Toward Bio-Inspired Smart Thermal Spreaders (BSTS)

Abstract

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.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 2019
Accession Number
AD1096716

Entities

People

  • Hadi Ghasemi

Organizations

  • University of Houston

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Boundary Layer
  • Fluid Dynamics
  • Fluid Flow
  • Geometry
  • Heat Energy
  • Heat Transfer
  • Heat Transfer Coefficients
  • Latent Heat
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Measurement
  • Microscopes
  • Steady State
  • Thermal Conductivity
  • Thermodynamic Properties
  • Thermodynamics

Readers

  • Combustion and Flow Dynamics.
  • Distributed Systems and Data Platform Development
  • Thermal Physics or Thermal Science.