Bubble velocity measurements using binary image processing techniques

Tri Bui-Dinh; Tae-Sun Choi

doi:10.1117/12.411583

28 December 2000 Bubble velocity measurements using binary image processing techniques

Tri Bui-Dinh, Tae-Sun Choi

Proceedings Volume 4115, Applications of Digital Image Processing XXIII; (2000) https://doi.org/10.1117/12.411583
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

Abstract

The bubble rise velocity in air/water two-phase flow in a vertical pipe is studied experimentally by processing consecutive series of digitized video images. The shape of the bubble, as well as its instantaneous velocity is measured by using binary image processing techniques. Digital image processing algorithms have been developed to obtain the coordinates of specified points in image. This coordinate data was used to calculate the instantaneous bubble velocity, which can be expressed as a separation distance between the two consecutive image frames. This method has many advantages it is a non-invasive measurement, and does not require sophisticated laboratory equipment. Images are directly digitized by using CCD digital camera. Image analysis involves purely computer-based computation. Hence reasonably accurate velocity data has been obtained from only one experiment in a small period of time.

Citation Download Citation

Tri Bui-Dinh and Tae-Sun Choi "Bubble velocity measurements using binary image processing techniques", Proc. SPIE 4115, Applications of Digital Image Processing XXIII, (28 December 2000); https://doi.org/10.1117/12.411583

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