HEAT CAPACITY LAG IN HEAVY GASES.
Abstract
Purpose: To examine and interpret the dispersion of sound in heavy vapors. Summary: The general objective under this and several preceding contracts has been the study and interpretation of sound dispersion in heavy gases. In particular, the objective under the present contract is to determine the effect of electric field on the vibrational relaxation times of some heavy polar gases. One might expect that an electric field would partially align polar molecules so that their orientation upon collision would not be completely random as before. Hence, a small change in the relaxation time might be expected. The polar gases, CH2F2, CHF3 and C2H4 which have a high, medium and zero dipole moment respectively were used in the study. They also have dispersion regions which are easily accessible. Argon, which has no dipole moment and no dispersion, was examined to insure that the electric field produced no other effect on the velocity than that due to molecular alignment. The gases were examined in various field strengths with the maximum field being 9000 volts per centimeter. No measurable effect on the velocity was found for any of the gases examined. Hence, one can conclude that an electric field of this strength has no appreciable effect on the relaxation times of heavy polar gases. (Document quoted in its entirety).
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1961
- Accession Number
- AD0611364
Entities
People
- John R. Olson
- Sam Legvold
Organizations
- Iowa State University