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<p>This study scrutinizes the aspects of transferring the heat and the generated irreversibility from a hot wavy wall covered by a surface wavy porous layer. This combined wall represents a heat sink and compromise the lower wall of a horizontal channel with moving upper wall under the condition of partial slip, which is encountered in high temperature applications. Alumina-water nanofluid is forced through the channel. The investigated parameters are relating to the aspect of the porous surface layer (Darcy number and the porosity), Waviness of the lower wall (number of undulations), slip boundary condition, nanoparticles fraction and the <i>Re</i> number. The finite element method is used to solve the problem numerically. The results suggest that the partial slip condition slightly lowers the Nusselt number (5%) and lowers the pressure drop too. The wavy style augments <i>Nu</i> number by 37% for three undulations and lowers the pressure drop and mitigates the fluid flow irreversibility. Advantages are obtained from raising the Darcy and Reynolds numbers and the porosity of the wavy porous layer, where <i>Nu</i> rises by 28%, 33% and 23% when <i>Da</i>, <i>Re</i> and the porosity are escalated, respectively as follows: <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(10^{-4}\)</EquationSource> </InlineEquation> to 0.01, 100 to 300 and 0.2 to 0.8.</p>

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Impact of Partial Slip Condition on Forced Convection of Nanofluid in a Channel with Wavy Porous Layer

  • 期刊论文

  • 发表日期：

    2025年11月14日

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  • Ammar I. Alsabery,
  • Muneer A. Ismael,
  • Ali S. Abosinnee,
  • Inas R. Ali,
  • Ishak Hashim

摘要

This study scrutinizes the aspects of transferring the heat and the generated irreversibility from a hot wavy wall covered by a surface wavy porous layer. This combined wall represents a heat sink and compromise the lower wall of a horizontal channel with moving upper wall under the condition of partial slip, which is encountered in high temperature applications. Alumina-water nanofluid is forced through the channel. The investigated parameters are relating to the aspect of the porous surface layer (Darcy number and the porosity), Waviness of the lower wall (number of undulations), slip boundary condition, nanoparticles fraction and the Re number. The finite element method is used to solve the problem numerically. The results suggest that the partial slip condition slightly lowers the Nusselt number (5%) and lowers the pressure drop too. The wavy style augments Nu number by 37% for three undulations and lowers the pressure drop and mitigates the fluid flow irreversibility. Advantages are obtained from raising the Darcy and Reynolds numbers and the porosity of the wavy porous layer, where Nu rises by 28%, 33% and 23% when Da, Re and the porosity are escalated, respectively as follows: \(10^{-4}\) to 0.01, 100 to 300 and 0.2 to 0.8.