Thermophoresis of Axially Symmetric Bodies

Abstract

Thermophoresis of axially symmetric bodies is investigated to first order in the Knudsen-number, Kn. The study is made in the limit where the typical length of the immersed body is small compared to the mean free path. It is shown that in this case, in contrast to what is the case for spherical bodies, the arising thermal force on the body is not in general antiparallel to the temperature gradient. It is also shown that the gas excerts a torque on the body, which in magnitude and direction depends on the body geometry. Equations of motion describing the body movement are derived. Asymptotic solutions are studied.

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Document Details

Document Type
Technical Report
Publication Date
Jul 09, 2000
Accession Number
ADA409074

Entities

People

  • Karl I. Borg
  • Lars H. Soederholm

Organizations

  • Royal Institute of Technology

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Angular Momentum
  • Boltzmann Equation
  • Coefficients
  • Distribution Functions
  • Dynamics
  • Eigenvalues
  • Equations
  • Equations Of Motion
  • Gas Dynamics
  • Gases
  • Integrals
  • Kinetic Theory
  • Mean Free Path
  • Momentum
  • Momentum Transfer
  • Rarefied Gas Dynamics
  • Temperature Gradients

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.