Measuring the Thermal Properties of Cylindrical Specimens by the Use of Sinusoidal Temperature Waves.

An apparatus for measuring the thermal diffusivity of cylindrical specimens of soil and rock was constructed and tested. The amplitude of the temperature wave used was about 1C and the frequency of the wave was two cycles per hour. Because the direction of the temperature gradient is constantly reve...

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Bibliographic Details
Main Authors: Hoekstra,P., Delaney,A., Atkins,R.
Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H
Format: Text
Language:English
Published: 1973
Subjects:
Soil Mechanics
Snow
Ice and Permafrost
*Thermal properties
*Soils
*Rock
*Measuring instruments
Diffusivity
Permafrost
Thermal conductivity
Costs
Sand
Clay
Freezing
Frozen soils
Ice
permafrost
Online Access:http://www.dtic.mil/docs/citations/AD0770425
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0770425
Description
Summary:An apparatus for measuring the thermal diffusivity of cylindrical specimens of soil and rock was constructed and tested. The amplitude of the temperature wave used was about 1C and the frequency of the wave was two cycles per hour. Because the direction of the temperature gradient is constantly reversed, the method has advantages for specimens where water migration is a problem. Also, because of the small temperature differentials that can be used the method is suited for materials for which the thermal properties are temperature dependent, such as, for example, frozen ground in the temperature range from zero C to minus ten C.

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