An improved algorithm of image processing technique for film thickness measurement in a horizontal stratified gas-liquid two-phase flow

2016 ◽  
Author(s):  
Hadiyan Yusuf Kuntoro ◽  
Akhmad Zidni Hudaya ◽  
Okto Dinaryanto ◽  
Akmal Irfan Majid ◽  
Deendarlianto
Keyword(s):  
Image Processing ◽  
Film Thickness ◽  
Two Phase Flow ◽  
Thickness Measurement ◽  
Processing Technique ◽  
Image Processing Technique ◽  
Phase Flow ◽  
Two Phase ◽  
Film Thickness Measurement ◽  
Improved Algorithm

scholarly journals Image-Processing-Based Study of the Interfacial Behavior of the Countercurrent Gas-Liquid Two-Phase Flow in a Hot Leg of a PWR

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Gustavo A. Montoya ◽  
Deendarlianto ◽  
Dirk Lucas ◽  
Thomas Höhne ◽  
Christophe Vallée
Keyword(s):  
Image Processing ◽  
Water Level ◽  
Two Phase Flow ◽  
Fluid Model ◽  
Statistical Treatment ◽  
Mechanistic Modeling ◽  
Image Processing Technique ◽  
Phase Flow ◽  
Interfacial Behavior ◽  
Two Phase

The interfacial behavior during countercurrent two-phase flow of air-water and steam-water in a model of a PWR hot leg was studied quantitatively using digital image processing of a subsequent recorded video images of the experimental series obtained from the TOPFLOW facility,Helmholtz-Zentrum Dresden-Rossendorf e.V.(HZDR), Dresden, Germany. The developed image processing technique provides the transient data of water level inside the hot leg channel up to flooding condition. In this technique, the filters such as median and Gaussian were used to eliminate the drops and the bubbles from the interface and the wall of the test section. A Statistical treatment (average, standard deviation, and probability distribution function (PDF)) of the obtained water level data was carried out also to identify the flow behaviors. The obtained data are characterized by a high resolution in space and time, which makes them suitable for the development and validation of CFD-grade closure models, for example, for two-fluid model. This information is essential also for the development of mechanistic modeling on the relating phenomenon. It was clarified that the local water level at the crest of the hydraulic jump is strongly affected by the liquid properties.

Fuzzy Clustering of Vertical Two Phase Flow Regimes Based on Image Processing Technique

2010 ◽  
Author(s):  
Soheil Ghanbarzadeh ◽  
Pedram Hanafizadeh ◽  
Mohammad Hassan Saidi ◽  
Ramin Bozorgmehry B.
Keyword(s):  
Image Processing ◽  
Two Phase Flow ◽  
Extraction Procedure ◽  
Flow Regimes ◽  
Flow Patterns ◽  
Image Processing Technique ◽  
Test Facility ◽  
Second Phase ◽  
Phase Flow ◽  
Two Phase

In order to safe design and optimize performance of industrial systems which work under two phase flow conditions, it’s often needed to categorize flow into different regimes. In present work the experiments of two phase flow were done in a large scale test facility with length of 6m and 5cm diameter. Four main flow regimes were observed in vertical air-water two phase flows at moderate superficial velocities of gas and water: Bubbly, Slug, Churn and Annular. Some image processing techniques were used to extract information from each picture. This information include number of bubbles or objects, area, perimeter, height and width of objects (second phase). Also a texture feature extraction procedure was applied to images of different regimes. Some features which were adequate for regime identification were extracted such as Contrast, Energy, Entropy and etc. To identify flow regimes a fuzzy interface was introduced using characteristic of second phase in picture. Also an Adaptive Neuro Fuzzy (ANFIS) was used to identify flow patterns using textural features of images. The experimental results show that these methods can accurately identify the flow patterns in a vertical pipe.

MEASUREMENT OF INTERFACIAL AREA TRANSPORT OF GAS-LIQUID TWO-PHASE FLOW IN A MINI PIPE USING IMAGE-PROCESSING

2004 ◽  
Vol 2004.9 (0) ◽  
pp. 73-76
Author(s):  
Norihiro Fukamachi ◽  
Tatsuya Hazuku ◽  
Tomoji Takamasa ◽  
Takashi Hibiki ◽  
Mamoru Ishii
Keyword(s):  
Image Processing ◽  
Two Phase Flow ◽  
Interfacial Area ◽  
Phase Flow ◽  
Two Phase ◽  
Interfacial Area Transport
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