Numerical Investigation of Bubble Induced Marangoni Convection: Some Aspects of Bubble Geometry
![Thumbnail](/themes/Mirage2/images/white_rectangle.jpeg)
File Type:
PDFItem Type:
Journal ArticleDate:
2008Access:
openAccessCitation:
O'Shaughnessy, S.M., Robinson, A.J., Numerical Investigation of Bubble Induced Marangoni Convection: Some Aspects of Bubble Geometry, Microgravity Science and Technology, 20, 3-4, 2008, 319 - 325Abstract:
Thermocapillary or Marangoni convection is a surface tension driven flow that occurs when a gas–liquid or vapor–liquid interface is subjected to a temperature gradient. In the past, the contribution to local heat transfer arising from Marangoni convection has been overlooked as insignificant since under earth gravity it is overshadowed by buoyant convection. This study numerically investigates some aspects of bubble size and shape on local wall heat transfer resulting from Marangoni convection about individual bubbles on a heated wall immersed in a liquid silicone oil layer (Pr = 110) of depth 5 mm. It was found that increasing bubble volume causes an increase in the area over which Marangoni convection has affect. Heat transfer therefore increases with bubble size. Over the effective area, the surface averaged hot wall heat transfer is not affected greatly by bubble shape. The surface averaged heat transfer over the effective area on both the hot and cold walls is affected dramatically by bubble size, but the increase is more profound on the cold wall.
Sponsor
Grant Number
Irish Research Council for Science and Engineering Technology (IRCSET)
Author's Homepage:
http://people.tcd.ie/arobinshttp://people.tcd.ie/oshaugse
Description:
PUBLISHED
Author: Robinson, Anthony; O'Shaughnessy, Seamus
Type of material:
Journal ArticleSeries/Report no:
Microgravity Science and Technology20
3-4
Availability:
Full text availableKeywords:
Heat transfer enhancemen, Microgravity, Bubble, Thermocapillary, MarangoniSubject (TCD):
Smart & Sustainable PlanetDOI:
http://dx.doi.org/10.1007/s12217-008-9042-3ISSN:
0938-0108Metadata
Show full item recordLicences: