Experimental study of nanofluid flow and heat transfer over microscale backward- and forward-facing steps

A. Sh Kherbeet; H. A. Mohammed; B. H. Salman; Hamdi E. Ahmed; Omer A. Alawi; M. M. Rashidi

doi:10.1016/j.expthermflusci.2015.02.023

Experimental study of nanofluid flow and heat transfer over microscale backward- and forward-facing steps

A. Sh Kherbeet^*
, H. A. Mohammed
, B. H. Salman
, Hamdi E. Ahmed
, Omer A. Alawi
, M. M. Rashidi

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

82 Scopus citations

Abstract

This paper investigates experimentally the effects of laminar nanofluid flow over the microscale backward-facing step (MBFS) and forward-facing step (MFFS) on the heat transfer characteristics. The experiments were implemented on MBFS and MFFS with a step height of 600μm. Both MBFS and MFFS have the upstream and downstream lengths of 0.1m and 0.15m respectively. The Reynolds number ranged of 280-480. The concentrations of SiO₂ nanoparticle valued at 0.005 and 0.01 with a diameter of 30nm were immersed in a distilled water. The experimental results revealed that the concentration of 0.01 water-SiO₂ nanofluid recorded the highest Nusselt number. The comparison between MBFS and MFFS revealed that the highest Nusselt number is obtained through the use of the MFFS, which is approximately twice that of MBFS. However, the friction factor recorded a higher value for MFFS. The experimental results were in a good agreement with the numerical published results.

Original language	English
Pages (from-to)	13-21
Number of pages	9
Journal	Experimental Thermal and Fluid Science
Volume	65
DOIs	https://doi.org/10.1016/j.expthermflusci.2015.02.023
State	Published - 1 Jul 2015
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2015 Elsevier Inc.

Keywords

Experimental
Forced convection
Heat transfer
Microscale backward-facing step
Microscale forward-facing step
Nanofluids

ASJC Scopus subject areas

General Chemical Engineering
Nuclear Energy and Engineering
Aerospace Engineering
Mechanical Engineering
Fluid Flow and Transfer Processes

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10.1016/j.expthermflusci.2015.02.023

Cite this

@article{c853ffa7c56c4aabb0eebb477a99e344,

title = "Experimental study of nanofluid flow and heat transfer over microscale backward- and forward-facing steps",

abstract = "This paper investigates experimentally the effects of laminar nanofluid flow over the microscale backward-facing step (MBFS) and forward-facing step (MFFS) on the heat transfer characteristics. The experiments were implemented on MBFS and MFFS with a step height of 600μm. Both MBFS and MFFS have the upstream and downstream lengths of 0.1m and 0.15m respectively. The Reynolds number ranged of 280-480. The concentrations of SiO2 nanoparticle valued at 0.005 and 0.01 with a diameter of 30nm were immersed in a distilled water. The experimental results revealed that the concentration of 0.01 water-SiO2 nanofluid recorded the highest Nusselt number. The comparison between MBFS and MFFS revealed that the highest Nusselt number is obtained through the use of the MFFS, which is approximately twice that of MBFS. However, the friction factor recorded a higher value for MFFS. The experimental results were in a good agreement with the numerical published results.",

keywords = "Experimental, Forced convection, Heat transfer, Microscale backward-facing step, Microscale forward-facing step, Nanofluids",

author = "Kherbeet, \{A. Sh\} and Mohammed, \{H. A.\} and Salman, \{B. H.\} and Ahmed, \{Hamdi E.\} and Alawi, \{Omer A.\} and Rashidi, \{M. M.\}",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier Inc.",

year = "2015",

month = jul,

day = "1",

doi = "10.1016/j.expthermflusci.2015.02.023",

language = "English",

volume = "65",

pages = "13--21",

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TY - JOUR

T1 - Experimental study of nanofluid flow and heat transfer over microscale backward- and forward-facing steps

AU - Kherbeet, A. Sh

AU - Mohammed, H. A.

AU - Salman, B. H.

AU - Ahmed, Hamdi E.

AU - Alawi, Omer A.

AU - Rashidi, M. M.

PY - 2015/7/1

Y1 - 2015/7/1

N2 - This paper investigates experimentally the effects of laminar nanofluid flow over the microscale backward-facing step (MBFS) and forward-facing step (MFFS) on the heat transfer characteristics. The experiments were implemented on MBFS and MFFS with a step height of 600μm. Both MBFS and MFFS have the upstream and downstream lengths of 0.1m and 0.15m respectively. The Reynolds number ranged of 280-480. The concentrations of SiO2 nanoparticle valued at 0.005 and 0.01 with a diameter of 30nm were immersed in a distilled water. The experimental results revealed that the concentration of 0.01 water-SiO2 nanofluid recorded the highest Nusselt number. The comparison between MBFS and MFFS revealed that the highest Nusselt number is obtained through the use of the MFFS, which is approximately twice that of MBFS. However, the friction factor recorded a higher value for MFFS. The experimental results were in a good agreement with the numerical published results.

AB - This paper investigates experimentally the effects of laminar nanofluid flow over the microscale backward-facing step (MBFS) and forward-facing step (MFFS) on the heat transfer characteristics. The experiments were implemented on MBFS and MFFS with a step height of 600μm. Both MBFS and MFFS have the upstream and downstream lengths of 0.1m and 0.15m respectively. The Reynolds number ranged of 280-480. The concentrations of SiO2 nanoparticle valued at 0.005 and 0.01 with a diameter of 30nm were immersed in a distilled water. The experimental results revealed that the concentration of 0.01 water-SiO2 nanofluid recorded the highest Nusselt number. The comparison between MBFS and MFFS revealed that the highest Nusselt number is obtained through the use of the MFFS, which is approximately twice that of MBFS. However, the friction factor recorded a higher value for MFFS. The experimental results were in a good agreement with the numerical published results.

KW - Experimental

KW - Forced convection

KW - Heat transfer

KW - Microscale backward-facing step

KW - Microscale forward-facing step

KW - Nanofluids

UR - https://www.scopus.com/pages/publications/84924785608

U2 - 10.1016/j.expthermflusci.2015.02.023

DO - 10.1016/j.expthermflusci.2015.02.023

M3 - Article

AN - SCOPUS:84924785608

SN - 0894-1777

VL - 65

SP - 13

EP - 21

JO - Experimental Thermal and Fluid Science

JF - Experimental Thermal and Fluid Science

ER -

Experimental study of nanofluid flow and heat transfer over microscale backward- and forward-facing steps

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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