Numerical Study of Boiling Flow of Aluminum Oxide

With the advancement of the industry, heat rejection loads have significantly increased. Proper thermal management is essential to enhance the performance and longevity of these systems. Therefore, investigating effective methods to improve heat transfer is of great importance. One such method is subcooled boiling flow. The present study focuses on optimizing key parameters for heat transfer enhancement by suspending nanoparticles in the base fluid. To simulate the flow field, the averaged Navier-Stokes equations were employed in the Eulerian approach for each phase, along with appropriate correlations to describe the boiling process. The influence of nanoparticles was incorporated through their averaged thermophysical properties in the flow field and boiling equations. The results indicated that adding alumina nanoparticles to the base fluid significantly increased the heat transfer coefficient, particularly in boiling heat transfer. Furthermore, at higher nanoparticle concentrations, the wall temperature decreased, and the convective heat transfer coefficient improved considerably.

کلیدواژه ها:

Sub-cold-welded ، nanoparticles ، geometrical concentration ، convective heat transfer coefficient