Paper Key : IRJ************137
Author: Dalli Manikanta
Date Published: 10 Oct 2023
Abstract
Electro-thermo-convective phenomena can be used to actively enhance heat transfer in dielectric liquids. The lattice Boltzmann method (LBM) is a well-established tool for simulating heat and fluid flows. The study focuses on the numerical investigation of electro-thermo-convection in a system consisting of a square enclosure and a heated inner semi-circular cylinder. Electro-Thermo convective heat transfer phenomena have wide range applications like heat transfer in electronic devices, heat exchangers, micro fluids, and so on. The flow movement is driven by thermal buoyancy and an electric field generated by injecting charges from the cylinder. A unified lattice Boltzmann method is employed to solve the governing equations, including the equations for Navier-Stokes equations, energy conservation, and simplified Maxwell's equations. The physical model being studied consists of a square cavity with a semi-circular cylinder at its center. The inner semi-circular cylinder has a higher electric potential and temperature, while the outer square cavity is grounded and has a lower temperature. The electrochemical reaction at the electrode-liquid interface generates free charges that are injected into the liquid. When the electrical effect is added, it boosts heat transfer, especially when the electric driving power (represented by T) goes beyond a certain important level. When T is really high, the flow is mainly controlled by the Coulomb force, and the average Nusselt number value is also high indicating convection heat transfer takes place and properties of the fluid and the shape of the system affect this enhanced heat transfer.
DOI LINK : 10.56726/IRJMETS45138 https://www.doi.org/10.56726/IRJMETS45138