DEVELOPMENT OF HIGH-SPEED PHOTOGRAPHY AND IMAGE PROCESSING METHOD FOR THE CHARACTERIZATION OF BUBBLES IN A BUBBLE COLUMN

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ASADI HAMID; HORMOZI FARAMARZ

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Journal: Nashrieh Shimi va Mohandesi Shimi Iran Year:2014 | Volume:32 | Issue:4 (70) Page(s): 71-80

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Title

DEVELOPMENT OF HIGH-SPEED PHOTOGRAPHY AND IMAGE PROCESSING METHOD FOR THE CHARACTERIZATION OF BUBBLES IN A BUBBLE COLUMN

Author(s)

ASADI HAMID | HORMOZI FARAMARZ | Issue Writer Certificate

Keywords

BUBBLE COLUMNQ2

BUBBLE CHARACTERISTICSQ2

HIGH SPEED PHOTOGRAPHYQ2

IMAGE PROCESSINGQ1

Abstract

In the present research, a square BUBBLE COLUMN has experimentally been utilized in order to quantify the important hydrodynamic properties of bubbly liquid/gas two phase flows, such as bubble velocity and diameter, flow pattern as well as oscillationfrequency of the gas phase via the high-speed video recorder. Results were then processed using new techniques of IMAGE PROCESSING. The column was fabricated from plexy-glass which was dimensionally 20´5´120cm (cross section´height). Results indicated that gas superficial velocity varied from 0.1 to 0.7 cm/s. Three cameras with different speeds were employed (20, 500 and 600 frames per second) to evaluate the BUBBLE CHARACTERISTICS and MATLAB 7.4 (2007a) was used for image analysis. Oscillation frequency of gas phase was obtained using a new method with accuracy close to 95%. At coalescence condition, Mean Sauter Diameter (MSD) of bubbles was calculated with accuracy of about 99.8%. For the first time, bubble velocity was computed by "minimum distance with upper limit" method in the BUBBLE COLUMN.

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APA: Copy

ASADI, HAMID, & HORMOZI, FARAMARZ. (2014). DEVELOPMENT OF HIGH-SPEED PHOTOGRAPHY AND IMAGE PROCESSING METHOD FOR THE CHARACTERIZATION OF BUBBLES IN A BUBBLE COLUMN. NASHRIEH SHIMI VA MOHANDESI SHIMI IRAN (PERSIAN), 32(4 (70)), 71-80. SID. https://sid.ir/paper/26217/en

Vancouver: Copy

ASADI HAMID, HORMOZI FARAMARZ. DEVELOPMENT OF HIGH-SPEED PHOTOGRAPHY AND IMAGE PROCESSING METHOD FOR THE CHARACTERIZATION OF BUBBLES IN A BUBBLE COLUMN. NASHRIEH SHIMI VA MOHANDESI SHIMI IRAN (PERSIAN)[Internet]. 2014;32(4 (70)):71-80. Available from: https://sid.ir/paper/26217/en

IEEE: Copy

HAMID ASADI, and FARAMARZ HORMOZI, “DEVELOPMENT OF HIGH-SPEED PHOTOGRAPHY AND IMAGE PROCESSING METHOD FOR THE CHARACTERIZATION OF BUBBLES IN A BUBBLE COLUMN,” NASHRIEH SHIMI VA MOHANDESI SHIMI IRAN (PERSIAN), vol. 32, no. 4 (70), pp. 71–80, 2014, [Online]. Available: https://sid.ir/paper/26217/en

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