Free Convection in an Open Triangular Cavity Filled with a Nanofluid under the Effects of Brownian Diffusion, Thermophoresis and Local Heater

Nadezhda S. Bondareva, Mikhail A. Sheremet, Hakan F. Oztop, Nidal Abu-Hamdeh

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Natural convection of a water-based nanofluid in a partially open triangular cavity with a local heat source of constant temperature under the effect of Brownian diffusion and thermophoresis has been analyzed numerically. Governing equations formulated in dimensionless stream function and vorticity variables on the basis of two-phase nanofluid model with corresponding initial and boundary conditions have been solved by finite difference method. Detailed study of the effect of Rayleigh number, buoyancy-ratio parameter, and local heater location on fluid flow and heat transfer has been carried out. It has been revealed that an increase in the buoyancy force magnitude leads to homogenization of nanoparticles distribution inside the cavity. A growth of a distance between the heater and the cavity corner illustrates the heat transfer enhancement.

Original languageEnglish
Article number042502
JournalJournal of Heat Transfer
Volume140
Issue number4
DOIs
Publication statusPublished - 1 Apr 2018

Fingerprint

Thermophoresis
thermophoresis
Buoyancy
Natural convection
heaters
free convection
Heat transfer
buoyancy
cavities
Vorticity
heat transfer
Finite difference method
Flow of fluids
Boundary conditions
Rayleigh number
heat sources
homogenizing
Nanoparticles
vorticity
fluid flow

Keywords

  • Brownian diffusion
  • free convection
  • local heater
  • nanofluid
  • partially open triangular cavity
  • thermophoresis

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Free Convection in an Open Triangular Cavity Filled with a Nanofluid under the Effects of Brownian Diffusion, Thermophoresis and Local Heater. / Bondareva, Nadezhda S.; Sheremet, Mikhail A.; Oztop, Hakan F.; Abu-Hamdeh, Nidal.

In: Journal of Heat Transfer, Vol. 140, No. 4, 042502, 01.04.2018.

Research output: Contribution to journalArticle

@article{9c8891f2ed124d6aa18d0b60664ede4e,
title = "Free Convection in an Open Triangular Cavity Filled with a Nanofluid under the Effects of Brownian Diffusion, Thermophoresis and Local Heater",
abstract = "Natural convection of a water-based nanofluid in a partially open triangular cavity with a local heat source of constant temperature under the effect of Brownian diffusion and thermophoresis has been analyzed numerically. Governing equations formulated in dimensionless stream function and vorticity variables on the basis of two-phase nanofluid model with corresponding initial and boundary conditions have been solved by finite difference method. Detailed study of the effect of Rayleigh number, buoyancy-ratio parameter, and local heater location on fluid flow and heat transfer has been carried out. It has been revealed that an increase in the buoyancy force magnitude leads to homogenization of nanoparticles distribution inside the cavity. A growth of a distance between the heater and the cavity corner illustrates the heat transfer enhancement.",
keywords = "Brownian diffusion, free convection, local heater, nanofluid, partially open triangular cavity, thermophoresis",
author = "Bondareva, {Nadezhda S.} and Sheremet, {Mikhail A.} and Oztop, {Hakan F.} and Nidal Abu-Hamdeh",
year = "2018",
month = "4",
day = "1",
doi = "10.1115/1.4038192",
language = "English",
volume = "140",
journal = "Journal of Heat Transfer",
issn = "0022-1481",
publisher = "American Society of Mechanical Engineers(ASME)",
number = "4",

}

TY - JOUR

T1 - Free Convection in an Open Triangular Cavity Filled with a Nanofluid under the Effects of Brownian Diffusion, Thermophoresis and Local Heater

AU - Bondareva, Nadezhda S.

AU - Sheremet, Mikhail A.

AU - Oztop, Hakan F.

AU - Abu-Hamdeh, Nidal

PY - 2018/4/1

Y1 - 2018/4/1

N2 - Natural convection of a water-based nanofluid in a partially open triangular cavity with a local heat source of constant temperature under the effect of Brownian diffusion and thermophoresis has been analyzed numerically. Governing equations formulated in dimensionless stream function and vorticity variables on the basis of two-phase nanofluid model with corresponding initial and boundary conditions have been solved by finite difference method. Detailed study of the effect of Rayleigh number, buoyancy-ratio parameter, and local heater location on fluid flow and heat transfer has been carried out. It has been revealed that an increase in the buoyancy force magnitude leads to homogenization of nanoparticles distribution inside the cavity. A growth of a distance between the heater and the cavity corner illustrates the heat transfer enhancement.

AB - Natural convection of a water-based nanofluid in a partially open triangular cavity with a local heat source of constant temperature under the effect of Brownian diffusion and thermophoresis has been analyzed numerically. Governing equations formulated in dimensionless stream function and vorticity variables on the basis of two-phase nanofluid model with corresponding initial and boundary conditions have been solved by finite difference method. Detailed study of the effect of Rayleigh number, buoyancy-ratio parameter, and local heater location on fluid flow and heat transfer has been carried out. It has been revealed that an increase in the buoyancy force magnitude leads to homogenization of nanoparticles distribution inside the cavity. A growth of a distance between the heater and the cavity corner illustrates the heat transfer enhancement.

KW - Brownian diffusion

KW - free convection

KW - local heater

KW - nanofluid

KW - partially open triangular cavity

KW - thermophoresis

UR - http://www.scopus.com/inward/record.url?scp=85039150013&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85039150013&partnerID=8YFLogxK

U2 - 10.1115/1.4038192

DO - 10.1115/1.4038192

M3 - Article

VL - 140

JO - Journal of Heat Transfer

JF - Journal of Heat Transfer

SN - 0022-1481

IS - 4

M1 - 042502

ER -