow, but also during idle periods.
Chengzhi Tang, Theodore J. Heindel
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A gas holdup model for cocurrent air–water–fiber bubble columns

Chemical Engineering Science, 2006
Abstract A gas holdup model is developed for cocurrent air–water–fiber bubble column flows using the drift–flux model. The model coefficients are estimated using a nonlinear least square method and systematically acquired experimental data. The model correlates gas holdup with superficial gas and liquid velocity, and fiber type and mass fraction. The
Chengzhi Tang, Theodore J. Heindel
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Data fusion for measurement of water holdup in horizontal pipes by conductivity rings

2011 IEEE International Instrumentation and Measurement Technology Conference, 2011
This paper introduces a method of fusing measurement data of a set of conductivity ring sensors to determine the average water holdup of oil-water two-phase flow within a horizontal pipeline. A six-ring conductivity sensor was built with 1kHz sampling rate, which delivers the generalized dimensionless conductivity and predicts the average water holdup ...
Chao Tan, Feng Dong, Yanyan Shi
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