An experimental method for determining the thermal accommodation coefficient of an inert gas in contact with an amorphous surface
Determinations of the thermal accommodation coefficient were made for helium and argon interacting with an amorphous glass surface. These determinations were made using a thermistor, specified as being coated with a Corning Type 0120 glass, as a test surface. An all-metal stainless steel vacuum system employing ionization pumping was used. A model was synthesized from existing continuum accommodation theory to predict the thermal accommodation coefficient of inert gases interacting with amorphous surfaces. The experimental value of 0.2 for helium interacting with Corning Type 0120 glass was found to be consistent with four accommodation coefficient theories which collectively yielded an accommodation coefficient value of 0.184. The experimental value of 0.65 for argon interacting with Corning Type 0120 glass was not consistent with the theoretical value of 0.902.
- Pub Date:
- November 1977
- Amorphous Materials;
- Rare Gases;
- Stainless Steels;
- Fluid Mechanics and Heat Transfer