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Visual Measurement Technique for Analysis of Nucleate Flow Boiling (NISTIR 5519)



Mark A. Kedzierski, J. M. Crowder, A. M. Jacobi, L. Zhang


This report records a visual measurement technique for analyzing bubbles formed by nucleate flow boiling. The purpose of measuring these bubbles is to expand understanding the boiling process. By studying the behavior of these vapor bubbles, a better understanding of the physics controlling boiling heat transfer will be gained. The boiling of refrigerants is simultaneously filmed with a high speed 16 mm camera while heat transfer measurements are taken. These tests are performed over a range of heat fluxes and flow velocities to study the effect of these conditions on the bubble dynamics. Analysis of the 16 mm films evolved from a manual to a computer-assisted system, and finally to a digital image analysis system. The following is an overview of the filming apparatus and the bubble measurement schemes.
NIST Interagency/Internal Report (NISTIR) - 5519
Report Number


bubbles, boiling, visualization technique, digital image analysis, alternative refrigerants


Kedzierski, M. , Crowder, J. , Jacobi, A. and Zhang, L. (1994), Visual Measurement Technique for Analysis of Nucleate Flow Boiling (NISTIR 5519), NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD, [online], (Accessed April 24, 2024)
Created October 1, 1994, Updated November 10, 2018