Toward Bio-Inspired Smart Thermal Spreaders (BSTS)
Technical Report,01 May 2016,30 Jul 2019
University of Houston Houston United States
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In this research program, we aimed to understand fundamentals of liquid- vapor phase change at small-scale and to develop a bio-inspired thermal spreader. In the first budget period, we developed a new concept and corresponding material structure that breaks the limit of phase-change heat transfer Leidenfrost limit. The developed concept, decoupled hierarchical structures, is implemented in both Si and Cu structures. In the second budget period, we studied fundamentals of liquid-vapor phase change in a controlled evaporation chamber to tune and measure interfacial mass and heat transfer at an evaporating interface. We formed a predictive model based on the non-equilibrium thermodynamics that can predict mass and energy flux independently. In contrast with the current gas kinetics models, the developed model satisfies both momentum and energy conservations.
- Physical Chemistry