Numerical investigation of unsteady multiphase nanofluid-free convection flow about a vertical cylinder with non-uniform temperature

A numerical investigation on the transient-free convection flow of the multiphase nanofluid past a vertical cylinder, which has a power-law variation surface temperature along with the height, is presented. The problem has typical engineering applications involving cooling of vertical cylindrical ro...

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Main Authors: Narahari, M., Suresh Kumar Raju, S., Pendyala, R., Ilyas, S.U.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.23234 /
Published: American Society of Mechanical Engineers (ASME) 2020
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85091511525&doi=10.1115%2f1.4044905&partnerID=40&md5=5503a53a3f8c0959b25855672e5d576b
http://eprints.utp.edu.my/23234/
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spelling utp-eprints.232342021-08-19T06:08:59Z Numerical investigation of unsteady multiphase nanofluid-free convection flow about a vertical cylinder with non-uniform temperature Narahari, M. Suresh Kumar Raju, S. Pendyala, R. Ilyas, S.U. A numerical investigation on the transient-free convection flow of the multiphase nanofluid past a vertical cylinder, which has a power-law variation surface temperature along with the height, is presented. The problem has typical engineering applications involving cooling of vertical cylindrical rods in mechanical/manufacturing systems, cooling of nuclear reactors, and the design of other advanced cooling technologies. Buongiorno's model is applied in this research, which incorporates thermophoresis and Brownian diffusion effects of nanoparticles. The zero-volume flux condition is implemented for nanoparticle concentration at the boundary to obtain realistic results. A robust second-order accurate finite-difference scheme of Crank-Nicolson type is applied to tackle the system of coupled non-linear partial differential equations numerically. The impacts of time, variable surface temperature power-law exponent, Brownian and thermophoresis parameters are investigated on nanofluid flow and heat transfer aspects. The decisive finding suggests that the effect of the power-law exponent of the variable wall temperature is to reduce the nanoparticle relocation, velocity, and temperature in the nanofluid boundary layer causing the heat transfer enhancement. The skin-friction decreased significantly with the rise of the power-law exponent of the wall temperature. The present numerical scheme is corroborated by comparing the average skin-friction results with the available literature for clear fluid. Copyright © 2019 by ASME American Society of Mechanical Engineers (ASME) 2020 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85091511525&doi=10.1115%2f1.4044905&partnerID=40&md5=5503a53a3f8c0959b25855672e5d576b Narahari, M. and Suresh Kumar Raju, S. and Pendyala, R. and Ilyas, S.U. (2020) Numerical investigation of unsteady multiphase nanofluid-free convection flow about a vertical cylinder with non-uniform temperature. Journal of Thermal Science and Engineering Applications, 12 (3). http://eprints.utp.edu.my/23234/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description A numerical investigation on the transient-free convection flow of the multiphase nanofluid past a vertical cylinder, which has a power-law variation surface temperature along with the height, is presented. The problem has typical engineering applications involving cooling of vertical cylindrical rods in mechanical/manufacturing systems, cooling of nuclear reactors, and the design of other advanced cooling technologies. Buongiorno's model is applied in this research, which incorporates thermophoresis and Brownian diffusion effects of nanoparticles. The zero-volume flux condition is implemented for nanoparticle concentration at the boundary to obtain realistic results. A robust second-order accurate finite-difference scheme of Crank-Nicolson type is applied to tackle the system of coupled non-linear partial differential equations numerically. The impacts of time, variable surface temperature power-law exponent, Brownian and thermophoresis parameters are investigated on nanofluid flow and heat transfer aspects. The decisive finding suggests that the effect of the power-law exponent of the variable wall temperature is to reduce the nanoparticle relocation, velocity, and temperature in the nanofluid boundary layer causing the heat transfer enhancement. The skin-friction decreased significantly with the rise of the power-law exponent of the wall temperature. The present numerical scheme is corroborated by comparing the average skin-friction results with the available literature for clear fluid. Copyright © 2019 by ASME
format Article
author Narahari, M.
Suresh Kumar Raju, S.
Pendyala, R.
Ilyas, S.U.
spellingShingle Narahari, M.
Suresh Kumar Raju, S.
Pendyala, R.
Ilyas, S.U.
Numerical investigation of unsteady multiphase nanofluid-free convection flow about a vertical cylinder with non-uniform temperature
author_sort Narahari, M.
title Numerical investigation of unsteady multiphase nanofluid-free convection flow about a vertical cylinder with non-uniform temperature
title_short Numerical investigation of unsteady multiphase nanofluid-free convection flow about a vertical cylinder with non-uniform temperature
title_full Numerical investigation of unsteady multiphase nanofluid-free convection flow about a vertical cylinder with non-uniform temperature
title_fullStr Numerical investigation of unsteady multiphase nanofluid-free convection flow about a vertical cylinder with non-uniform temperature
title_full_unstemmed Numerical investigation of unsteady multiphase nanofluid-free convection flow about a vertical cylinder with non-uniform temperature
title_sort numerical investigation of unsteady multiphase nanofluid-free convection flow about a vertical cylinder with non-uniform temperature
publisher American Society of Mechanical Engineers (ASME)
publishDate 2020
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85091511525&doi=10.1115%2f1.4044905&partnerID=40&md5=5503a53a3f8c0959b25855672e5d576b
http://eprints.utp.edu.my/23234/
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score 11.62408

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