Numerical computation of natural convective heat transport within nanofluids filled semi-circular shaped enclosure using nonhomogeneous dynamic model

M. J. Uddin, M. M. Rahman

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

In this paper, the problem of unsteady natural convective flow of nanofluids inside a semicircular shaped enclosure using the newly developed nonhomogeneous dynamic model has been investigated numerically. The Galerkin weighted residual finite element technique has been employed to solve the governing nonlinear and coupled dimensionless partial differential equations. The streamlines, the isotherms, and the isoconcentrations are displayed graphically to show the flow and thermal fields as well as concentration levels of nanofluid. The average Nusselt numbers at the heated wall of the enclosure for 16 types of nanofluids are calculated for different flow parameters. Comparisons are made with the numerical as well as the experimental data available in the literature. The results show that nanoparticles uniformly suspend in a base fluid when the particle diameter ranges from 1 to 10 nm. The average Nusselt number increases significantly with the increase of the nanoparticle volume fraction as well as with different shapes of nanoparticles, whereas it decreases remarkably with the increase of nanoparticles diameter. It is noted that Cu-water and CuO-water nanofluids are the best performer to enhance heat transfer rates compared to the other nanofluids considered in the analysis.

Original languageEnglish
Pages (from-to)25-38
Number of pages14
JournalThermal Science and Engineering Progress
Volume1
DOIs
Publication statusPublished - Mar 1 2017

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Enclosures
Dynamic models
Nanoparticles
Nusselt number
Water
Partial differential equations
Isotherms
Volume fraction
Heat transfer
Fluids
Hot Temperature

Keywords

  • Finite element method
  • Heat transfer
  • Nanofluids
  • Nanoparticles
  • Nonhomogeneous dynamic model

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

Cite this

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title = "Numerical computation of natural convective heat transport within nanofluids filled semi-circular shaped enclosure using nonhomogeneous dynamic model",
abstract = "In this paper, the problem of unsteady natural convective flow of nanofluids inside a semicircular shaped enclosure using the newly developed nonhomogeneous dynamic model has been investigated numerically. The Galerkin weighted residual finite element technique has been employed to solve the governing nonlinear and coupled dimensionless partial differential equations. The streamlines, the isotherms, and the isoconcentrations are displayed graphically to show the flow and thermal fields as well as concentration levels of nanofluid. The average Nusselt numbers at the heated wall of the enclosure for 16 types of nanofluids are calculated for different flow parameters. Comparisons are made with the numerical as well as the experimental data available in the literature. The results show that nanoparticles uniformly suspend in a base fluid when the particle diameter ranges from 1 to 10 nm. The average Nusselt number increases significantly with the increase of the nanoparticle volume fraction as well as with different shapes of nanoparticles, whereas it decreases remarkably with the increase of nanoparticles diameter. It is noted that Cu-water and CuO-water nanofluids are the best performer to enhance heat transfer rates compared to the other nanofluids considered in the analysis.",
keywords = "Finite element method, Heat transfer, Nanofluids, Nanoparticles, Nonhomogeneous dynamic model",
author = "Uddin, {M. J.} and Rahman, {M. M.}",
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N2 - In this paper, the problem of unsteady natural convective flow of nanofluids inside a semicircular shaped enclosure using the newly developed nonhomogeneous dynamic model has been investigated numerically. The Galerkin weighted residual finite element technique has been employed to solve the governing nonlinear and coupled dimensionless partial differential equations. The streamlines, the isotherms, and the isoconcentrations are displayed graphically to show the flow and thermal fields as well as concentration levels of nanofluid. The average Nusselt numbers at the heated wall of the enclosure for 16 types of nanofluids are calculated for different flow parameters. Comparisons are made with the numerical as well as the experimental data available in the literature. The results show that nanoparticles uniformly suspend in a base fluid when the particle diameter ranges from 1 to 10 nm. The average Nusselt number increases significantly with the increase of the nanoparticle volume fraction as well as with different shapes of nanoparticles, whereas it decreases remarkably with the increase of nanoparticles diameter. It is noted that Cu-water and CuO-water nanofluids are the best performer to enhance heat transfer rates compared to the other nanofluids considered in the analysis.

AB - In this paper, the problem of unsteady natural convective flow of nanofluids inside a semicircular shaped enclosure using the newly developed nonhomogeneous dynamic model has been investigated numerically. The Galerkin weighted residual finite element technique has been employed to solve the governing nonlinear and coupled dimensionless partial differential equations. The streamlines, the isotherms, and the isoconcentrations are displayed graphically to show the flow and thermal fields as well as concentration levels of nanofluid. The average Nusselt numbers at the heated wall of the enclosure for 16 types of nanofluids are calculated for different flow parameters. Comparisons are made with the numerical as well as the experimental data available in the literature. The results show that nanoparticles uniformly suspend in a base fluid when the particle diameter ranges from 1 to 10 nm. The average Nusselt number increases significantly with the increase of the nanoparticle volume fraction as well as with different shapes of nanoparticles, whereas it decreases remarkably with the increase of nanoparticles diameter. It is noted that Cu-water and CuO-water nanofluids are the best performer to enhance heat transfer rates compared to the other nanofluids considered in the analysis.

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