SIMPLIFIED METHODS FOR CALCULATING FROST PENETRATION /IN NORWEGIAN/

THE PRINCIPLES OF SOME COMMON SIMPLE METHODS FOR CALCULATING FROST DEPTHS ARE OUTLINED, AND THEIR RESULTS ARE COMPARED TO A NUMERICAL SOLUTION OBTAINED WITH THE HEAD-FLOW EQUATION. ATTENTION IS DRAWN TO THREE IMPORTANT FEATURES OF SUCH METHODS: (1) THE ASSUMPTION THAT LATENT HEAT IS FREED OR BOUND AT A FIXED TEMPERATURE; (2) THE FREEZING INDEX CONCEPT; AND (3) THE INCORPORATION OF HEAT SUPPLY TO THE FREEZING LINE FROM BELOW. THE AUTHOR CONCLUDES THAT THE VALUE OF THE METHODS IS LIMITED BY THE FACT THAT WATER IN MANY SOILS DOES NOT FREEZE OR MELT AT A FIXED TEMPERATURE, BUT OVER A TEMPERATURE RANGE. THE FREEZING INDEX OR THE USUAL WAYS OF INCORPORATING HEAT SUPPLY TO THE FREEZING LINE FROM BELOW DOES NOT ALWAYS GIVE SUFFICIENT INFORMATION ON THE CONDITIONS AT THE RESPECTIVE BOUNDARIES. THE INTERACTION OF THE BOUNDARY CONDITIONS, WHICH IS OFTEN OVERLOOKED, MAY BE IMPORTANT, PARTICULARLY WHERE HEAT IS SUPPLIED ARTIFICIALLY AS IN SOILS NEAR HOUSES. /SVV/TRRL/

  • Corporate Authors:

    Royal Norwegian Council Sci & Ind Res

    ,    

    Public Roads Administration, Norway

    Schwensengate 3
    Oslo 1,   Norway 
  • Authors:
    • Klove, K
  • Publication Date: 1971-2

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00237674
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: TRIS
  • Created Date: Jun 11 1972 12:00AM