Accession Number : ADA189627

Title :   Thermal Instability and Heat Transfer Characteristics in Water/Ice Systems,

Corporate Author : COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH

Personal Author(s) : Yen, Yin-Chao

PDF Url : ADA189627

Report Date : Nov 1987

Pagination or Media Count : 51

Abstract : This review discusses problems associated with the anomalous temperature-density relations of water. It covers a) onset of convection, b) temperature structure and natural convective heat transfer, and c) laminar forced convective heat transfer in the water/ice system. The onset of convection in a water/ice system was found to dependent on thermal boundary conditions, not a constant value as in the classical fluids that have a monotonic temperature-density relationship. The water/ice system also exhibits a unique temperature distribution in the melt layer immediately after the critical Rayleigh number is exceeded and soon after it establishes a more or less constant temperature region progressively deepening as the melt layer grows. The constant temperature is approximately 3.2 C for water layers formed from above but varies for melt layers from below. The heat flux across the water/ice interface was found to be a weak power function and to increase linearly with temperature for melted layers from above and below, respectively. Keywords: Density inversion, Heat transfer, Ice, Natural convection, Thermal instability, Water.

Descriptors :   *HEAT TRANSFER, *ICE, *THERMAL INSTABILITY, *WATER, BOUNDARIES, CONVECTION(HEAT TRANSFER), DENSITY, DISTRIBUTION, FLUIDS, HEAT FLUX, INTERFACES, INVERSION, LAYERS, LOW STRENGTH, MELTS, POWER, TEMPERATURE, THERMAL BOUNDARY LAYER, WATER SUPPLIES

Subject Categories : Physical and Dynamic Oceanography
      Snow, Ice and Permafrost
      Thermodynamics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE