THERMAL DIFFUSIVITY MEASUREMENTS ON A FINITE DISK

Technical Report · Fri Jun 01 04:00:00 EDT 1962

OSTI ID:4778736

Maycock, P D; Danielson, G C

A new technique has been developed for measuring the thermal diffusivity of finite disk-shaped samples. The radial heat flow equation was solved by the method of finite differences. An axial heater was turned on and the temperatures at three radial positions were measured as functions of time. This procedure determined the boundary conditions necessary for the solution of the heat flow equation. By assuming various values of the thermal diffusivity, we obtained the solution at the middle thermocouple. The value that gave the best agreement between the compilted solution at the middle thermocouple and the experimental curve obtained at the midpoint was considered to be the best value for the diffusivity. A FORTRAN program which calculates the diffusivity from the experimental data was developed, and an IBM 704 computer was used to process the data. Data on Armco iron show that the method is capable of giving correct values for thermal diffusivity. (auth)

• Research Organization: Ames Lab., Ames, Iowa
• DOE Contract Number: W-7405-ENG-82
• NSA Number: NSA-17-003106
• OSTI ID: 4778736
• Report Number(s): IS-492
• Country of Publication: United States
• Language: English

Related Subjects

ARMCO IRON
COMPUTERS
DIAGRAMS
ENGINEERING AND EQUIPMENT
EQUATIONS
FORTRAN
HEAT TRANSFER
HEATING
IBM 704
IRON
MEASURED VALUES
PERFORMANCE
PLATES
PROGRAMMING
QUANTITATIVE ANALYSIS
STANDARDS
TEMPERATURE
THERMAL DIFFUSION
THERMOCOUPLES
THERMODYNAMICS