Abstract
The efficiency of liquid boiling depends on the different bubble parameters, namely the departure frequency, bubble departure diameter, etc. The nucleation and growth of bubbles contribute to the bulk fluid flow during heating. Hence, studying the bubble dynamics is essential in understanding boiling. The current paper experimentally investigates bubble dynamics using visualisation and image analysis. The visualisation is performed on water boiling in a borosilicate glass container at atmospheric pressure. The resulting bubble formation phenomenon is captured using a 30 fps camera at a full resolution of 1280 × 720 pixels. The images were analysed using ImageJ software. The average radius and average velocity of departure of the bubbles at different instances of time are determined. Figure 1 shows that the average radius of the bubbles formed on the heater surface increased as time increases. The effective number of bubbles decreases with time. The bubble radius increases as the temperature of the heat surface increases. The average bubble velocity appears to increase as the bubble separates itself from the surface and reaches a maximum at some point along its path, before decreasing as the bubble approaches the free surface.
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Vaishak, V.S., Soundararajan, R., Sidharth Shivakumar, P., Christopher Jacob, M., Jothi, T.J.S. (2023). Visualisation Studies on Bubbles Formation and Propagation in Pool Boiling. In: Banerjee, J., Shah, R.D., Agarwal, R.K., Mitra, S. (eds) Recent Advances in Fluid Dynamics . Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-19-3379-0_19
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DOI: https://doi.org/10.1007/978-981-19-3379-0_19
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