Flow Pattern Identification Of Gas-Liquid Flow Through Horizontal Annular Geometries

2010 ◽  
Author(s):  
Reza Ettehadi Osgouei ◽  
Mehmet Evren Ozbayoglu ◽  
Murat Ahmet Ozbayoglu ◽  
Ertan Yuksel
Keyword(s):  
Flow Pattern ◽  
Liquid Flow ◽  
Pattern Identification ◽  
Flow Through ◽  
Gas Liquid Flow ◽  
Flow Pattern Identification

Energy of Intrinsic Mode Function for Gas-Liquid Flow Pattern Identification

2012 ◽  
Vol 19 (4) ◽  
pp. 759-766 ◽  
Author(s):  
Zhiqiang Sun ◽  
Hui Gong
Keyword(s):  
Flow Pattern ◽  
Liquid Flow ◽  
Average Energy ◽  
Flow Patterns ◽  
Pattern Identification ◽  
Intrinsic Mode Function ◽  
Flow Pattern Map ◽  
Mode Function ◽  
Gas Liquid Flow ◽  
Flow Pattern Identification

Abstract Gas-liquid flows abound in a great variety of industrial processes. Correct recognition of the regimes of a gasliquid flow is one of the most formidable challenges in multiphase flow measurement. Here we put forward a novel approach to the classification of gas-liquid flow patterns. In this method a flow-pattern map is constructed based on the average energy of intrinsic mode function and the volumetric void fraction of gas-liquid mixture. The intrinsic mode function is extracted from the pressure fluctuation across a bluff body using the empirical mode decomposition technique. Experiments adopting air and water as the working fluids are conducted in the bubble, plug, slug, and annular flow patterns at ambient temperature and atmospheric pressure. Verification tests indicate that the identification rate of the flow-pattern map developed exceeds 90%. This approach is appropriate for the gas-liquid flow pattern identification in practical applications.

scholarly journals Influence of Hydrodynamic Conditions on the Type and Area of Occurrence of Gas–Liquid Flow Patterns in the Flow through Open–Cell Foams

Materials ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3254
Author(s):  
Roman Dyga ◽  
Małgorzata Płaczek
Keyword(s):  
Flow Pattern ◽  
Liquid Flow ◽  
Flow Patterns ◽  
Metal Foams ◽  
Hydrodynamic Characteristics ◽  
Internal Diameter ◽  
Open Cell ◽  
Flow Through ◽  
Open Cell Foams ◽  
Gas Liquid Flow

This paper reports the results of a study concerned with air−water and air−oil two–phase flow pattern analysis in the channels with open–cell metal foams. The research was conducted in a horizontal channel with an internal diameter of 0.02 m and length of 2.61 m. The analysis applied three foams with pore density equal to 20, 30 and 40 PPI (pore per inch) with porosity, typical for industrial applications, changing in the range of 92%–94%. Plug flow, slug flow, stratified flow and annular flow were observed over the ranges of gas and liquid superficial velocities of 0.031–8.840 m/s and 0.006–0.119 m/s, respectively. Churn flow, which has not yet been observed in the flow through the open–cell foams, was also recorded. The type of flow patterns is primarily affected by the hydrodynamic characteristics of the flow, including fluid properties, but not by the geometric parameters of foams. Flow patterns in the channels packed with metal foams occur in different conditions from the ones recorded for empty channels so gas−liquid flow maps developed for empty channels cannot be used to predict analyzed flows. A new gas−liquid flow pattern map for a channel packed with metal foams with the porosity of 0.92–0.94 was developed. The map is valid for liquids with a density equal to or lower than the density of water and a viscosity several times greater than that of water.

GAS-LIQUID FLOW PATTERN RECOGNITION USING DIMENSIONLESS NUMBERS

2019 ◽  
Author(s):  
Caio Araujo ◽  
Tiago Ferreira Souza ◽  
Maurício Figueiredo ◽  
valdir estevam ◽  
Ana Maria Frattini Fileti
Keyword(s):  
Pattern Recognition ◽  
Flow Pattern ◽  
Liquid Flow ◽  
Dimensionless Numbers ◽  
Gas Liquid Flow

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

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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