Computational investigation on transport of heat energy by flow of dusty Carreau fluid with nanoparticles using finite element method

Abstract

Thermal performance of the working fluid depends on its thermal conductivity which can be enhanced by dispersion of nanoparticles. Therfore, the role of the simultaneous suspension of AA7072 and AA7072 and AA7072/AA7075 is analyzed in Carreau fluid, which has shear rate dependent viscosity and contains dust particles. The nanoparticles AA7072 is combination of aluminium, zinc and other alloys with ratio 98%:1%:1%, respectively. Whereas nanoparticles AA7075 is the combination of aluminium, zinc, magnesium, and copper in ratio 90%:6%:3%:1%, respectively. Further, the nanoparticle AA7072 in Carreau liquid form homogenized mixture which is mono nanofluid whereas nanoparticle AA7075 in Carreau liquid form homogenized mixture called hybrid nanofluid. Thermal radiation have significant impact on the temperature of AA7072 and AA7072/AA7075. The Carreau-constitutive model and correlations for thermo-physical properties are used with conservation laws for fluid and dust phases for modelling purposes. The governing equations are non-dimensionalized, and their numerical solutions are derived using the finite element method (FEM). These derived solutions are used to predict the behavior of physical quantities and flow fields for both AA7072/AA7075 and AA7072 nanoparticles. An increasing tendency in the temperature of dust particles in AA7072/AA7075 is greater than in AA7072. The simulations have exposed that AA7072/AA7075 is more radiative than AA7072. The velocity interaction parameter has an increasing tendency in affecting the transport of dust particles.

Keywords

• Base fluid
• Dusty hybrid nano-particles, finite element method
• Thermal energy performance
• Thermal radiations