The application of digital image analysis to study the characteristic of bubble size distribution produced by orifice type microbubble generator

2018 ◽  
Author(s):  
Wibawa Endra Juwana ◽  
Arif Widyatama ◽  
Akmal Irfan Majid ◽  
Wiratni ◽  
Indarto ◽  
...  
Keyword(s):  
Image Analysis ◽  
Size Distribution ◽  
Digital Image ◽  
Bubble Size ◽  
Digital Image Analysis ◽  
Bubble Size Distribution

scholarly journals Effect of Different Configurations on Bubble Cutting and Process Intensification in a Micro-Structured Jet Bubble Column Using Digital Image Analysis

Processes ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 2220
Author(s):  
Guanghui Chen ◽  
Zhongcheng Zhang ◽  
Fei Gao ◽  
Jianlong Li ◽  
Jipeng Dong
Keyword(s):  
Mass Transfer ◽  
Image Analysis ◽  
Flow Field ◽  
Digital Image ◽  
Bubble Size ◽  
Digital Image Analysis ◽  
Liquid Velocity ◽  
Bubble Column ◽  
Process Intensification ◽  
Interfacial Area

An experimental study was conducted in this work to investigate the effect of different configurations on bubble cutting and process intensification in a micro-structured jet bubble column (MSJBC). Hydrodynamic parameters, including bubble size, flow field, liquid velocity, gas holdup as well as the interfacial area, were compared and researched for a MSJBC with and without mesh. The bubble dynamics and cutting images were recorded by a non-invasive optical measurement. An advanced particle image velocimetry technique (digital image analysis) was used to investigate the influence of different configurations on the surrounding flow field and liquid velocity. When there was a single mesh and two stages of mesh compared with no mesh, the experimental results showed that the bubble size decreased by 22.7% and 29.7%, the gas holdup increased by 5.7% and 9.7%, and the interfacial area increased by more than 34.8% and 43.5%, respectively. Significant changes in the flow field distribution caused by the intrusive effect of the mesh were observed, resulting in separate liquid circulation patterns near the wire mesh, which could alleviate the liquid back-mixing. The mass transfer experiment results on the chemical absorption of CO2 into NaOH enhanced by a mass transfer process show that the reaction time to equilibrium is greatly reduced in the presence of the mesh in the column.

Fully Automated Islet Cell Counter (ICC) for the Assessment of Islet Mass, Purity, and Size Distribution by Digital Image Analysis

2016 ◽  
Vol 25 (10) ◽  
pp. 1747-1761 ◽  
Author(s):  
Peter Buchwald ◽  
Andres Bernal ◽  
Felipe Echeverri ◽  
Alejandro Tamayo-Garcia ◽  
Elina Linetsky ◽  
...  
Keyword(s):  
Image Analysis ◽  
Size Distribution ◽  
Digital Image ◽  
Islet Cell ◽  
Digital Image Analysis ◽  
Islet Mass ◽  
Cell Counter

scholarly journals The validity of laser diffraction system to reproduce hydrometer results for grain size analysis in geotechnical applications

PLoS ONE ◽  
2021 ◽  
Vol 16 (1) ◽  
pp. e0245452
Author(s):  
Hamzah M. Beakawi Al-Hashemi ◽  
Omar S. Baghabra Al-Amoudi ◽  
Zain H. Yamani ◽  
Yassir M. Mustafa ◽  
Habib-ur-Rehman Ahmed
Keyword(s):  
Electron Microscopy ◽  
Grain Size ◽  
Image Analysis ◽  
Size Distribution ◽  
Digital Image ◽  
Digital Image Analysis ◽  
Laser Diffraction ◽  
Grain Size Analysis ◽  
Size Analysis ◽  
Distribution Method

The grain size analysis plays a significant role in any geotechnical study. The grain size analysis, by means of sieving, is usually used for coarse material of particle size > 75 μm. For the fine material; the sedimentation methods are frequently adopted (e.g., hydrometers). Other methods also exist such as electron microscopy, digital image analysis and laser diffraction. The fine geomaterials commonly undergo agglomeration which makes the recognition of individual grain size using digital image analysis or electron microscopy challenging. To facilitate and enhance the grain-size analysis, this study was conducted using the Laser Diffraction System (LDS). Seven samples with different nature (composition and texture) and sources were analyzed by hydrometer and LDS. For LDS, various factors were studied such as air pressure, sonication, dilution, refractive index, and distribution method (volume or number). The results were compared qualitatively and quantitatively based on soil classification systems, fractal dimensions, and other parameters. Furthermore, this study provided a novel criterion to determine which LDS distribution method (volume or number) is to be used depending on the Liquid Limit. A combined sieve-LDS system is recommended to obtain the entire grain size distribution. It is concluded that the LDS is a viable technique that can replace the time-consuming hydrometer method to assess the grain-size distribution.

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