CFD models comparative study on nanofluids subcooled flow boiling in a vertical pipe

Behroyan, Iman and Ganesan, Poo Balan and He, Shuisheng and Sivasankaran, Sivanandam (2018) CFD models comparative study on nanofluids subcooled flow boiling in a vertical pipe. Numerical Heat Transfer, Part A: Applications, 73 (1). pp. 55-74. ISSN 1040-7782

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Official URL: https://doi.org/10.1080/10407782.2017.1420299

Abstract

The effects of subcooled flow boiling of nanofluids (Al2O3/water and Cu/water) through a vertical heated pipe are investigated numerically considering a number real flow factors such as uneven particle distributions and particle deposition on the wall surface. The results from the Eulerian–Eulerian two-phase model (liquid/nanofluid–gas) and those of the Eulerian–Lagrangian three-phase model (liquid–gas particles) are compared in detail. For the heat transfer coefficient prediction, the latter model gives about 6% error, whereas the Eulerian–Eulerian model gives about 12% error when it is compared with Chen’s correlation. The uneven distribution of nanoparticles concentrations, i.e., lower near the tube wall and higher at the pipe center, is well predicted by the Eulerian–Lagrangian model. On top that, for the first time, the changes on heating surface wettability induced by nanoparticles deposition is included via user define functions.

Item Type: Article
Uncontrolled Keywords: Comparative studies; Eulerian two-phase models; Heating surfaces; Lagrangian models; Particle depositions; Particle distributions; Subcooled flow boiling; Three phase model
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 13 Sep 2019 02:49
Last Modified: 13 Sep 2019 02:49
URI: http://eprints.um.edu.my/id/eprint/22325

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