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Heat and mass transfer across interfaces in complex nanogeometries
Øivind Wilhelmsen1, Thuat T Trinh1, Signe Kjelstrup1
1Department of Chemistry, Norwegian University of Science and Technology, N-7491 Trondheim, Norway.
Physical Review Letters
|February 28, 2015
Summary
Curvature significantly impacts heat and mass transfer in nanodevices. A new method accurately predicts transfer coefficients for complex nanogeometries, aiding nanodevice design.
Area of Science:
- Thermodynamics
- Nanoscale Science
- Computational Physics
Background:
- Heat and mass transfer in nanodevices are heavily influenced by geometry and interfacial properties like Kapitza resistance.
- Understanding these effects is crucial for designing efficient nanodevices.
Purpose of the Study:
- To develop a method for calculating interface transfer coefficients in complex nanogeometries.
- To investigate the impact of curvature on heat and mass transfer.
Main Methods:
- Combined nonequilibrium square gradient theory and nonequilibrium molecular dynamics simulations.
- Developed a curvature expansion for interface transfer coefficients.
Main Results:
- Obtained coefficients for curvature expansion applicable to complex nanogeometries.
- Analyzed heat and mass transfer in oblate spheroidal droplets, prolate spheroidal bubbles, and toroidal bubbles.
- Demonstrated that curvature significantly enhances or reduces transfer depending on its sign and magnitude.
Conclusions:
- The presented method accurately describes heat and mass transfer in complex nanogeometries.
- The findings are applicable to various interfaces and substances.
- This work is expected to advance the understanding and design of nanodevices.
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