Accession Number : AD0717027

Title :   The Measurement of Heat Flow in the Ground and the Theory of Heat Flux Meters

Descriptive Note : Technical rept.

Corporate Author : COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH

Personal Author(s) : Schwerdtfeger, Peter

PDF Url : AD0717027

Report Date : Nov 1970

Pagination or Media Count : 37

Abstract : The behavior of heat flux meters has been examined by experimental, electrical analogue and numerical means. The results indicate the more general applicability of the flux meter equation first proposed by Philip (1961) for the special case of spheroidal meters, provided certain precautions are taken. The purely geometric parameter appearing in this equation has been related to meter shape and a functional connection has been suggested. It is proposed that pairs of thermal sensors be used to monitor thermal conductivity continuously and the use of nonuniform 'focusing' heat flux meters is recommended in cases where the physical cross section of a thermopile should remain small compared to the resultant thermal cross section. Finally a number of calibration techniques are reported, including the use of a novel radiation enclosure in which meters are temporarily tested as net radiometers,

Descriptors :   *HEAT TRANSFER, *MICROMETEOROLOGY, *SOILS, CALIBRATION, DETECTORS, HEAT FLUX, MEASUREMENT, MEASURING INSTRUMENTS, NUMERICAL ANALYSIS, PERFORMANCE(ENGINEERING), RADIOMETERS, THERMAL CONDUCTIVITY, THERMOCOUPLES

Subject Categories : Meteorology
      Test Facilities, Equipment and Methods
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE