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Numerical investigation of two-phase aqueous foam flow for heat exchanger applications

Gabrielaitiene, Irina LU ; Sundén, Bengt LU and Gylys, J. (2008) CHT-08 ICHMT symposium on Advances in Computational Heat Transfer In Proceedings of CHT-08 ICHMT International Symposium on Advances in Computational Heat Transfer p.337-352
Abstract
This work details investigation of two-phase aqueous foam flow, which is applicable for developing energy-efficient heat exchangers. In such heat exchangers, heat transfer rates are enhanced due to the structure and properties of aqueous foam, namely gas bubbles separated by a thin liquid film. Aqueous foam is noted to have an especially large inter-phase contact surface and reduced surface tension when compared to pure liquids. However, the foam flow in a channel provided with a heated surface (representing a typical heat exchanger element) invokes rearrangement and collision of foam bubbles. This in turn induces changes in local foam velocity, redistribution of volumetric void fraction and temperature. To study this phenomenon, the... (More)
This work details investigation of two-phase aqueous foam flow, which is applicable for developing energy-efficient heat exchangers. In such heat exchangers, heat transfer rates are enhanced due to the structure and properties of aqueous foam, namely gas bubbles separated by a thin liquid film. Aqueous foam is noted to have an especially large inter-phase contact surface and reduced surface tension when compared to pure liquids. However, the foam flow in a channel provided with a heated surface (representing a typical heat exchanger element) invokes rearrangement and collision of foam bubbles. This in turn induces changes in local foam velocity, redistribution of volumetric void fraction and temperature. To study this phenomenon, the finite volume method was applied, which was implemented in FLUENT software (version 6.2). The computation domain consists of a rectangular channel with heat pipe located in a middle of a channel. The influence of different velocities and values of volumetric void fraction was examined. The relationship trend obtained by numerical modelling was compared with data obtained from experimental investigations. (Less)
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in
Proceedings of CHT-08 ICHMT International Symposium on Advances in Computational Heat Transfer
pages
337 - 352
conference name
CHT-08 ICHMT symposium on Advances in Computational Heat Transfer
language
English
LU publication?
yes
id
f44b89cc-e1c1-41d4-8cc7-d65d76d351ee (old id 1272932)
alternative location
http://www.edata-center.com/proceedings/1bb331655c289a0a,7b3a3e4b261b8fb8,3863dbe66c138184.html
date added to LUP
2008-12-08 13:05:54
date last changed
2016-04-16 12:26:44
@misc{f44b89cc-e1c1-41d4-8cc7-d65d76d351ee,
  abstract     = {This work details investigation of two-phase aqueous foam flow, which is applicable for developing energy-efficient heat exchangers. In such heat exchangers, heat transfer rates are enhanced due to the structure and properties of aqueous foam, namely gas bubbles separated by a thin liquid film. Aqueous foam is noted to have an especially large inter-phase contact surface and reduced surface tension when compared to pure liquids. However, the foam flow in a channel provided with a heated surface (representing a typical heat exchanger element) invokes rearrangement and collision of foam bubbles. This in turn induces changes in local foam velocity, redistribution of volumetric void fraction and temperature. To study this phenomenon, the finite volume method was applied, which was implemented in FLUENT software (version 6.2). The computation domain consists of a rectangular channel with heat pipe located in a middle of a channel. The influence of different velocities and values of volumetric void fraction was examined. The relationship trend obtained by numerical modelling was compared with data obtained from experimental investigations.},
  author       = {Gabrielaitiene, Irina and Sundén, Bengt and Gylys, J.},
  language     = {eng},
  pages        = {337--352},
  series       = {Proceedings of CHT-08 ICHMT International Symposium on Advances in Computational Heat Transfer},
  title        = {Numerical investigation of two-phase aqueous foam flow for heat exchanger applications},
  year         = {2008},
}