Abstract
The problem of natural convection induced by a temperature difference between an outer porous enclosure and an inner circular cylinder is studied in this paper. The fluid in the porous enclosure is a water-based nanofluids containing Ag, Cu, Al<inf>2</inf>O<inf>3</inf>, or TiO<inf>2</inf> nanoparticles. The coupled momentum and energy equations have been solved numerically over a wide range of values of the solid volume fraction, the Rayleigh number, the cylinder radius, and various temperature conditions of the bottom wall. It is found that there exists an optimum cylinder radius, below which the increasing cylinder radius increases the strength of flow circulation and above which the cylinder radius decreases the strength of flow circulation. The heat transfer rate increases linearly by increasing the nanoparticles concentration for all cylinder radius and Rayleigh number.
| Original language | English |
|---|---|
| Pages (from-to) | 559-567 |
| Number of pages | 9 |
| Journal | Journal of Porous Media |
| Volume | 18 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2015 |
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Keywords
- Darcy's law
- Nanofluids
- Natural convection
ASJC Scopus subject areas
- Mechanical Engineering
- Mechanics of Materials
- Materials Science(all)
- Condensed Matter Physics
- Modelling and Simulation
- Biomedical Engineering
Cite this
Natural convection from a cylinder in square porous enclosure filled with nanofluids. / Saleh, H.; Hashim, Ishak.
In: Journal of Porous Media, Vol. 18, No. 6, 2015, p. 559-567.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Natural convection from a cylinder in square porous enclosure filled with nanofluids
AU - Saleh, H.
AU - Hashim, Ishak
PY - 2015
Y1 - 2015
N2 - The problem of natural convection induced by a temperature difference between an outer porous enclosure and an inner circular cylinder is studied in this paper. The fluid in the porous enclosure is a water-based nanofluids containing Ag, Cu, Al2O3, or TiO2 nanoparticles. The coupled momentum and energy equations have been solved numerically over a wide range of values of the solid volume fraction, the Rayleigh number, the cylinder radius, and various temperature conditions of the bottom wall. It is found that there exists an optimum cylinder radius, below which the increasing cylinder radius increases the strength of flow circulation and above which the cylinder radius decreases the strength of flow circulation. The heat transfer rate increases linearly by increasing the nanoparticles concentration for all cylinder radius and Rayleigh number.
AB - The problem of natural convection induced by a temperature difference between an outer porous enclosure and an inner circular cylinder is studied in this paper. The fluid in the porous enclosure is a water-based nanofluids containing Ag, Cu, Al2O3, or TiO2 nanoparticles. The coupled momentum and energy equations have been solved numerically over a wide range of values of the solid volume fraction, the Rayleigh number, the cylinder radius, and various temperature conditions of the bottom wall. It is found that there exists an optimum cylinder radius, below which the increasing cylinder radius increases the strength of flow circulation and above which the cylinder radius decreases the strength of flow circulation. The heat transfer rate increases linearly by increasing the nanoparticles concentration for all cylinder radius and Rayleigh number.
KW - Darcy's law
KW - Nanofluids
KW - Natural convection
UR - http://www.scopus.com/inward/record.url?scp=84940103151&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84940103151&partnerID=8YFLogxK
U2 - 10.1615/JPorMedia.v18.i6.10
DO - 10.1615/JPorMedia.v18.i6.10
M3 - Article
AN - SCOPUS:84940103151
VL - 18
SP - 559
EP - 567
JO - Journal of Porous Media
JF - Journal of Porous Media
SN - 1091-028X
IS - 6
ER -