Accession Number : AD0738911

Title :   Natural Convection Heat Transfer from a Horizontal Disk in a Cylindrical Enclosure.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF

Personal Author(s) : Duncan,Duane Stewart , Jr

Report Date : DEC 1971

Pagination or Media Count : 57

Abstract : In the report the author discusses natural convection in water from a horizontal mirror finished disk, heated in the center and surrounded by a cylindrical enclosure. The test section was designed to insure a one dimensional heat flux. Measurements were taken with power inputs varying from 25 to 5 watts. Fluid depth had a definite effect on the heat transfer. An apparent maximum value existed at a ratio of enclosure radius to fluid depth of one. Comparison of the data with existing correlations however, was poor which led to the questioning of the validity of the assummed one dimensional heat flux. Use of a finite element computer program demonstrated that two dimensional effects were important. Subsequent modification of the heat transfer coefficient to account for this variation gave a correlation more in agreement with those existing in the literature. (Author)

Descriptors :   (*CONVECTION(HEAT TRANSFER), WATER), HEAT FLUX, FLUID FLOW, THERMAL CONDUCTIVITY, PRANDTL NUMBER, THERMOCOUPLES, NUMERICAL ANALYSIS, COMPUTER PROGRAMMING, CURVE FITTING, CYLINDRICAL BODIES, BOILING, THESES

Subject Categories : Fluid Mechanics
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE