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Mechanisms of Heat Transfer II

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Updated: May 21, 2026

Pool-Boiling Heat-Transfer Enhancement on Cylindrical Surfaces with Hybrid Wettable Patterns

Pool-Boiling Heat-Transfer Enhancement on Cylindrical Surfaces with Hybrid Wettable Patterns

Published on: April 10, 2017

Heat radiation from long cylindrical objects.

Vladyslav A Golyk¹, Matthias Krüger, Mehran Kardar

¹Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics

|June 12, 2012

Summary

This summary is machine-generated.

Thermal radiation deviates from classical laws for small objects. Polarization of cylinder radiation depends on size relative to thermal wavelength, with distinct behaviors for carbon nanotubes.

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Area of Science:

Physics
Nanotechnology
Materials Science

Background:

Classical blackbody radiation (Planck and Stefan-Boltzmann laws) applies to large objects.
Small objects exhibit unique thermal radiation properties due to their size relative to thermal wavelengths.
Understanding nanoscale thermal emission is crucial for advanced material applications.

Purpose of the Study:

To investigate thermal radiation from objects comparable to or smaller than the thermal wavelength.
To explore the influence of size, shape, and material properties on thermal emission.
To analyze the polarization of radiation emitted by a uniform temperature cylinder.

Main Methods:

Utilizing methods based on scattering of electromagnetic waves.
Modeling thermal radiation from a long cylinder at uniform temperature.
Analyzing the degree of polarization of emitted radiation.

Main Results:

Radiation polarization is dependent on the cylinder's radius relative to the thermal wavelength.
For radii much smaller than the thermal wavelength, radiation is polarized parallel to the axis.
For radii comparable to the thermal wavelength, polarization shifts to be perpendicular.
Uniaxiality in materials (like carbon nanotubes) significantly impacts polarization for radii > few micrometers, but minimally for submicrometer sizes.

Conclusions:

Classical blackbody radiation laws are insufficient for nanoscale objects.
Cylinder geometry and material properties critically influence thermal radiation polarization.
The findings have implications for designing materials with tailored thermal emission properties, particularly for carbon nanotubes.