THIS PROJECT EXPLORES A MATHEMATICAL MODEL OF A MICROGRAVITYPROCESS INVOLVING MIXED CONVECTION HEAT TRANSFER, NAMELY, THE TIME DEPENDENT FLOW OF FLUID PAST A SPHERE SUBJECT TO A THERMAL GRADIENT.

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$50,000.00
Award Year:
1983
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Award Id:
666
Agency Tracking Number:
666
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
11631 Idlebrook, Houston, TX, 77070
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
DR. MARK J. HOMMEL
PRINCIPAL INVESTIGATOR
() -
Business Contact:
() -
Research Institution:
n/a
Abstract
THIS PROJECT EXPLORES A MATHEMATICAL MODEL OF A MICROGRAVITYPROCESS INVOLVING MIXED CONVECTION HEAT TRANSFER, NAMELY, THE TIME DEPENDENT FLOW OF FLUID PAST A SPHERE SUBJECT TO A THERMAL GRADIENT. RESULTS OF THIS STUDY PROVIDE INSIGHT INTO THE BASIC FLUID MECHANICS INVOLVED IN SUCH PROCESSES AND ESTABLISH A FOUNDATION FOR EXTENDING THE ANALYSIS TO INCLUDE MASS TRANSFER BY DIFFUSION AND THE ASSOCIATED BUOYANCY EFFECTS. THE FLUID MECHANICS OF HEAT AND MASS TRANSFER PROCESSES IN GRAVITY ARE EXPLORED BY CONSIDERING THE FUNDAMENTAL PROBLEM OF THE IMPULSIVELY STARTED UNIFORM FLOW PAST A HEATED SPHERE. BOTH THE AIDING AND OPPOSING CASES, WHEREIN BUOYANCY FORCES ARE PARALLEL AND ANTI- PARALLEL, RESPECTIVELY, TO THE MEAN FLOW ARE CONSIDERED BY MEANS OF THE TECHNIQUES OF MATCHED ASYMPTOTIC EXPANSIONS. FORMULAS AND GRAPHS ARE PREPARED DESCRIBING THE SHEAR STRESSAND HEAT TRANSFER FROM THE SPHERE FOR A WIDE RANGE OF THE GOVERNING PARAMETERS.

* information listed above is at the time of submission.

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