Convective heat transfer due to thermal Marangoni flow about two bubbles on a heated wall
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2014Access:
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S.M. O'Shaughnessy, A.J. Robinson, Convective heat transfer due to thermal Marangoni flow about two bubbles on a heated wall, International Journal of Thermal Sciences, 78, 2014, 101 - 110Abstract:
Three dimensional simulations of t
hermal Marangoni convection about two bubbles
situated on a heated wall immersed
in a liquid silicone oil layer
have been performed to gain some insight into the thermal and flow interactions between
them.
The
distance
between the two bubbles
’ centres
was varied between
three and
twenty five
bubble radii
to analyse
the influence of the
inter
-
bubble spacing
on the fl
ow and temperature fields and the impact upon local wall heat transfer.
For zero gravity conditions, it was determined that the local wall heat flux was greatest for the smallest separation of thre
e
bubble radii, but that the increase in heat transfer over
the whole domain was greatest for a s
eparation of ten bubble radii.
When the effects of gravity were included in the model, the behaviour was observed to change between the cases. At
large separations between the bubbles, increasing the gravity level was
found to decrease the local wall heat flux, which
was consistent with two
-
dimensional work. At small separations however, the increase in gravity led to an increase in the
local wall heat flux, which was caused by a buoyancy
-
driven flow formed by the inter
action of secondary vortices
Author's Homepage:
http://people.tcd.ie/arobinshttp://people.tcd.ie/oshaugse
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PUBLISHED
Author: Robinson, Anthony; O'Shaughnessy, Seamus
Type of material:
Journal ArticleSeries/Report no:
International Journal of Thermal Sciences78
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Full text availableKeywords:
Marangoni,, thermocapillary, bubbles, numerical, heat transfer, vortex, enhancementSubject (TCD):
Smart & Sustainable PlanetDOI:
http://dx.doi.org/10.1016/j.ijthermalsci.2013.12.007ISSN:
1290-0729Metadata
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