윤애정 교수

In various industrial applications, the main objective is to enhance thermal efficiency by minimizing the generation of entropy. Specifically, achieving optimal thermal efficiency in a tilted cylindrical chamber poses significant challenges due to the combined effects of tangential and normal gravity components. Our study focuses on the flow dynamics, thermal transport, and entropy generation of Fe3O4/H2O nanoliquid within a cylindrical annular enclosure by incorporating the synergistic effects

Purpose Natural convection in finite enclosures is a common phenomenon in various thermal applications. To provide the thermal design guidelines, this study aims to numerically explore the potential of using internal baffles and nanofluids to either enhance or suppress heat transport in a vertical annulus. Furthermore, the annular-shaped enclosure is filled with aqueous-silver nanofluid and the effects of five distinct nanoparticle shapes are examined. In addition, the influence of baffle design

Paper presented to the 10th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Florida, 14-16 July 2014.

In this study, experimental and theoretical investigations are performed to reveal a relationship between heat transfer and flow behavior of plugs/slugs in a micro pulsating heat pipe (MPHP). A silicon-based MPHP with 5 turns and a hydraulic diameter of 667 ??m is fabricated using MEMS techniques. Experiments are performed at various levels of heat input with a bottom-heating mode and ethanol is used as a working fluid at a fixed filing ratio of 55%. Flow visualization is conducted together with