TRANSPORT PROPERTIES IN NON-EQUILIBRIUM AIR MIXTURES

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$49,766.00
Award Year:
1990
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Award Id:
11999
Agency Tracking Number:
11999
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
P.o. Box 30133, Eugene, OR, 97403
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
C. Frederick Hansen
Principal Investigator
(503) 344-4007
Business Contact:
C. FREDERICK HANSEN
PRESIDENT
(503) 344-4007
Research Institute:
n/a
Abstract
THE PROPOSAL IS (1) TO DETERMINE HOW CLOSELY SIMPLE, WEIGHTED CROSS SECTIONS CAN MATCH THE COLLISION INTEGRALS OF THE CHAPMAN-COWLING FORMULATION, AS A FUNCTION OF TEMPERATURE; (2) TO DEMONSTRATE THAT SIMPLE FORMULAE FOR VISCOSITY, THERMAL CONDUCTIVITY, AND MASS DIFFUSION OF GAS MIXTURES APPROXIMATE THE FUNCTIONAL FORM OF MORE EXACT MODELS; AND (3) TO FIND EMPIRICAL ADJUSTMENTS OF THE CROSS SECTIONS AND/OR CONSTANT COEFFICIENTS IN THE MIXTURE FORMULAE WHICH WILL NOT ONLY RETAIN THE PROPER FUNCTIONAL FORM BUT WILL ALSO QUANTITATIVELY REPRODUCE MORE EXACT MODELS. THE OBJECTIVE IS TO PROVIDE A FAST EFFICIENT ALGORITHM WHICHCAN BE USED IN COMPUTATIONAL FLUID DYNAMICS PROGRAMS WITH THE MOST SPEED POSSIBLE SO THAT THESE PROGRAMS CAN FIND SOLUTIONS TO COMPLEX, NON-EQUILIBRIUM AIRFLOW CONDITIONS IN REASONABLE COMPUTATION TIMES. THE METHODS DEVELOPED WILL ALSO PROVIDE A BASIS FOR QUICK CALCULATION OF TRANSPORT PROPERTIES OF GAS MIXTURES OTHER THAN AIR.

* information listed above is at the time of submission.

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