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Submicron thermal imaging of a nucleate boiling process using fluorescence microscopySedmak, Ivan, 1978- ...The submicron characterization of transient heat-transfer processes at solid-liquid interfaces is of great importance in many areas of science and engineering. This paper reports on a technique that ... allows for the transient thermal imaging of the temperature field underneath a growing bubble during nucleate boiling with submicron spatial resolution. The boiling experiments were performed on a temperature-sensitive, erbium-doped, heavy-metal glass, Er:ZBLALiP, used as a robust sensing material for the non-invasive, transient temperature measurements. These measurements were made by analyzing the intensity variations of the fluorescence emission. The thermal imaging of an active nucleation site was performed by utilizing high-resolution, fluorescence microscopy, which enabled a maximum spatial resolution of 370 nm/pixel. The high-speed acquisition above 400 fps ensured sampling of individual bubble-nucleation events. Our transient measurements clearly revealed temperature variations underneath the growing bubble, as well as a measurable bubble-departure frequency under saturated conditions. These encouraging results suggest the need for a systematic use of the corresponding fluorescence technique on enhanced boiling surfaces in order to define the local heat-transfer characteristics and to gain a better understanding of the underlying physical processes.Source: Energy. - ISSN 0360-5442 (Vol. 109, Aug. 2016, str. 436-445)Type of material - article, component partPublish date - 2016Language - englishCOBISS.SI-ID - 14672155
Author
Sedmak, Ivan, 1978- |
Urbančič, Iztok, fizik |
Podlipec, Rok |
Štrancar, Janez |
Mortier, Michel |
Golobič, Iztok
Topics
temperature-dependent fluorescence |
erbium-doped heavy-metal glass |
nucleate boiling |
submicron spatial resolution |
transient thermal imaging |
temperaturno odvisna fluorescenca |
submikronska krajevna ločljivost |
mehurčkasto vrenje
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Sedmak, Ivan, 1978- | 27773 |
Urbančič, Iztok, fizik | 32057 |
Podlipec, Rok | 34747 |
Štrancar, Janez | 18273 |
Mortier, Michel | |
Golobič, Iztok | 05566 |
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