TY - JOUR
T1 - Numerical computation of natural convective heat transport within nanofluids filled semi-circular shaped enclosure using nonhomogeneous dynamic model
AU - Uddin, M. J.
AU - Rahman, M. M.
N1 - Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2017/3
Y1 - 2017/3
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.
KW - Finite element method
KW - Heat transfer
KW - Nanofluids
KW - Nanoparticles
KW - Nonhomogeneous dynamic model
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U2 - 10.1016/j.tsep.2017.02.001
DO - 10.1016/j.tsep.2017.02.001
M3 - Article
AN - SCOPUS:85037714961
SN - 2451-9049
VL - 1
SP - 25
EP - 38
JO - Thermal Science and Engineering Progress
JF - Thermal Science and Engineering Progress
ER -