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Journal articles on the topic 'Pressure differential meter'

Author: Grafiati

Published: 4 June 2021

Last updated: 14 February 2022

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1

Xie, Shuang Wei, Jing Zhe Gao, Zi Tong Wen, Li De Fang, Xiang Jie Kong, and Fang Dong. "The Optimal Design of the New Tube Inside and Outside Differential Pressure Flow Meter." Applied Mechanics and Materials 541-542 (March 2014): 1283–87. http://dx.doi.org/10.4028/www.scientific.net/amm.541-542.1283.

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Differential pressure flow meter is a kind of very promising flow measuring instrument, the application range is very wide. But aiming at the defects that the mechanical structure of all kinds of existing flow meters is complex, the throttling way disturbs the fluid greatly and the stability of differential pressure signal is insufficient, a kind of new inside and outside tube differential pressure flow meter was designed.

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2

Shin, Kyu-Sik, Sangwoo Song, Kyungil Lee, Daesung Lee, and Jae Pil Jung. "Fabrication of Single Capacitive type Differential pressure sensor for Differential Flow meter." Journal of the Microelectronics and Packaging Society 24, no. 1 (2017): 51–56. http://dx.doi.org/10.6117/kmeps.2017.24.1.051.

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3

高, 晓东. "Hequ Power Plant Coal Mill Differential Pressure Level Meter." Advances in Energy and Power Engineering 05, no. 01 (2017): 7–12. http://dx.doi.org/10.12677/aepe.2017.51002.

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4

Duan, Quan Sheng, and Li Cui Wang. "Research on the Vortex Mass Flow Meter of Dual Bluff Body Based on Differential Pressure Principle." Applied Mechanics and Materials 401-403 (September 2013): 1110–13. http://dx.doi.org/10.4028/www.scientific.net/amm.401-403.1110.

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The lower limit of the existing vortex mass flow meter based on differential pressure is high. So the application of the existing vortex mass flow meter is limited in the measurement for low flow rate. This paper proposes a method using vortex mass flow meter of dual bluff body based on differential pressure principle. The differential pressure signal between the upstream and downstream can be amplified by the vortex overlap caused by the dual bluff body structure. The results of the simulation by Fluent show that this method can reduce the lower limit of measurement, and improve the measureme

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5

Pope, Jesse M., Steven L. Barfuss, Michael C. Johnson, and Zachary B. Sharp. "Effects of Pipe Wall Offsets on Differential Pressure Meter Accuracy." Journal - American Water Works Association 107, no. 6 (2015): E313—E320. http://dx.doi.org/10.5942/jawwa.2015.107.0081.

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6

Steven, Richard. "Horizontally installed cone differential pressure meter wet gas flow performance." Flow Measurement and Instrumentation 20, no. 4-5 (2009): 152–67. http://dx.doi.org/10.1016/j.flowmeasinst.2008.06.002.

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7

Teyssandier, R. G., and Z. D. Husain. "Experimental Investigation of an Orifice Meter Pressure Gradient." Journal of Fluids Engineering 109, no. 2 (1987): 144–48. http://dx.doi.org/10.1115/1.3242634.

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Wall and plate pressure gradients were investigated in a 3.5 in. (89 mm) air flow orifice meter facility for 3 orifice plates covering a pipe Reynolds number range of 21,000 to 160,000. The influence of the orifice plate on the upstream wall pressure gradient extended to 0.62D location. It was also found that the pressure gradient is a weak function of the orifice plate β ratio. The downstream location of the minimum pressure point located at about 3.3 dam heights. The pressure gradient on the face of the orifice plate shows that the deflection calculation based on any differential pressure ta

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8

Adamski, Krzysztof, Bartosz Kawa, and Rafał Walczak. "3D Printed Flowmeter Based on Venturi Effect with Integrated Pressure Sensors." Proceedings 2, no. 13 (2018): 1509. http://dx.doi.org/10.3390/proceedings2131509.

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In this paper we present a 3D printed flow meter based on venturri effect. Dimensions of the microchannels are 800 µm for wider and 400 µm for thinker channel. Application of different type of sensors was investigated: differential, absolute and digital barometer. Results of measurement of differential pressure and calculation of liquid flow are shown. Presented microfluidics device can be also easy adapted for modular systems. Presented flow meter is the first integration of commercial available sensors and 3D printed microfluidics structure in a single chip.

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9

Yadav, Amar Prasad, Fumiyuki Suzuki, Atsushi Nishikata, and Tooru Tsuru. "Investigation of atmospheric corrosion of Zn using ac impedance and differential pressure meter." Electrochimica Acta 49, no. 17-18 (2004): 2725–29. http://dx.doi.org/10.1016/j.electacta.2004.01.033.

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10

Pellegrini, S. P., A. N. Wrasse, M. J. da Silva, R. E. M. Morales, F. C. Trigo, and J. L. Baliño. "Model analysis for differential pressure two-phase flow rate meter in intermittent flow." Flow Measurement and Instrumentation 81 (October 2021): 102017. http://dx.doi.org/10.1016/j.flowmeasinst.2021.102017.

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11

Dugarte Jerez, Nelson, Antonio Alvarez, Edison Dugarte, Negman Alvarado, and Sonu Bhaskar. "Practical Design of Flow Meter for Mechanical Ventilation Equipment." Journal of Computer Science and Technology 21, no. 1 (2021): e5. http://dx.doi.org/10.24215/16666038.21.e5.

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This paper introduces a practical technique for the design of an instrument used in air flow measurement or flowmeter. This instrument is an essential component in the hospital medical ventilation equipment functioning, therefore, the parameters design presented in this article focus on this purpose. However, this instrument can be employed to any measurement scale. The technique is based on indirect flow measurement, using a sensor that converts the flow parameter into a differential pressure measurement. An electronic transducer allows the differential pressure values to be obtained as an el

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12

Drake, Stephen A., John S. Selker, and Chad W. Higgins. "Wind enhances differential air advection in surface snow at sub-meter scales." Cryosphere 11, no. 5 (2017): 2075–87. http://dx.doi.org/10.5194/tc-11-2075-2017.

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Abstract. Atmospheric pressure gradients and pressure fluctuations drive within-snow air movement that enhances gas mobility through interstitial pore space. The magnitude of this enhancement in relation to snow microstructure properties cannot be well predicted with current methods. In a set of field experiments, we injected a dilute mixture of 1 % carbon monoxide (CO) and nitrogen gas (N2) of known volume into the topmost layer of a snowpack and, using a distributed array of thin film sensors, measured plume evolution as a function of wind forcing. We found enhanced dispersion in the streamw

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13

Bardeau, H., and A. Druilhet. "A High Resolution, Hot-Wire Micro-Flow Meter with Various Applications." Journal of Low Frequency Noise, Vibration and Active Control 11, no. 3 (1992): 93–99. http://dx.doi.org/10.1177/026309239201100304.

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We have perfected a very sensitive, high-resolution electronic flow-meter. The module we have been working on has a cut-off frequency of 200 Hz. It works in a range of pressure-difference from 1 to 100 pascals, with a resolution of 0.1 pascal. The device has enabled us to carry out a series of ground measurements tests of the air's dynamic pressure and of the structure ratio of this parameter, as well as differential pressure measurements. Used as a very sensitive variometer, it has permitted measurements in altitude by means of a meteorological plane specially equipped for turbulence measurem

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14

Beck, S. B. M., and J. Mazille. "A study of a pressure differential flow meter that is insensitive to inlet conditions." Flow Measurement and Instrumentation 12, no. 5-6 (2002): 379–84. http://dx.doi.org/10.1016/s0955-5986(01)00034-6.

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15

Shokrollahi, Hassan. "Elastic-Plastic Analysis of Functionally Graded Spherical Pressure Vessels Using Strain Gradient Plasticity." International Journal of Applied Mechanics 09, no. 08 (2017): 1750118. http://dx.doi.org/10.1142/s1758825117501186.

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In this paper, formulation of elastic-plastic analysis of functionally graded (FG) spherical pressure vessels under internal pressure based on strain gradient plasticity is presented. The material properties are assumed to vary in a power law manner in the radial direction. A linear hardening rule for the material behavior in the plastic region is assumed. After deriving the governing differential equations, a closed form solution is obtained. At the first step, the obtained results were validated against other available results in the literature. Then the effects of changing the inner radius

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16

B.V., Balakin, Kuzmenkov D.M., Kutsenko K.V., Maslov Yu.A., Saparbaeva N.A., and Kharitonov V.S. "Computational Study of Two-Phase Flow Morphology in a Nozzle." KnE Engineering 3, no. 3 (2018): 419. http://dx.doi.org/10.18502/keg.v3i3.1642.

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Multiphase flow meters are widely used in nuclear, petroleum and chemical industries. Here the flow rate is defined indirectly by the differential pressure measurement over the device. An additional measurement is required to estimate average density of the phase mixture. This could be done by means of the gamma-ray, electromagnetic or acoustic tomography. The accuracy of the technique is dependent on flow morphology. The present paper reports the results of CFD-modelling of the gas-liquid flow through the vertical flow meter accompanied by a flow conditioner. The model is used to consider the

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17

Abbas, H. A. M. Hasan. "Measurement of a Void Fraction in Bubbly Gas-Water Two Phase Flows Using Differential Pressure Technique." Applied Mechanics and Materials 152-154 (January 2012): 1221–26. http://dx.doi.org/10.4028/www.scientific.net/amm.152-154.1221.

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Multiphase flows, where two or even three fluids flow simultaneously in a pipe are becoming increasingly important in industry. In order to measure the flow rate of gas-water two phase flows accurately, the void fraction (gas volume fraction) in two phase flows must be precisely measured. The differential pressure technique has proven attractive in the measurement of volume fraction. This paper presents the theoretical and experimental study of the void fraction measurement in bubbly gas water two phase flows using differential pressure technique (the flow density meter).

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18

Jin, Zhong Jun, Yan Ping Xiao, and Qian Min Mao. "Design of Air-Tight Property Detector for Gas Meter Based on C8051F350 MCU." Advanced Materials Research 317-319 (August 2011): 1385–89. http://dx.doi.org/10.4028/www.scientific.net/amr.317-319.1385.

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With the natural gas widely used in the modern industry and daily life, gas safety issues become prominent. An air-tight property detector based on the principle of direct pressure with the C8051F350 MCU as the core is designed in this paper. It is controlled by the main and auxiliary systems in the form of hierarchical, and it is more flexible in detecting. The pressure is measured by the high accuracy differential pressure transmitter and the 24-bit A/D converter is used to deal with the small signals. The temperature compensation algorithm is introduced to improve the detection accuracy. As

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19

Hua, Chenquan, and Yanfeng Geng. "Wet gas meter based on the vortex precession frequency and differential pressure combination of swirlmeter." Measurement 45, no. 4 (2012): 763–68. http://dx.doi.org/10.1016/j.measurement.2011.12.013.

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20

Xu, Lijun, Jian Xu, Feng Dong, and Tao Zhang. "On fluctuation of the dynamic differential pressure signal of Venturi meter for wet gas metering." Flow Measurement and Instrumentation 14, no. 4-5 (2003): 211–17. http://dx.doi.org/10.1016/s0955-5986(03)00027-x.

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21

Cao, Yi, Lin Zhang, Yi Wen Liu, and Wei Zhang. "Designing and Realization of Differential Pressure Densimeter for Heavy Medium Coal Preparation Based on MCU." Applied Mechanics and Materials 419 (October 2013): 264–68. http://dx.doi.org/10.4028/www.scientific.net/amm.419.264.

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The density of heavy-medium coal slurry is a very important parameter and guideposts in coal preparation technique. According to heavy-medium coal preparation processing, the paper designs a differential pressure density meter. It introduces the design principle of the densimeter, the primary instrument and the hardware design of the secondary instrument. But else, it gives an experiences temperature compensation formula and calibration method.

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22

Chen, Wei, Datian Cui, Meng Xu, and Rongchao Xu. "A Method and Equipment for Continuously Testing the Permeability Coefficient of Rock and Soil Layers." Advances in Civil Engineering 2020 (December 24, 2020): 1–6. http://dx.doi.org/10.1155/2020/6639892.

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The water pressure test and steady-flow pumping test are still commonly used for measuring the permeability coefficient of rock and soil strata. Limited by the fact that the average value of the permeability coefficient could be obtained only by this testing method, the accuracy of the experimental results of the permeability coefficient for special rock and soil strata is not good. Therefore, a new on-site testing method and equipment for continuously measuring the permeability coefficient of rock and soil strata is studied in this paper. The method is suitable for water pressure testing in b

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23

Oh, Sang-Teak, Young Il Kim, and Kwang-Seop Chung. "A Study of Static Pressure Differential Measurement of Nozzle for Miniaturization of a Air Flow Meter." Korean Journal of Air-Conditioning and Refrigeration Engineering 28, no. 10 (2016): 414–19. http://dx.doi.org/10.6110/kjacr.2016.28.10.414.

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24

Bridgeman, Devon, Francis Tsow, Xiaojun Xian, and Erica Forzani. "A new differential pressure flow meter for measurement of human breath flow: Simulation and experimental investigation." AIChE Journal 62, no. 3 (2016): 956–64. http://dx.doi.org/10.1002/aic.15143.

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25

Kalis, H. U. "Pulsation Control in Pressure Metering Systems." Journal of Low Frequency Noise, Vibration and Active Control 13, no. 1 (1994): 19–29. http://dx.doi.org/10.1177/026309239401300104.

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Reliable pressure measurement in pulsating flow conditions is difficult. When an orifice meter is used, two significant errors can arise: the square root error, which is inherent to orifice plates, and the pressure distortion generated in the sensing lines and DP transmitter. This study is concerned with minimizing pulsation effects in the sensing-recording system. The method used involves predicting the system dynamic characteristic and modifying it so that pulsation excitation frequencies and the resonant frequencies of the system do not coincide. A differential pressure metering system is m

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26

Wang, Li Na, Li Jun Liu, Wan Xun Wang, and Shan Yang Qin. "Development and Application of Metering Instrument for Well-Head Metering in Block 75 of Sulige Gas Field." Advanced Materials Research 706-708 (June 2013): 762–64. http://dx.doi.org/10.4028/www.scientific.net/amr.706-708.762.

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Along with large scale application of cluster wells in Sulige gas field, the common low pressure flow meter can not be used in metering single well production with connecting wells in series. For this reason, we have developed a flow metering instrument of natural gas, which has the features of high static pressure, low differential pressure and high precision. Installed at the high pressure end of gas production wellhead, the instrument can bear 40Mpa static high pressure and has the features such as low pressure loss, broad measuring range, small temperature drift, high precision, long servi

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27

Redeker, K. R., A. J. Baird, and Y. A. Teh. "Quantifying wind and pressure effects on trace gas fluxes across the soil–atmosphere interface." Biogeosciences Discussions 12, no. 6 (2015): 4801–32. http://dx.doi.org/10.5194/bgd-12-4801-2015.

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Abstract. Large uncertainties persist in estimates of soil–atmosphere exchange of important trace gases. One significant source of uncertainty is the combined effect of wind and pressure on these fluxes. Wind and pressure effects are mediated by surface topography: few surfaces are uniform and over scales of tenths of a meter to tens of meters, air pressure and wind speed at the ground surface may be very variable. In this paper we consider how such spatial variability in air pressure and wind speed affects fluxes of trace gases. We used a novel nested wind tunnel design, comprising a toroidia

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28

Qian, Peng Fei, Guo Liang Tao, Jian Feng Chen, and Bo Lu. "Modeling and Simulation of Stick-Slip Motion for Pneumatic Cylinder Based on Meter-In Circuit." Applied Mechanics and Materials 130-134 (October 2011): 775–80. http://dx.doi.org/10.4028/www.scientific.net/amm.130-134.775.

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For the stick-slip phenomenon encountered in the pneumatic cylinder motion in practical application, the stick-slip mechanism was analyzed and an nonlinear mathematical model based on the improved LuGre model of pneumatic cylinder movement was established. The movement of the piston and the pressure of the rodless chamber in the pneumatic cylinder based on meter-in circuit were obtained through solving the differential equations by four-order variable-step Runge-Kutta method. The comparison between simulation and experimental results shows that the established mathematical model can describe t

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29

Ranjan, R. Sri, and T. Karthigesu. "A capillary flow meter for measuring the hydraulic conductivity of clay under low gradients." Canadian Geotechnical Journal 33, no. 3 (1996): 504–9. http://dx.doi.org/10.1139/t96-072.

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The measurement of water flow through clay at low hydraulic gradients (<1) is a very difficult task requiring several months to accomplish in a laboratory. A capillary flow meter, capable of measuring extremely low flow rates through clay samples under low imposed hydraulic gradients, has been designed and tested. Flux as low as 1012 m·s1 was successfully measured using this flow meter. To minimize the contaminatiion effects, perchloroethylene, which has self-cleaning ability, mixed with Sudan IV was used as the bubble liquid in the capillary flow meter. Glass and Teflon® valves were fuse

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30

Zhang, Shuai, Bin Sun, and Er Peng Wang. "Characteristic Variables Extracting of the Gas-Liquid Two-Phase Flow through V-Cone Flowmeter Based on Adaptive Optimal-Kernel Theory." Advanced Materials Research 516-517 (May 2012): 1082–85. http://dx.doi.org/10.4028/www.scientific.net/amr.516-517.1082.

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In order to study the mechanism of gas-liquid two-phase flow, a method of characteristic variables extracting based on Adaptive Optimal-Kernel (AOK) theory was represented in the paper. First, to collect dynamic differential pressure signal of gas-liquid two-phase flow through a horizontal V-cone flow meter, and then the AOK theory was used to analyze the dynamic differential pressure signal. The movement law of two-phase flow was discussed through the time-frequency spectrum. Finally, four characteristic variables were defined by using the time-frequency spectrum and the ridge of AOK. After t

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31

Chen, Yong, Yiyong Huang, Xiaoqian Chen, and Dengpeng Hu. "Effect of Shear on Ultrasonic Flow Measurement Using Nonaxisymmetric Wave Modes." Shock and Vibration 2014 (2014): 1–17. http://dx.doi.org/10.1155/2014/912404.

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Nonaxisymmetric wave propagation in an inviscid fluid with a pipeline shear flow is investigated. Mathematical equation is deduced from the conservations of mass and momentum, leading to a second-order differential equation in terms of the acoustic pressure. Meanwhile a general boundary condition is formulated to cover different types of wall configurations. A semianalytical method based on the Fourier-Bessel theory is provided to transform the differential equation to algebraic equations. Numerical analysis of phase velocity and wave attenuation in water is addressed in the laminar and turbul

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32

Dinardo, Giuseppe, Laura Fabbiano, and Gaetano Vacca. "Analysis and optimization of a cone flowmeter performance by means of a numerical and experimental approach." Journal of Sensors and Sensor Systems 8, no. 2 (2019): 269–83. http://dx.doi.org/10.5194/jsss-8-269-2019.

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Abstract. Differential pressure flowmeters are commonly used in industrial applications where, however, the upstream flow conditions are usually highly disturbed, caused by the presence, in the network pipe, of elbows, valves, etc. To achieve accurate flow measurements, the use of the cone meter is recommended as the flowmeter has the property to normalize the flow both upstream and downstream. In this paper, the authors present a cone flowmeter of new geometry that allows them to obtain better performance with respect to the original one; in particular, it provides a higher discharge coeffici

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33

Ge, Liang, Ze Hu, Ping Chen, Lei Shi, Qing Yang, and Junbi Liao. "Research on Overflow Monitoring Mechanism Based on Downhole Microflow Detection." Mathematical Problems in Engineering 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/676290.

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The flow rate variation of the drilling fluid and micro-overflow loss is difficult to analyze. The purpose to prevent the occurrence of kick, lost circulation, and other complex conditions is not easy to be achieved. Therefore, the microflow-induced annulus multiphase flow rate and annulus pressure field model were studied, and a downhole microflow measurement system has been developed. A differential pressure type flow measurement was used in the system, and real-time downhole information was obtained to achieve deep, narrow windows and other safety-density complex formation security. This pa

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34

Xu, Ying, Chun Ming Fu, Ruo Shun Ma, and Qiang Zhang. "Wet Gas Flow Rates Computation System for Unattended Operational Natural Gas Well Based on ARM." Advanced Materials Research 328-330 (September 2011): 1981–84. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.1981.

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In order to measure the gas and liquid flow rates of the wet gas on line not separation, this paper develops a wet natural gas two-phase computation system, which accompanies with the dual throttling wet gas flow meter as a secondary instrument. This flow computation system is based on ARM9 embedded system with the Linux OS and is powered by a solar power system. A hardware and software platform of a secondary instrument working for the flow rates computation is constructed for unattended operational natural gas wells. The signal acquisitions of the pressure, differential pressure, temperature

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35

Alamu, Mhunir Bayonle. "Gas-Well Liquid Loading Probed With Advanced Instrumentation." SPE Journal 17, no. 01 (2012): 251–70. http://dx.doi.org/10.2118/153724-pa.

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Summary Drop size, liquid holdup, and pressure drop have been measured simultaneously in real time. This experiment was carried out with air/water to establish annular two-phase flow on a 0.019-m-internal-diameter vertical pipe (7-m-long multiphase-flow facility). Drop concentration, distribution, and sizes in the core flow were measured using Spraytec, a light-diffraction-based instrumentation. Liquid holdup was logged with pairs of flush-mounted ring-conductance probes at various positions within the test section. Pressure drop was monitored using a differential-pressure meter mounted betwee

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36

Gürbüz, Riza. "The Mechatronics Design for Measuring Fluid Friction Losses in Pipe Flows." Solid State Phenomena 113 (June 2006): 603–8. http://dx.doi.org/10.4028/www.scientific.net/ssp.113.603.

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The purpose of this article is to design a mechatronics system to measure fluid friction losses in a specially designed fluid friction apparatus. It measured fluid flow rates by using venturi tube and orifice plate, and velocity of fluid is calculated in terms of flow rate and pipe diameter. Friction factor (K factor) of some valves and fittings such as tee, elbow, Y Junction, gate and globe valves and friction losses in pipe was measured in this system. It is one of the best methods to measure losses in pipes and fittings experimentally. It used a computer, data acquisition cards, pressure di

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Oh, Dae-San, and Choong-Hoon Lee. "A comparative study of flow rate characteristics of an averaging Pitot tube type flow meter according to H parameters based on two kinds of differential pressure measured at the flow meter with varying air temperature." Journal of Mechanical Science and Technology 25, no. 8 (2011): 1961–67. http://dx.doi.org/10.1007/s12206-011-0623-5.

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Koshak, William J., Richard J. Solakiewicz, and Harold S. Peterson. "A Return Stroke NOx Production Model." Journal of the Atmospheric Sciences 72, no. 2 (2015): 943–54. http://dx.doi.org/10.1175/jas-d-14-0121.1.

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Abstract A model is introduced for estimating the nitrogen oxides (NOx = NO + NO2) production from a lightning return stroke channel. A realistic modified transmission line model return stroke current is assumed to propagate vertically upward along a stepped leader channel of 0.1-cm radius. With additional assumptions about the initial radial expansion rate of the channel, the full nonlinear differential equation for the return stroke channel radius r(z, t) is solved numerically using Mathematica V9.0.1.0. Channel conductivity and channel air density are adjustable constants, and the model emp

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Jang, SeokHyun, Sukmin Yoon, Si-Yeon Kim, Young-Joo Lee, and No-Suk Park. "A Study on the Evaluation of Flow Distribution Evenness in Parallel-Arrayed Type Low Pressure Membrane Module Piping." Journal of Korean Society of Environmental Engineers 43, no. 5 (2021): 325–34. http://dx.doi.org/10.4491/ksee.2021.43.5.325.

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Objectives : In this study, the degree of uniformity of the flow rate flowing into each module is measured for the external pressure typed low-pressure membrane (microfiltration) filtration process that has been actually applied to water treatment, and computational fluid dynamics (CFD) technique is used to clarify the cause and effect.Methods : Mobile ultrasonic flow meter was used to measure the flow rate flowing from the membrane module pipe to each module, and the CFD technique was used to verify this.Results and Discussion : From the results of the actual measurement using ultrasonic flow

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MITTEMPERGHER, SILVIA, ANNA CERCHIARI, FRANCESCA REMITTI, and ANDREA FESTA. "From soft sediment deformation to fluid assisted faulting in the shallow part of a subduction megathrust analogue: the Sestola Vidiciatico tectonic Unit (Northern Apennines, Italy)." Geological Magazine 155, no. 2 (2017): 438–50. http://dx.doi.org/10.1017/s0016756817000668.

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AbstractThe Sestola Vidiciatico tectonic Unit (SVU) accommodated the early Miocene convergence between the subducting Adriatic plate and the overriding Ligurian prism, and has been interpreted as a field analogue for the shallow portion of subduction megathrusts. The SVU incorporated sediments shortly after their deposition and was active down to burial depth corresponding to temperatures around 150 °C. Here, we describe the internal architecture of the basal thrust fault of the SVU through a multi-scale structural analysis and investigate the evolution of the deformation mechanisms with incre

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Barak, Otto F., Kresimir Caljkusic, Ryan L. Hoiland, et al. "Differential influence of vitamin C on the peripheral and cerebral circulation after diving and exposure to hyperoxia." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 315, no. 4 (2018): R759—R767. http://dx.doi.org/10.1152/ajpregu.00412.2017.

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We examined if the diving-induced vascular changes in the peripheral and cerebral circulation could be prevented by oral antioxidant supplementation. Fourteen divers performed a single scuba dive to eighteen meter sea water for 47 min. Twelve of the divers participated in a follow-up study involving breathing 60% of oxygen at ambient pressure for 47 min. Before both studies, participants ingested vitamin C (2 g/day) or a placebo capsule for 6 days. After a 2-wk washout, the study was repeated with the different condition. Endothelium-dependent vasodilator function of the brachial artery was as

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42

Ganbavale, G., C. Marcolli, U. K. Krieger, A. Zuend, G. Stratmann, and T. Peter. "Experimental determination of the temperature dependence of water activities for a selection of aqueous organic solutions." Atmospheric Chemistry and Physics Discussions 14, no. 9 (2014): 12673–726. http://dx.doi.org/10.5194/acpd-14-12673-2014.

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Abstract. This work presents experimental data of the temperature dependence of water activity in aqueous organic solutions relevant for tropospheric conditions (200–273 K). Water activity (aw) at low temperatures (T) is a crucial parameter for predicting homogeneous ice nucleation. We investigated temperature dependent water activities, ice freezing and melting temperatures of solutions, and vapour pressures of a selection of atmospherically relevant aqueous organic systems. To measure aw over a wide composition range and with a focus on low temperatures, we use various aw measurement techniq

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Ganbavale, G., C. Marcolli, U. K. Krieger, A. Zuend, G. Stratmann, and T. Peter. "Experimental determination of the temperature dependence of water activities for a selection of aqueous organic solutions." Atmospheric Chemistry and Physics 14, no. 18 (2014): 9993–10012. http://dx.doi.org/10.5194/acp-14-9993-2014.

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Abstract. This work presents experimental data of the temperature dependence of water activity in aqueous organic solutions relevant for tropospheric conditions (200–273 K). Water activity (aw) at low temperatures (T) is a crucial parameter for predicting homogeneous ice nucleation. We investigated temperature-dependent water activities, ice freezing and melting temperatures of solutions, and vapour pressures of a selection of atmospherically relevant aqueous organic systems. To measure aw over a wide composition range and with a focus on low temperatures, we use various aw measurement techniq

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Do, Dao Huu, Nguyen Thi Phuong Khue, and Phan Khac Hai. "Physical Model Test for Soft Soil With or Without Prefabricated Vertical Drain with Loading." Civil Engineering Journal 4, no. 8 (2018): 1809. http://dx.doi.org/10.28991/cej-03091116.

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The paper builds a physical model of testing in the laboratory with the parametric tempered glass box 0.5 0.5 1.2 m (length width depth) containing saturated clay to study the settlement and consolidation when loading increased gradually over time. The research covers herein to present the monitoring of settlement and pore water pressure, settlement calculation, numerical simulation using PLAXIS software V8.2 based on the results of soil physical and mechanical tests before and after loading in case of having or not prefabricated vertical drain (PVD). In case of no PVD, the calculation and num

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Pistun, Yevhen, Leonid Lesovoy, Fedir Matiko, and Roman Fedoryshyn. "Computer Aided Design of Differential Pressure Flow Meters." World Journal of Engineering and Technology 02, no. 02 (2014): 82–91. http://dx.doi.org/10.4236/wjet.2014.22009.

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Wang, Y., M. Penning de Vries, P. H. Xie, et al. "Cloud and aerosol classification for 2 1/2 years of MAX-DOAS observations in Wuxi (China) and comparison to independent data sets." Atmospheric Measurement Techniques Discussions 8, no. 5 (2015): 4653–709. http://dx.doi.org/10.5194/amtd-8-4653-2015.

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Abstract. Multi-Axis-Differential Optical Absorption Spectroscopy (MAX-DOAS) observations of trace gases can be strongly influenced by clouds and aerosols. Thus it is important to identify clouds and characterise their properties. In a recent study Wagner et al. (2014) developed a cloud classification scheme based on the MAX-DOAS measurements themselves with which different "sky conditions" (e.g. clear sky, continuous clouds, broken clouds) can be distinguished. Here we apply this scheme to long term MAX-DOAS measurements from 2011 to 2013 in Wuxi, China (31.57° N, 120.31° E). The original alg

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Chegodaev, V. I. "A discrete integrator for differential pressure gauge/flow meters." Measurement Techniques 34, no. 8 (1991): 800–802. http://dx.doi.org/10.1007/bf00981792.

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Paladino, Emilio E., and Clovis R. Maliska. "Computational modeling of bubbly flows in differential pressure flow meters." Flow Measurement and Instrumentation 22, no. 4 (2011): 309–18. http://dx.doi.org/10.1016/j.flowmeasinst.2011.04.002.

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Lide, Fang, Zhang Tao, and Xu Ying. "Venturi Wet Gas Flow Modeling Based on Homogeneous and Separated Flow Theory." Mathematical Problems in Engineering 2008 (2008): 1–25. http://dx.doi.org/10.1155/2008/807287.

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When Venturi meters are used in wet gas, the measured differential pressure is higher than it would be in gas phases flowing alone. This phenomenon is called over-reading. Eight famous over-reading correlations have been studied by many researchers under low- and high-pressure conditions, the conclusion is separated flow model and homogeneous flow model performing well both under high and low pressures. In this study, a new metering method is presented based on homogeneous and separated flow theory; the acceleration pressure drop and the friction pressure drop of Venturi under two-phase flow c

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Xu, Ying, Chao Yuan, Zheng Hai Long, Qiang Zhang, Zhen Lin Li, and Tao Zhang. "Experimental Investigation of the Wet Gas Measurement Based on Triple Differential Pressures Method." Applied Mechanics and Materials 220-223 (November 2012): 781–84. http://dx.doi.org/10.4028/www.scientific.net/amm.220-223.781.

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In order to meter the wet gas without separation online, a novel measurement device composed of a long throat Venturi tube and a V-cone is proposed and a new metering method based on triple differential pressures. In this method, the ratios of the differential pressures are vital parameters used to establish the measurement correlations. The comparison of these correlations is also presented. In laboratory test, the measurement accuracy of the gas and liquid are 2.13% and 6.68% respectively.

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