Lattice Boltzmann simulation for natural convection of supercritical CO2 in an inclined square cavity
International Journal of Numerical Methods for Heat & Fluid Flow
ISSN: 0961-5539
Article publication date: 25 November 2019
Issue publication date: 16 June 2020
Abstract
Purpose
This study aims to show the importance of natural convection of supercritical fluid in an inclined cavity. The heat transfer performance of natural convection can be improved.
Design/methodology/approach
A model of an inclined cavity was set up to simulate the natural convection of supercritical fluid. The influence of inclined angles (30 to approximately 90°) and pressures (8 to approximately 12 MPa) are analyzed. To ascertain flow and heat transfer of supercritical fluid natural convection, this paper conducts a numerical investigation using the lattice Boltzmann method (LBM), which is proven to be precise and convenient.
Findings
The results show that the higher heat transfer performance can be obtained with an inclined angle of 30°. It is also presented that the heat transfer performance under pressure of 10 MPa is the best. In addition, common criterion number correlations of average Nusselt number are also fitted.
Originality/value
These study results can provide a theoretical reference for the study of heat transfer of supercritical fluid natural convection in engineering.
Keywords
Acknowledgements
Conflicts of interests: The authors declare that there are no conflicts of interest regarding the publication of this paper.
Citation
Lu, S., Zhu, J., Gao, D., Chen, W. and Li, X. (2020), "Lattice Boltzmann simulation for natural convection of supercritical CO2 in an inclined square cavity", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 30 No. 7, pp. 3635-3652. https://doi.org/10.1108/HFF-08-2019-0641
Publisher
:Emerald Publishing Limited
Copyright © 2019, Emerald Publishing Limited