The Importance of Nanoparticles Addition in a Base Fluid Flow through a Porous Medium

Dalia Sabina Cimpean

doi:10.4028/www.scientific.net/aef.8-9.225

Dalia Sabina Cimpean

Open Access

https://doi.org/10.4028/www.scientific.net/aef.8-9.225

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Abstract

The present study is focused on the mixed convection fluid flow through a porous medium, when a different amount of nanoparticles is added in the base fluid. The nanofluid saturates the porous matrix and different situations of the flow between two walls are presented and discussed. Alternatively mathematical models are presented and discussed. A solution of a system which contains the momentum, Darcy and energy equations, together with the boundary conditions involved, is given. The behavior of different nanofluids, such thatAu-water, Ag-waterandFe-wateris graphically illustrated and compared with the previous results.The research target is to observe the substantial increase of the thermophysical fluid properties, when the porous medium issaturated by a nanofluid instead of a classical Newtonian fluid.

Highlights

Because the conventional heat transfer fluids including oil, water and ethylene glycol mixture, are poor heat transfer fluids, an important and innovative technique, for improving heat transfer, was considered in the last years
Consider the mixed convection flow of a nanofluid in an inclined infinitely long two-dimensional channel bounded by parallel plane walls and filed with a fluid-saturated porous medium
First model By following the considerations from the above paragraph, we consider the fully developed mixed convection flow of a nanofluid between two parallel plates filled by a porous medium and write the governing equations of a nanofluid corresponding to the given problem, as:

Summary

Introduction

Because the conventional heat transfer fluids including oil, water and ethylene glycol mixture, are poor heat transfer fluids, an important and innovative technique, for improving heat transfer, was considered in the last years. Several studies on fluid flows through porous media were recently reported ([2, 3, 4]), many other are related to nanofluids ([5, 6, 7]). Consider the mixed convection flow of a nanofluid in an inclined infinitely long two-dimensional channel bounded by parallel plane walls and filed with a fluid-saturated porous medium.

Results

Conclusion