Natural convection heat transfer enhancement of different nanofluids by adding dimple fins on a vertical channel wall

Milad Gholami; Mohammad Reza Nazari; Mohammad Hossien Talebi; Farzad Pourfattah; Omid Ali Akbari; Davood Toghraie

doi:10.1016/j.cjche.2019.11.001

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Natural convection heat transfer enhancement of different nanofluids by adding dimple fins on a vertical channel wall

Fluid Dynamics and Transport Phenomena | Updated：2026-01-06

- Natural convection heat transfer enhancement of different nanofluids by adding dimple fins on a vertical channel wall
- Chinese Journal of Chemical Engineering Vol. 28, Issue 3, Pages: 643-659(2020)
- Affiliations：
  
  1. Department of Mechanical Engineering, Yazd University, Yazd,Iran
  2. School of Mechanical Engineering, Science & Arts University, Yazd,Iran
  3. Mechanical Engineering Department University of Kashan, Kashan,Iran
  4. Young Researchers and Elite Club, Khomeinishahr Branch, Islamic Azad University, Khomeinishahr,Iran
  5. Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Khomeinishahr,Iran
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2019.11.001
  CLC：
- Published：2020
- Accepted：
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Milad Gholami, Mohammad Reza Nazari, Mohammad Hossien Talebi, Farzad Pourfattah, Omid Ali Akbari, Davood Toghraie. Natural convection heat transfer enhancement of different nanofluids by adding dimple fins on a vertical channel wall[J]. Chinese Journal of Chemical Engineering, 2020, 28(3): 643-659.
DOI：

Milad Gholami, Mohammad Reza Nazari, Mohammad Hossien Talebi, Farzad Pourfattah, Omid Ali Akbari, Davood Toghraie. Natural convection heat transfer enhancement of different nanofluids by adding dimple fins on a vertical channel wall[J]. Chinese Journal of Chemical Engineering, 2020, 28(3): 643-659. DOI： 10.1016/j.cjche.2019.11.001.

摘要

Abstract

In this numerical study

natural flow and heat transfer of nanofluids with Al

TiO

Cu and CNT nanoparticles in a vertical channel with dimpled fins at Rayleigh number (

) of

= 3.25×10

= 1×10

are investigated by using the finite volume method. The obtained results revealed that

using CNT in volume fractions of 2% and 4% leads to significant heat transfer and at

= 6%

using TiO

nanoparticles has a great effect on Nu number enhancement. Also

using solid nanoparticles in base fluid causes more uniform heat transfer distribution

especially in areas close to heated surface and by adding more volume fraction in base fluid

temperature level reduces. In general

according to temperature contours

reduction of wall temperature depends on the increase of Ra and volume fraction and the type of solid nanoparticles.

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Related Institution

Department of Mechanical Engineering, College of Engineering, University of Zakho, Zakho

Department of Mechanical Engineering, University of Kashan, Kashan

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Energy Research Center, Amirkabir University of Technology, Hafez Ave., P.O. Box 115916-3431, Tehran

Department of Mechanical Engineering, Amirkabir University of Technology, Hafez Ave., P.O. Box 115916-3431, Tehran

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