Control temperature fluctuations in two-phase CuO-water nanofluid by transfiguration of the enclosures

Abstract

The innovation of this paper is to simulate two-phase nanofluid natural convection inside the transformable enclosure to control the heat transfer rate under different heat flux. Heat transfer of a two-phase CuO-water nanofluid in an enclosure under different heat flux has many industrial applications including energy storage systems, thermal control of electronic devices and cooling of radioactive waste containers. The Lattice Boltzmann Method based on the D2Q9 method has been utilized for modeling velocity and temperature fields. Streamlines, isotherms and nanoparticle volume fraction, have been investigated for control the heat transfer rate for several cases. The purpose of this feasibility study is to achieve uniform temperature profiles and Tmax < 50?C under different heat flux. Natural convection heat transfer in the rectangular and parallelogram enclosures with positive and negative angular adiabatic walls were simulated. The average wall temperature under heat flux boundary condition has been studied to predict optimal levels of effective factors to control the maximum wall temperature. The results illustrated parallelogram enclosures with positive angle of case 1 and case 3 and 4 with rectangular enclosures were best cases for considering physical conditions. Average of temperature for these cases were 37.9, 29.7 and 38.2, respectively.

Impinging hollow droplet of glycerin in spray coating influence of mutable obstacle and dynamic contact angle

“…An experimental study of the dynamic behavior of a droplet impingement with a flat surface was performed (Alinejad and Abolfazli Esfahani 2014). In numerical modeling, the researchers thermal sprayed a droplet on the flat surface at different speeds (Araban Pourziaei et al 2021). Scientists measured and analyzed the distribution of dens and hollow droplets by numerical solution (Rein 1993).…”

Surveying the effects of concave obstacles with different edge walls on hollow glycerin droplet impacting using the volume of fluid approach

“…Experiments and analytical models have been used to study the dynamics of a single droplet impingement. 1 Researchers have done some studies on droplet contact and adhesion on a solid surface. 2 The influence of a droplet adhesion on a flat surface was studied experimentally by scientists to investigate the fluid jet that occurs at the surface.…”