Skip to Main content Skip to Navigation
Journal articles

Natural convection heat transfer of nanofluids along a vertical plate embedded in porous medium

Abstract : The unsteady natural convection heat transfer of nanofluid along a vertical plate embedded in porous medium is investigated. The Darcy-Forchheimer model is used to formulate the problem. Thermal conductivity and viscosity models based on a wide range of experimental data of nanofluids and incorporating the velocity-slip effect of the nanoparticle with respect to the base fluid, i.e., Brownian diffusion is used. The effective thermal conductivity of nanofluid in porous media is calculated using copper powder as porous media. The nonlinear governing equations are solved using an unconditionally stable implicit finite difference scheme. In this study, six different types of nanofluids have been compared with respect to the heat transfer enhancement, and the effects of particle concentration, particle size, temperature of the plate, and porosity of the medium on the heat transfer enhancement and skin friction coefficient have been studied in detail. It is found that heat transfer rate increases with the increase in particle concentration up to an optimal level, but on the further increase in particle concentration, the heat transfer rate decreases. For a particular value of particle concentration, small-sized particles enhance the heat transfer rates. On the other hand, skin friction coefficients always increase with the increase in particle concentration and decrease in nanoparticle size.
Complete list of metadata

https://hal-uphf.archives-ouvertes.fr/hal-03625174
Contributor : Mylène Delrue Connect in order to contact the contributor
Submitted on : Thursday, April 28, 2022 - 5:28:14 PM
Last modification on : Thursday, April 28, 2022 - 5:41:14 PM
Long-term archiving on: : Friday, July 29, 2022 - 7:44:20 PM

File

1556-276X-8-64.pdf
Publication funded by an institution

Licence


Distributed under a Creative Commons Attribution 4.0 International License

Identifiers

Collections

Citation

Ziya Uddin, Souad Harmand. Natural convection heat transfer of nanofluids along a vertical plate embedded in porous medium. Nanoscale Research Letters, SpringerOpen, 2013, 8 (1), pp.64. ⟨10.1186/1556-276X-8-64⟩. ⟨hal-03625174⟩

Share

Metrics

Record views

26

Files downloads

5