Numerical Investigation of the Effects of Velocity and Particle Concentration on Heat Transfer of Vibrational Flow of Non-Newtonian Nanofluid

Volume 8 Issue 1 January - March 2019

Research Paper

Numerical Investigation of the Effects of Velocity and Particle Concentration on Heat Transfer of Vibrational Flow of Non-Newtonian Nanofluid

Santosh K. R. Mishra*, H. Chandra**, Arun Arora***

*_***Bhilai Institute of Technology, Durg, Chhattisgarh, India.

Mishra, S. Kr., Chandra, H., Arora, A. (2019). Numerical investigation of the effects of velocity and particle concentration on heat transfer of Vibrational flow of non-Newtonian nanofluid. i-manager's Journal on Mathematics, 8(1), 35-47https://doi.org/10.26634/jmat.8.1.16239

Abstract

In this paper, the effect of solid particle concentration and flow velocity of nanofluid with and without superimposed vibration at the wall were numerically investigated. For this purpose, non-newtonian nanofluid containing Al2O3 and aqueous CMC solution as a single phase with an average particle size of 25 nm and four particle concentration of 0.0, 0.5, 1.0, and 1.5% were used. Effects of volume concentration on convective heat transfer coefficient were investigated in different Reynolds number for different vibration parameters. The results showed that in a steady flow, with Reynolds number, dispersion of nanoparticles causes the thermal boundary layer to grow rapidly than that of base fluid in axial direction and vibration act as a catalyst; at a given concentration much enhancement results than steady state. The ratio of convective heat transfer coefficient of unsteady state to a steady state flow of nanofluid with an increase of Reynolds number and increases with concentration. Vibration effects reduce in significance as frequency increases, and that they are more sensitive to amplitude to frequency. The largest increase of about 300% was observed under the condition of vibrational flow of nanofluid compared with a steady flow of base fluid.