### Abstract

The laminar mixed convection boundary layer flow from a horizontal circular cylinder in a nanofluid, which is maintained at a constant surface heat flux, has been studied for both cases of a heated and cooled cylinder. The resulting system of nonlinear partial differential equations is solved numerically using an implicit finite-difference scheme. Three different types of nanoparticles are considered, namely Cu, Al_{2}O_{3} and TiO_{2}. The solutions for the flow and heat transfer characteristics are evaluated numerically and studied for various values of the governing parameters, namely the nanoparticle volume fraction φ and the mixed convection parameter λ. It is worth mentioning that heating the cylinder ( λ >0) delays the separation of the boundary layer and if the cylinder is hot enough (large values of λ >0), then it is suppressed completely. On the other hand, cooling the cylinder ( λ < 0) brings the boundary layer separation point nearer to the lower stagnation point and for a sufficiently cold cylinder (large values of λ < 0), the flow completely detaches from the cylinder.

Original language | English |
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Title of host publication | Proceedings of CHT-12. ICHMT International Symposium on Advances in Computational Heat Transfer, 2012 |

Publisher | Begell House Inc. |

Pages | 949-969 |

Number of pages | 21 |

ISBN (Print) | 9781567003031 |

DOIs | |

Publication status | Published - 1 Jan 2012 |

Event | International Symposium on Advances in Computational Heat Transfer, CHT 2012 - Bath, United Kingdom Duration: 1 Jul 2012 → 6 Jul 2012 |

### Publication series

Name | International Symposium on Advances in Computational Heat Transfer |
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ISSN (Print) | 2578-5486 |

### Conference

Conference | International Symposium on Advances in Computational Heat Transfer, CHT 2012 |
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Country | United Kingdom |

City | Bath |

Period | 1/7/12 → 6/7/12 |

### Fingerprint

### ASJC Scopus subject areas

- Fluid Flow and Transfer Processes
- Mechanical Engineering
- Condensed Matter Physics
- Computer Science Applications

### Cite this

*Proceedings of CHT-12. ICHMT International Symposium on Advances in Computational Heat Transfer, 2012*(pp. 949-969). (International Symposium on Advances in Computational Heat Transfer). Begell House Inc.. https://doi.org/10.1615/ICHMT.2012.CHT-12.580

**Mixed convection flow over a horizontal circular cylinder with a constant surface heat flux in a nanofluid.** / Tham, Leony; Mohd. Nazar, Roslinda; Pop, Ioan.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

*Proceedings of CHT-12. ICHMT International Symposium on Advances in Computational Heat Transfer, 2012.*International Symposium on Advances in Computational Heat Transfer, Begell House Inc., pp. 949-969, International Symposium on Advances in Computational Heat Transfer, CHT 2012, Bath, United Kingdom, 1/7/12. https://doi.org/10.1615/ICHMT.2012.CHT-12.580

}

TY - GEN

T1 - Mixed convection flow over a horizontal circular cylinder with a constant surface heat flux in a nanofluid

AU - Tham, Leony

AU - Mohd. Nazar, Roslinda

AU - Pop, Ioan

PY - 2012/1/1

Y1 - 2012/1/1

N2 - The laminar mixed convection boundary layer flow from a horizontal circular cylinder in a nanofluid, which is maintained at a constant surface heat flux, has been studied for both cases of a heated and cooled cylinder. The resulting system of nonlinear partial differential equations is solved numerically using an implicit finite-difference scheme. Three different types of nanoparticles are considered, namely Cu, Al2O3 and TiO2. The solutions for the flow and heat transfer characteristics are evaluated numerically and studied for various values of the governing parameters, namely the nanoparticle volume fraction φ and the mixed convection parameter λ. It is worth mentioning that heating the cylinder ( λ >0) delays the separation of the boundary layer and if the cylinder is hot enough (large values of λ >0), then it is suppressed completely. On the other hand, cooling the cylinder ( λ < 0) brings the boundary layer separation point nearer to the lower stagnation point and for a sufficiently cold cylinder (large values of λ < 0), the flow completely detaches from the cylinder.

AB - The laminar mixed convection boundary layer flow from a horizontal circular cylinder in a nanofluid, which is maintained at a constant surface heat flux, has been studied for both cases of a heated and cooled cylinder. The resulting system of nonlinear partial differential equations is solved numerically using an implicit finite-difference scheme. Three different types of nanoparticles are considered, namely Cu, Al2O3 and TiO2. The solutions for the flow and heat transfer characteristics are evaluated numerically and studied for various values of the governing parameters, namely the nanoparticle volume fraction φ and the mixed convection parameter λ. It is worth mentioning that heating the cylinder ( λ >0) delays the separation of the boundary layer and if the cylinder is hot enough (large values of λ >0), then it is suppressed completely. On the other hand, cooling the cylinder ( λ < 0) brings the boundary layer separation point nearer to the lower stagnation point and for a sufficiently cold cylinder (large values of λ < 0), the flow completely detaches from the cylinder.

UR - http://www.scopus.com/inward/record.url?scp=85066249529&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85066249529&partnerID=8YFLogxK

U2 - 10.1615/ICHMT.2012.CHT-12.580

DO - 10.1615/ICHMT.2012.CHT-12.580

M3 - Conference contribution

AN - SCOPUS:85066249529

SN - 9781567003031

T3 - International Symposium on Advances in Computational Heat Transfer

SP - 949

EP - 969

BT - Proceedings of CHT-12. ICHMT International Symposium on Advances in Computational Heat Transfer, 2012

PB - Begell House Inc.

ER -