Evolution of Designs for Constructal Cooling of a Square Plate Using Water, Ionic Liquid, and Nano-Enhanced Ionic Liquids

Abstract

Abstract In this paper, we investigate the design-evolution of an embedded pipe based on the constructal theory to obtain the best design that cools a square plate subjected to a constant heat flux boundary condition. The water, ionic liquids (ILs), and nano-enhanced ionic liquids (NEILs, i.e., [C4mim][NTf2] + Al2O3 and [C4mpyrr][NTf2] + Al2O3) have been used as the coolants. Several designs (Case 1 to Case 11) have been tested to quantify the non-dimensional temperature of the heated substrate by implementing the finite volume method of ansys fluent. The three-dimensional continuity, momentum, and energy equations have been solved iteratively in the fluid region by incorporating SIMPLE algorithm with appropriate boundary conditions; while the conduction equation is solved in the solid region. Among all the considered designs, it has been found that Case 3 provides a better cooling effect for the heated substrate. For all of the considered configurations/designs, it is also found that the non-dimensional temperature decreases with the length of the morphing pipe. NEILs exhibit a better cooling effect of the substrate when compared with the ILs and water. The present numerical methodology is also validated with the previous literature.