Imperial College London
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ProfessorMartinBlunt

Faculty of Engineering, Department of Earth Science & Engineering

Chair in Flow in Porous Media
 
 
 
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Contact

 

+44 (0)20 7594 6500m.blunt Website

 
 
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Location

 

2.38ARoyal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Khoshtarash:2022:10.1016/j.applthermaleng.2022.119847,
author = {Khoshtarash, H and Siavashi, M and Ramezanpour, M and Blunt, MJ},
doi = {10.1016/j.applthermaleng.2022.119847},
journal = {Applied Thermal Engineering},
pages = {1--16},
title = {Pore-scale analysis of two-phase nanofluid flow and heat transfer in open-cell metal foams considering Brownian motion},
url = {http://dx.doi.org/10.1016/j.applthermaleng.2022.119847},
volume = {221},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Simultaneous use of porous media and nanofluids will increase the convective heat transfer multiple times compared to non-porous and pure fluid conditions. Heat transfer and flow transport of nanofluids inside porous media are usually simulated in large-scale with average properties, which are typically highly uncertain. Pore-scale simulation as an alternative approach can capture the characteristics of flow and heat transfer more accurately. Only few studies have been conducted to study nanofluid flow through porous media in pore-scale, and most of them employed single-phase approach without focus on different affective forces. This paper uses a pore-scale approach to investigate the flow characteristics and convective heat transfer of two-phase nanofluid flow in open-cell metal foams (OCMFs). Simulation of fluid flow and heat transfer is achieved by Buongiorno’s model. Therefore, a computational code through the OpenFOAM library that operates by a direct numerical simulation (DNS) approach and the finite volume method (FVM) is used. The momentum, energy, continuity, and nanoparticle distribution equations are discretized, and the SIMPLE algorithm is utilized for pressure and velocity coupling. In the present study, three OCMFs with a constant porosity (0.86) and various pore densities are investigated. Also, variations of pressure gradient, Nusselt number, and Darcy velocity are investigated as a function of pore density (as a geometric parameter), nanoparticle diameter, concentration, and Brownian motion force. The results indicate that the Brownian force enhances the heat transfer in OCMFs from 2% by up to 14% for the nanofluid flowing with 3% nanoparticle concentration. Also, increasing the diameter of nanoparticles reduces the Darcy velocity and heat transfer by up to 4%. On the other hand, increasing particle concentration from 3% to 5%, increases heat transfer by up to 10% and reduces the Darcy velocity by up to 9%. Finally, doubling the pore density d
AU  - Khoshtarash,H
AU  - Siavashi,M
AU  - Ramezanpour,M
AU  - Blunt,MJ
DO  - 10.1016/j.applthermaleng.2022.119847
EP  - 16
PY  - 2022///
SN  - 1359-4311
SP  - 1
TI  - Pore-scale analysis of two-phase nanofluid flow and heat transfer in open-cell metal foams considering Brownian motion
T2  - Applied Thermal Engineering
UR  - http://dx.doi.org/10.1016/j.applthermaleng.2022.119847
UR  - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000908786100001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
UR  - https://www.sciencedirect.com/science/article/pii/S135943112201777X?via%3Dihub
VL  - 221
ER  -
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