Experimental study of low concentration sand transport in wet gas flow regime in horizontal pipes

The TiO2thin films were prepared using Ti(dpm)2(OPri)2and Ti(OPri)4(dpm = 2,2,6,6-tetramethylheptane-3,5-dione,Pri= isopropyl) as the precursors. The volatile compounds Fe[(C2H5)2NCS2]3and [(CH3)C]2S2were used to prepare doped TiO2films. The synthesis was done in vacuum or in the presence of Ar and O2. The pressure in the CVD chamber was varied between1.2×10−4 mbar and 0.1 mbar, with the system working either in the molecular beam or gas flow regime. Physical, chemical, and photocatalytic properties of the (Fe, S)-doped TiO2films were studied. Those TiO2:(Fe, S) films prepared from the Ti(OPri)4precursor show increased photocatalytic activities, very close to those of Degussa P25 powder in UV region.

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Electrode self-cleaning in a barrier ozonizer operating in a turbulent gas flow regime

Technical Physics Letters ◽

10.1134/1.1829337 ◽

2004 ◽

Vol 30 (11) ◽

pp. 902-904

Author(s):

I. M. Kirko ◽

V. A. Kuznetsov

Keyword(s):

Flow Regime ◽

Gas Flow ◽

Self Cleaning ◽

Turbulent Gas Flow ◽

Gas Flow Regime

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An Experimental Study of the Slip Factor in a Wet Gas Centrifugal Compressor With IGV

Volume 1: Compressors, Fans and Pumps; Turbines; Heat Transfer; Combustion, Fuels and Emissions ◽

10.1115/gtindia2017-4634 ◽

2017 ◽

Author(s):

Levi André B. Vigdal ◽

Lars E. Bakken

Keyword(s):

Experimental Study ◽

Gas Flow ◽

Oil And Gas ◽

Guide Vane ◽

Flow Characteristics ◽

Inlet Guide Vane ◽

Liquid Content ◽

Slip Factor ◽

Wet Gas ◽

Inlet Swirl

The introduction of wet gas compression provides the opportunity for future cost-effective production of oil and gas. A wet gas compressor consists of a robust unit able to increase the pressure of untreated natural gas. This permits longer transport of hydrocarbons without topside facilities if installed at the well head. Obvious benefits include prolonging the life of existing wells and the possibility of exploiting smaller hydrocarbon sources otherwise considered non-commercial. Successful development of robust wet gas compressors requires further understanding of the phenomena which occur when liquid is present in the gas stream. Understanding the way the presence of liquid affects the velocity triangle and slip factor is essential for the design of wet gas compressors and for comprehending their response to varying levels of liquid content in the inlet stream. An experimental study has been performed with various levels of liquid fractions and inlet swirl angles. Impeller-exit velocity components and shift in slip factors are presented within the experimental test boundary. A shift in velocity components and slip factor is experienced with increasing liquid content and inlet guide vane (IGV) setting angle. Consequently, existing slip factor correlations not utilizing inlet flow characteristics are not valid for wet gas flow or with impeller inlet swirl.

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Identification of liquid-gas flow regime in a pipeline using gamma-ray absorption technique and computational intelligence methods

Flow Measurement and Instrumentation ◽

10.1016/j.flowmeasinst.2018.02.008 ◽

2018 ◽

Vol 60 ◽

pp. 17-23 ◽

Cited By ~ 24

Author(s):

Robert Hanus ◽

Marcin Zych ◽

Maciej Kusy ◽

Marek Jaszczur ◽

Leszek Petryka

Keyword(s):

Flow Regime ◽

Computational Intelligence ◽

Gas Flow ◽

Gamma Ray ◽

Computational Intelligence Methods ◽

Gas Flow Regime ◽

Absorption Technique

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Gas flow regime changes in a bubble column filled with a fibre suspension

The Canadian Journal of Chemical Engineering ◽

10.1002/cjce.5450780520 ◽

2000 ◽

Vol 78 (5) ◽

pp. 1017-1022 ◽

Cited By ~ 11

Author(s):

Theodore J. Heindel

Keyword(s):

Flow Regime ◽

Gas Flow ◽

Bubble Column ◽

Regime Changes ◽

Fibre Suspension ◽

Gas Flow Regime

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Experimental Study of Low Concentration Sand Transport in Multiphase Air–Water Horizontal Pipelines

Journal of Energy Resources Technology ◽

10.1115/1.4029602 ◽

2015 ◽

Vol 137 (3) ◽

Cited By ~ 15

Author(s):

Kamyar Najmi ◽

Alan L. Hill ◽

Brenton S. McLaury ◽

Siamack A. Shirazi ◽

Selen Cremaschi

Keyword(s):

Experimental Study ◽

Gas Flow ◽

Intermittent Flow ◽

Sand Transport ◽

Physical Parameters ◽

Internal Diameter ◽

Flow Rates ◽

Minimum Flow ◽

Wide Range ◽

Sand Size

The ultimate goal of this work is to determine the minimum flow rates necessary for effective transport of sand in a pipeline carrying multiphase flow. In order to achieve this goal, an experimental study is performed in a horizontal pipeline using water and air as carrier fluids. In this study, successful transport of sand is defined as the minimum flow rates of water and air at which all sand grains continue to move along in the pipe. The obtained data cover a wide range of liquid and gas flow rates including stratified and intermittent flow regimes. The effect of physical parameters such as sand size, sand shape, and sand concentration is experimentally investigated in 0.05 and 0.1 m internal diameter pipes. The comparisons of the obtained data with previous studies show good agreement. It is concluded that the minimum flow rates required to continuously move the sand increases with increasing sand size in the range examined and particle shape does not significantly affect sand transport. Additionally, the data show the minimum required flow rates increase by increasing sand concentration for the low concentrations considered, and this effect should be taken into account in the modeling of multiphase sand transport.

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