The effects of porosity and permeability on fluid flow and heat transfer of multi walled carbon nano-tubes suspended in oil (MWCNT/Oil nano-fluid) in a microchannel filled with a porous medium

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• 作者：Mehdi Nojoomizadeh^a ; ^{m_nojoomizadeh@yahoo.com" class="auth_mail" title="E-mail the corresponding author} ; Arash Karimipour^b ; ^{arashkarimipour@gmail.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Carbon nano-tubes ; Nano-fluid ; Porous media ; Microchannel ; Slip flow
• 刊名：Physica E: Low-dimensional Systems and Nanostructures
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：84
• 期：Complete
• 页码：423-433
• 全文大小：2953 K

文摘

The forced convection heat transfer and laminar flow in a two-dimensional microchannel filled with a porous medium is numerically investigated. The nano-particles which have been used are multi walled carbon nano-tubes (MWCNT) suspended in oil as the based fluid. The assumption of no-slip condition between the base fluid and nano-particles as well as the thermal equilibrium between them allows us to study the nanofluid in a single phase. The nanofluid flow through the microchannel has been modeled using the Darcy–Forchheimer equation. It is also assumed that there is a thermal equilibrium between the solid phase and the nanofluid for energy transfer. The walls of the microchannel are under the influence of a fluctuating heat flux. Also, the slip velocity boundary condition has been assumed along the walls. The effects of Darcy number, porosity and slip coefficients and Reynolds number on the velocity and temperature profiles and Nusselt number will be studied in this research.