A NODAL DOMAIN INTEGRATION MODEL OF TWO-DIMENSIONAL HEAT AND SOIL-WATER FLOW COUPLED BY SOIL-WATER PHASE CHANGE

A model of phase change in freezing and thawing soils is developed for cold regions engineering problems which require two-dimensional analysis of the thermal regime of soils. These problems include complex boundary conditions such as atmosphere/ground surface thermal interaction and snowpack insulation. Other concerns include complex soil conditions such as the presence of a peaty muskeg or tundra-like soil which may provide thermal insulation for underlying ice-rich mineral soil. Although several models have been developed to predict temperatures in freezing and thawing soils, often the key question is simply whether or not the soil is frozen, since soil structural properties are significantly influenced by the soil-water state of phase. In this report, a simple two-dimensional model is developed for use in cold regions engineering studies. A FORTRAN computer program is available which accommodates two-dimensional heat and soil-water flow models as coupled by an isothermal phase change model. The program can be used to analyze two-dimensional freezing-thawing problems which have sufficient known information to supply the necessary modeling parameters, boundary conditions, and initial conditions. Because of the sophistication of the two-dimensional phase change model and the data requirements needed to properly represent inhomogeneity of the system, boundary conditions, and other complexities, a special data input program is developed in order to aid the model user. This general purpose data preparation program, PROTO0, develops the data input file to be used directly by the two-dimensional phase change program.

• Corporate Authors:

  U.S. Army Cold Regions Research and Engineering Laboratory

  72 Lyme Road
  Hanover, NH  United States  03755-1290
• Authors:
  • Hromadka, T
• Publication Date: 1987-6

Media Info

• Features: Figures; References; Tables;
• Pagination: 129 p.

Subject/Index Terms

• TRT Terms: Building heating; Flow; Fluxes; Freeze thaw durability; Heat flux; Heat insulating materials; Simulation; Soil water; Streamflow; Water
• Uncontrolled Terms: Muskeg
• Old TRIS Terms: Freezing thawing effects
• Subject Areas: Geotechnology; Highways; Hydraulics and Hydrology; I42: Soil Mechanics;

Filing Info

• Accession Number: 00473052
• Record Type: Publication
• Report/Paper Numbers: CRREL-SR-87-9
• Files: TRIS
• Created Date: Sep 30 1987 12:00AM