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Journal of Flow Visualization and Image Processing
SJR: 0.161 SNIP: 0.312 CiteScore™: 0.1

ISSN Print: 1065-3090
ISSN Online: 1940-4336

Journal of Flow Visualization and Image Processing

DOI: 10.1615/JFlowVisImageProc.v11.i1.50
15 pages

EFFECTS OF BUBBLE SHAPE ASSUMPTION ON SINGLE BUBBLE GROWTH BEHAVIOR IN NUCLEATE POOL BOILING

Jeongbae Kim
Department of Mechanical Engineering, Two-phase Flow Lab., Pohang University of Science and Technology, San 31, Hyoja Dong, Pohang 790-784, Korea
Han Choon Lee
Department of Mechanical Engineering, Pohang University of Science and Technology San 31, Hyoja Dong, Pohang 790-784, Korea
Byung Do Oh
Department of Mechanical Engineering, Pohang University of Science and Technology San 31, Hyoja Dong, Pohang 790-784, Korea
Moo Hwan Kim
Division of Advanced Nuclear Engineering, POSTECH, Pohang, Gyeongbuk 37673, Republic of Korea; Department of Mechanical Engineering, POSTECH, Pohang, Gyeongbuk 37673, Republic of Korea

ABSTRACT

Analytical research was performed to show the effects of bubble shape assumption on the equivalent bubble radius and heat flow rate behavior during bubble growth, based on experimental results for saturated nucleate pool boiling. The equivalent bubble radius was calculated from bubble images captured during the growth phase using the shape assumption for bubble geometry. The heat flow rate was measured using a microscale heater array and a Wheatstone bridge circuit controller. A theoretical analysis was then performed to illustrate that the form of the bubble shape assumption is very important when analyzing single bubble growth behavior.