Experiments were performed to study the spatio-temporal temperature variation underneath growing bubbles on a thin platinum heating foil in saturated and subcooled nucleate pool boiling of water at atmospheric pressure. The transient wall temperature distributions were recorded with spatial resolutionof 40 m by a high-speed infrared camera at intervals of 1 ms, synchronised with a high-speed video camera to record bubble motion. Examples are presented of the transient distributions of wall temperature, heat flux and heat transfer coefficient underneath bubbles growing with the fast and slow bubble detachment mechanisms in saturated and subcooled pool boiling. Comments are made on the evidence for and against particular mechanisms of heat transfer.
| Language: | English |
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| Keywords: | segrevanje vode, prenos toplote, vrenje, parni mehurčki, gibanje mehurčkov, toplotni tok, nucleate pool boiling, vapor bubbles, bubble motion, heat transfer, heat flux |
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| Work type: | Not categorized (r6) |
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| Tipology: | 1.08 - Published Scientific Conference Contribution |
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| Organization: | FS - Faculty of Mechanical Engineering |
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| Year: | 2009 |
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| Number of pages: | str. 857-866 |
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| Numbering: | Vol. 45, Issue 7 |
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| UDC: | 536.7:66.048 |
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| ISSN on article: | 0947-7411 |
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| COBISS.SI-ID: | 10062363  |
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| Views: | 1223 |
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| Downloads: | 302 |
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