Abstract
This article studies , the effects of unsteady magneto-hydrodynamic boundary layer when cobalt nanoparticles where passed onto a vertical plate which is given an impulse by exponential acceleration through porous medium of ethylene glycol when thermal radiation is present ,parameters of absorption of heat and radiation, chemical reaction parameter, magnetic field in transverse direction are theoretically studied. We consider cobalt nanoparticles resembles to spherical structure and range of volume of nanoparticle concentration is basically less than or equal to 4%. Considering the boundary conditions we have formulated a governing equations of nanoparticles which is in the form of partial differential equations. The precise solutions for velocity, concentration and temperature profiles are obtained by plotting the graphs of the equations formed using Laplace Method using MATLAB software. This study of heat transfer in nanoparticles finds application in tribological aspect, biological fields dealing with molecular level cell interactions, improving thermal conductivity and commercial cooling applications. The most significant outcome of this study is found in the concentration profile where time is varied. We see that there is 68% decrease in concentration when the time interval chosen is 0.2, whereas the decrease is found to 55% when the interval is increased to 0.4 keeping the distance from vertical plate constant.
Highlights
Several industry-related processes deal with the heat transfer by way of flowing fluid either laminar or turbulent system in addition to stagnant or flowing boiling fluids
By studying all these cited articles we found out a solution for Magneto Hydrodynamic boundary layer flow for cobalt nanoparticles passed over a vertical plate through ethylene glycol which is porous medium
We have studied the effect of cobalt nanoparticles suspended in ethylene glycol chosen as the base fluid
Summary
Several industry-related processes deal with the heat transfer by way of flowing fluid either laminar or turbulent system in addition to stagnant or flowing boiling fluids. They act like fluid molecules which resolves the main problem of small passages getting clogged when larger particles are used This theoretical models has been proposed by several researchers to describe and foretell these aberrant ratios of thermal conductivity which is called as the effective thermal conductivity of Nano fluid divided by base fluid’s thermal conductivity. Kumaresan et al [5] found a precise solution for MHD convection for silver nanoparticles suspended in water as a base fluid By studying all these cited articles we found out a solution for Magneto Hydrodynamic boundary layer flow for cobalt nanoparticles passed over a vertical plate through ethylene glycol which is porous medium. The governing equation for flow of nanofluids over a vertical plate was solved by Laplace Transform method considering appropriate boundary condition and the graphs were plotted by varying the various parameters and their influence on the characteristic curves were discussed
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