Study of Forced Convection Heat Transfer of Supercritical CO<sub>2</sub> in a Horizontal Channel by Lattice Boltzmann Method

Study of Forced Convection Heat Transfer of Supercritical CO<sub>2</sub> in a Horizontal Channel by Lattice Boltzmann Method

Year:    2010

Author:    Xiaodong Niu, Hiroshi Yamaguchi, Yuhiro Iwamoto, Xinrong Zhang, Mingjun Li, Yuhiro Iwamoto

Advances in Applied Mathematics and Mechanics, Vol. 2 (2010), Iss. 5 : pp. 564–572

Abstract

The problem of forced convection heat transfer of supercritical CO2 in a horizontal channel is investigated numerically by a lattice Boltzmann method. This study is stimulated by our recent experimental findings on solar collectors using supercritical CO2 as a working fluid, which can achieve the collector efficiency high up to 70%. To deeply understand the heat transfer characteristics of supercritical CO2 and provide a theoretical guidance for improving our current experimental system, in present study several typical experimental flow conditions are simulated. In particular, the work focuses on the convective heat transfer characteristics of supercritical CO2 flowing in a horizontal channel with mediate Reynolds numbers ranging from 210 to 840 and constant heat fluxes from 400.0 to 800.0 W/m$^2$. The simulations show that the heat transfer increases with heat flux and decreases with Reynolds number. Furthermore, the mechanisms of heat transfer enhancement of supercritical CO2 fluid are identified.

You do not have full access to this article.

Already a Subscriber? Sign in as an individual or via your institution

Journal Article Details

Publisher Name:    Global Science Press

Language:    English

DOI:    https://doi.org/10.4208/aamm.10-10S03

Advances in Applied Mathematics and Mechanics, Vol. 2 (2010), Iss. 5 : pp. 564–572

Published online:    2010-01

AMS Subject Headings:    Global Science Press

Copyright:    COPYRIGHT: © Global Science Press

Pages:    9

Keywords:   

Author Details

Xiaodong Niu

Hiroshi Yamaguchi

Yuhiro Iwamoto

Xinrong Zhang

Mingjun Li

Yuhiro Iwamoto