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COMPUTATIONAL METHODOLOGIES FOR CONVECTION-DIFFUSION PHASE CHANGE PROBLEMS

Award Information

Agency:
National Aeronautics and Space Administration
Branch:
N/A
Award ID:
8180
Program Year/Program:
1988 / SBIR
Agency Tracking Number:
8180
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Cham Of North America Inc
1525-a Sparkman Drive Huntsville, AL 35816
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 1988
Title: COMPUTATIONAL METHODOLOGIES FOR CONVECTION-DIFFUSION PHASE CHANGE PROBLEMS
Agency: NASA
Contract: N/A
Award Amount: $50,000.00
 

Abstract:

THE OBJECTIVE OF THIS PROJECT WAS TO DEVELOP NUMERICAL METHODOLOGIES FOR ANALYZING SOLID-LIQUID PHASE CHANGE PROBLEMS INVOLVING MULTI-COMPONENT MATERIALS SUCH AS BINARY MIXTURES AND ALLOYS. THE POTENTIAL NASA INTEREST FOR THIS WORK STEMS FROM MATERIALS SCIENCE APPLICATIONS IN SPACE, E.G. CRYSTAL GROWTH. THE AIM OF PHASE I WAS TO DEFINE A FRAMEWORK FOR DEVELOPMENTOF A GENERAL PURPOSE COMPUTER PROGRAM BY EXAMINING BOTH SINGLE-AND TWO-PHASE MODELS. THE SINGLE-PHASE MODEL EQUATIONS ARE RELATIVELY EASY TO SOLVE BUT REQUIRE A PRESCRIPTION OF THE SOLID PHASE-VELOCITY AND OTHER ASSUMPTIONS FOR COMPUTING THE LOCAL MASS FRACTIONS OF THE PHASES. THE TWO-PHASE MODEL DOES NOT HAVE THESE SHORTCOMINGS BUT NEEDS DATA ON INTERFACIAL EXCHANGE COEFFICIENTS WHICH REQUIRE FURTHER RESEARCH. THE PROBLEM OF FREEZING IN A SQUARE WAS STUDIED TO ILLUSTRATE THE USE OFTHE SINGLE- AND TWO-PHASE MODELS. THE CONCLUSION DRAWN FROMTHIS WORK IS THAT A GENERAL PURPOSE CODE FOR BINARY SOLID-LIQUID PHASE CHANGE PROBLEMS MUST INCLUDE BOTH SINGLE-AND TWO-PHASE OPTIONS.

Principal Investigator:


0

Business Contact:

Small Business Information at Submission:

Cham Of North America Inc
1525-a Sparkman Drive Huntsville, AL 35816

EIN/Tax ID:
DUNS: N/A
Number of Employees: N/A
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No