Volume 19, Issue 12 (December 2019)                   Modares Mechanical Engineering 2019, 19(12): 3039-3049 | Back to browse issues page

‎ 20.1001.1.10275940.1398.19.12.17.3

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Ghannadi M, Saghravani S, Niazmand H. Experimental Analysis of Micro- Nano Bubble Formation inside Venturi Tube with High Speed Photography and Image Processing. Modares Mechanical Engineering 2019; 19 (12) :3039-3049
URL: http://mme.modares.ac.ir/article-15-27736-en.html
Experimental Analysis of Micro- Nano Bubble Formation inside Venturi Tube with High Speed Photography and Image Processing
M. Ghannadi1 , S.F. Saghravani * 2, H. Niazmand3
1- Civil Engineering Department, Shahrood University, Shahrood, Iran
2- Civil Engineering Department, Shahrood University, Shahrood, Iran , saghravani@shahroodut.ac.ir
3- Mechanical Engineering Department, Ferdowsi University, Mashhad, Iran
Abstract:   (5439 Views)

In this research, micro-nano bubbles formation inside the venturi tube has been investigated using image processing technique and high-speed photography. For the purpose, two models of venturi tubes with different dimensions were made of light and transparent plexiglass and then they were tested with various water flow discharges. After the injection of air into the venturi tube, a high-speed camera has been used to capture images of two-phase flows passing through the venturi tube. The captured images were processed by MATLAB software. After investigating the results and obtaining the average diameter of the bubbles, the number of Micro-Nano bubbles and the velocity in the center of venturi tube have been calculated and the related graphs have been analyzed. The results show that reducing bottleneck length and increasing flow discharge inside the venturi tube lead to the formation of smaller bubbles and the number of Micro-Nano bubble increases.


Keywords: Micro-Nano Bubbles, Matlab, Venturi Tube, Image Processing, High Speed Photography
Full-Text [PDF 1732 kb]   (2344 Downloads)    
Article Type: Original Research | Subject: Heat & Mass Transfer
Received: 2018/12/2 | Accepted: 2019/05/26 | Published: 2019/12/21
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