Accession Number:

AD0649292

Title:

KINETIC THEORY OF RADIOMETRIC PHOTOPHORESIS IN A KNUDSEN GAS,

Descriptive Note:

Corporate Author:

ILLINOIS UNIV URBANA COORDINATED SCIENCE LAB

Personal Author(s):

• Wu,Yau

Report Date:

1967-03-01

Pagination or Media Count:

22.0

Abstract:

The kinetic theory of a small particle with arbitrary temperature distribution on its surface suspended in a Knudsen gas enclosed by an unequally heated boundary was established according to the revised law of thermal transpiration developed recently by Wu. The external force acting on the particle is mainly due to the radiometric force caused by the incident and the reflecting molecules in the absence of thermal creep effect in this limiting regime. Several particle shapes were considered, such as a small disk, flat plate, sphere and cube presented in a cylinder with uniform temperature gradient in a thermal transpiration system. Author

Descriptors:

• (*PARTICLES
• KINETIC THEORY)
• (*RAREFIED GAS DYNAMICS
• OPTICAL PHENOMENA)
• LIGHT
• ENERGY
• RADIOMETERS
• KNUDSEN NUMBER
• TEMPERATURE
• DISTRIBUTION
• THERMAL PROPERTIES
• GASES

Subject Categories:

• Fluid Mechanics
• Optics
• Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE