Optical shadowgraphy analysis of gas bubble equivalent diameters: Factors influencing measurement accuracy in bubble flows

• Autorzy: Luty Przemysław A. , Prończuk Mateusz R. , Bizon Katarzyna D.

Identyfikatory

DOI

10.2478/pjct-2024-0042

• Języki publikacji: EN

Abstrakty

EN

The article explores the impact of various factors on the determination of gas bubble equivalent diameters using optical shadowgraphy. The experimental setup involves a liquid-gas system. The results indicate that the distance between the camera and the bubble rise-up plane has negligible influence on measurement precision as long as the area captured is constant. Increasing the number of analyzed frames significantly reduces uncertainties, while higher image magnification leads to increased uncertainties due to a reduced number of frames and smaller area captured. Image distortion correction minimally affects results and precision. The study concludes that factors such as resolution, frame rate, and elongated flow path captured contribute to more accurate determination of equivalent bubble diameters, essential for the determination of mass and heat transfer coefficients in liquid-gas flows. The results indicate that a sufficiently high number of video frames may be more important than indiscriminately increasing the resolution.

Słowa kluczowe

EN

shadowgraphy; optical imaging; bubbling; bubble diameter; bubble flow; image distortion

• Wydawca: West Pomeranian University of Technology. Publishing House
• Czasopismo: Polish Journal of Chemical Technology
• Rocznik: 2024
• Tom: Vol. 26, nr 4
• Strony: 72--80
• Opis fizyczny: Bibliogr. 25 poz., rys., tab., wz.

Twórcy

autor

Luty Przemysław A.

• Faculty of Chemical Engineering and Technology, Cracow University of Technology, Poland

autor

Prończuk Mateusz R.

• Faculty of Chemical Engineering and Technology, Cracow University of Technology, Poland

autor

Bizon Katarzyna D.

• Faculty of Chemical Engineering and Technology, Cracow University of Technology, Poland

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki (2025).