Flow pattern transition for horizontal air-water flow in capillary tubes. A microgravity “equivalent system” simulation

Abstract The experiment for oil-gas-water flow pattern transition is carried out in a vertical tube 40mm I.D. and 6m long with a wide range of mixture velocity. Applying the concept of Weisman’s flow pattern transition zone to the investigation on oil-gas-water flow regime, every transition is quantified. The flow regime map, which includes transition zone mentioned above, is compatible with a lot of other pattern transitions. Meanwhile, according to this map the divergence of numerous transitions can be explained. So, that provides a reliable for reasonable understanding of the pattern transitions. Consequently, a method for regime recognition has been put forward with using simultaneously optical fiber probes and conductance probes. The availability of the method can be proved by the images of High Speed Motion Analyzer, which is from Kodak Company.

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Oil–Water Flow Pattern Transition Prediction in Horizontal Pipes

Journal of Energy Resources Technology ◽

10.1115/1.4031608 ◽

2015 ◽

Vol 138 (2) ◽

Cited By ~ 17

Author(s):

Carlos F. Torres ◽

Ram S. Mohan ◽

Luis E. Gomez ◽

Ovadia Shoham

Keyword(s):

Flow Pattern ◽

Water Flow ◽

Prediction Models ◽

Mechanistic Models ◽

Horizontal Pipes ◽

Transition Prediction ◽

Physical Mechanisms ◽

Flow Pattern Map ◽

Flow Pattern Transition ◽

Oil Water

Flow pattern transition prediction models are presented for oil–water flow in horizontal pipes. The transition between stratified and nonstratified flow is predicted using Kelvin–Helmholtz (KH) stability analysis for long waves. New, simplified, and more practical physical mechanisms/mechanistic models are proposed for the prediction of the transition boundaries to semidispersed and to fully dispersed flow. The proposed flow pattern classification significantly simplifies the flow pattern map for liquid–liquid flow and agrees well with the experimental data.

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Flow pattern transition for vertical downward two-phase flow in capillary tubes. Inlet mixing effects

International Communications in Heat and Mass Transfer ◽

10.1016/0735-1933(92)90015-a ◽

1992 ◽

Vol 19 (6) ◽

pp. 791-799 ◽

Cited By ~ 20

Author(s):

Luca Galbiati ◽

Pierangelo Andreini

Keyword(s):

Flow Pattern ◽

Two Phase Flow ◽

Phase Flow ◽

Capillary Tubes ◽

Two Phase ◽

Mixing Effects ◽

Flow Pattern Transition

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GAS-LIQUID FLOW-PATTERN TRANSITION IN HORIZONTAL PIPES – ANALYSIS OF REPORTED MODELS

10.26678/abcm.encit2018.cit18-0562 ◽

2018 ◽

Author(s):

André Mendes Quintino ◽

Davi Lotfi Lavor Navarro da Rocha ◽

Oscar Mauricio Hernandez Rodriguez

Keyword(s):

Flow Pattern ◽

Liquid Flow ◽

Horizontal Pipes ◽

Flow Pattern Transition ◽

Gas Liquid Flow

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Flow pattern, void fraction and pressure drop of two-phase air–water flow in a horizontal circular micro-channel

Experimental Thermal and Fluid Science ◽

10.1016/j.expthermflusci.2007.09.005 ◽

2008 ◽

Vol 32 (3) ◽

pp. 748-760 ◽

Cited By ~ 60

Author(s):

Sira Saisorn ◽

Somchai Wongwises

Keyword(s):

Pressure Drop ◽

Flow Pattern ◽

Water Flow ◽

Void Fraction ◽

Micro Channel ◽

Two Phase

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Spool Valve Hydraulic Measurement Flow Pattern Error Based on Variable Discharge Coefficient

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.667.444 ◽

2015 ◽

Vol 667 ◽

pp. 444-448

Author(s):

Zhuo Lin

Keyword(s):

Flow Pattern ◽

Discharge Coefficient ◽

Compensation Method ◽

Measuring Process ◽

Important Method ◽

Flow Pattern Transition ◽

Spool Valves ◽

Spool Valve ◽

Submerged Discharge

Spool valves are the main elements in electro-hydro servo valves. Hydraulic measurement is an important method for spool valve’s null cutting measuring process. Because of the flow pattern transition, the discharge coefficient is a variable. This phenomenon causes errors if we assume the discharge coefficient is a constant as we always do. In this paper, the variable discharge coefficient is considered to the submerged discharge equation, and the flow pattern error is defined. For improving the precision of overlap values measurements, a compensation method of flow pattern error is presented in this paper.

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