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Hydrodynamics of partial nucleate boiling by PIV techniqueBašič, Sani Marko ; Škerget, Leopold ; Marn, JureThe presented investigation treats convective effects of ebullition cycle in a partial nucleate boiling regime. During the ebullation cycle the bubble induces considerable flows of liquid phase in ... its vicinity. To quantify these flows the partial nucleate boiling on single nucleation site has been investigated experimentally using PIV technique. After inception the bubble interface passes through five different stages. These stages are: hemispherical expansion, vertical elongation, base shrinking, bubble departure and rising. Liquid phase movement induced by rising bubble is well known as a drift flow phenomenon. Rising bubble convection during the waiting time has been recognized as the most important stage of ebullition cycle for the heat transfer assessment. Unsteady velocity distribution of drift flow in close vicinity of the boiling surface has been analysed using flow field data acquired by PIV. Vertical radial velocity distributions caused by rising bubbles grouped into three different morphological groups are presented graphically along the marked surface parallel to the boiling plate. At the end the governing heat transfer mechanisms in the bubble influence area are treated briefly.Source: International journal of dynamics of fluids [Elektronski vir]. - ISSN 0973-1784 (Vol. 3, no. 1, 2007, str. 11-30)Type of material - article, component partPublish date - 2007Language - englishCOBISS.SI-ID - 11866134
Author
Bašič, Sani Marko |
Škerget, Leopold |
Marn, Jure
Topics
mehanika fluidov |
mehurčasto vrenje |
metoda PIV |
meritve |
eksperimentalne metode |
fluid mechanics |
boiling |
PIV method |
experimental methods |
measurements |
bubbles
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source: International journal of dynamics of fluids [Elektronski vir]. - ISSN 0973-1784 (Vol. 3, no. 1, 2007, str. 11-30)
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Database name | Field | Year |
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Bašič, Sani Marko | 19098 |
Škerget, Leopold | 06428 |
Marn, Jure | 08584 |
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