Accession Number:

AD0744338

Title:

Nonequilibrium Crystallization of Carbon Dioxide in a Ducted Axisymmetric Jet.

Descriptive Note:

Technical progress rept.,

Corporate Author:

MEDICAL COLL OF SOUTH CAROLINA CHARLESTON

Personal Author(s):

• Pearce,John Anthony

Report Date:

1971-12-01

Pagination or Media Count:

88.0

Abstract:

Solid particles of CO2 can be made in a two-stage expansion directly from bottled gas. The first stage of the expansion, a ducted-axisymmetric jet, was chosen as the subject of the report. The first stage was modeled by the appropriate theories of nucleation, growth, gas dynamics, and flow-field conditions. The solution of the theories was accomplished by means of a digital simulation of the flow field. Experimental results prove that the theoretical results are incorrect. Experimental results show that the first stage produces a mass fraction of less than 1 percent, a significant deviation from isentropic prediction of about 15 percent. A totally empirical approach to the jet is recommended. The research was conducted in connection with abrasive removal of burnt ittue eschar.

Descriptors:

• *CARBON DIOXIDE
• *BURNS(INJURIES)
• SURGERY
• NUCLEATION
• CRYSTAL GROWTH
• PARTICLE SIZE
• EQUATIONS OF STATE
• MATHEMATICAL ANALYSIS
• COMPUTER PROGRAMS
• FREEZING
• LIGHT TRANSMISSION
• THERAPY

Subject Categories:

• Medicine and Medical Research
• Physical Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE