### Abstract

The steady laminar mixed convection boundary layer flow from a horizontal circular cylinder in a nanofluid embedded in a porous medium, which is maintained at a constant surface heat flux, has been studied by using the Buongiorno–Darcy nanofluid model 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 known as the Keller box method. The solutions for the flow and heat transfer characteristics are evaluated numerically and studied for various values of the governing parameters, namely the Lewis number, Brownian number, mixed convection parameter, buoyancy ratio parameter and thermophoresis parameter. It is also found that the boundary layer separation occurs at the opposing fluid flow, that is when the mixed convection parameter is negative. It is also observed that increasing the mixed convection parameter delays the boundary layer separation and the separation can be completely suppressed for sufficiently large values of the mixed convection parameter. The Brownian and buoyancy ratio parameters appear to affect the fluid flow and heat transfer profiles.

Original language | English |
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Pages (from-to) | 1-9 |

Number of pages | 9 |

Journal | Heat and Mass Transfer/Waerme- und Stoffuebertragung |

DOIs | |

Publication status | Accepted/In press - 18 Nov 2015 |

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### ASJC Scopus subject areas

- Condensed Matter Physics
- Fluid Flow and Transfer Processes

### Cite this

*Heat and Mass Transfer/Waerme- und Stoffuebertragung*, 1-9. https://doi.org/10.1007/s00231-015-1720-2

**Mixed convection flow over a horizontal circular cylinder with constant heat flux embedded in a porous medium filled by a nanofluid : Buongiorno–Darcy model.** / Tham, Leony; Mohd. Nazar, Roslinda; Pop, Ioan.

Research output: Contribution to journal › Article

*Heat and Mass Transfer/Waerme- und Stoffuebertragung*, pp. 1-9. https://doi.org/10.1007/s00231-015-1720-2

}

TY - JOUR

T1 - Mixed convection flow over a horizontal circular cylinder with constant heat flux embedded in a porous medium filled by a nanofluid

T2 - Buongiorno–Darcy model

AU - Tham, Leony

AU - Mohd. Nazar, Roslinda

AU - Pop, Ioan

PY - 2015/11/18

Y1 - 2015/11/18

N2 - The steady laminar mixed convection boundary layer flow from a horizontal circular cylinder in a nanofluid embedded in a porous medium, which is maintained at a constant surface heat flux, has been studied by using the Buongiorno–Darcy nanofluid model 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 known as the Keller box method. The solutions for the flow and heat transfer characteristics are evaluated numerically and studied for various values of the governing parameters, namely the Lewis number, Brownian number, mixed convection parameter, buoyancy ratio parameter and thermophoresis parameter. It is also found that the boundary layer separation occurs at the opposing fluid flow, that is when the mixed convection parameter is negative. It is also observed that increasing the mixed convection parameter delays the boundary layer separation and the separation can be completely suppressed for sufficiently large values of the mixed convection parameter. The Brownian and buoyancy ratio parameters appear to affect the fluid flow and heat transfer profiles.

AB - The steady laminar mixed convection boundary layer flow from a horizontal circular cylinder in a nanofluid embedded in a porous medium, which is maintained at a constant surface heat flux, has been studied by using the Buongiorno–Darcy nanofluid model 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 known as the Keller box method. The solutions for the flow and heat transfer characteristics are evaluated numerically and studied for various values of the governing parameters, namely the Lewis number, Brownian number, mixed convection parameter, buoyancy ratio parameter and thermophoresis parameter. It is also found that the boundary layer separation occurs at the opposing fluid flow, that is when the mixed convection parameter is negative. It is also observed that increasing the mixed convection parameter delays the boundary layer separation and the separation can be completely suppressed for sufficiently large values of the mixed convection parameter. The Brownian and buoyancy ratio parameters appear to affect the fluid flow and heat transfer profiles.

UR - http://www.scopus.com/inward/record.url?scp=84947442207&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84947442207&partnerID=8YFLogxK

U2 - 10.1007/s00231-015-1720-2

DO - 10.1007/s00231-015-1720-2

M3 - Article

AN - SCOPUS:84947442207

SP - 1

EP - 9

JO - Heat and Mass Transfer

JF - Heat and Mass Transfer

SN - 0947-7411

ER -