This paper provides a basic information to control snow layers on roads or runways in order to maintain road safety. The snow saturated with a calcium chloride aqueous solution is initially in the thermodynamic equilibrium at the desired concentration and temperature. Since the snow layer bottom is quickly cooled by maintaining a fixed cooling wall temperature, the aqueous solution in the snow layer will freeze gradually upwards without natural convection in the layer due to the stable density distribution. It is seen that the temperature/concentration and the freezing volume fraction are affected by the cooling wall temperature and the initial concentration in the layer. A simple idealized numerical model predicts well the freezing behavior of the snow layer saturated with the aqueous solution.


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    Title :

    Freezing of snow layers saturated with a calcium chloride aqueous solution


    Contributors:
    Sugawara, M. (author) / Tago, M. (author) / Nozawa, R. (author) / Beer, H. (author)

    Published in:

    Heat and Mass Transfer ; 39 , 5-6 ; 463-469


    Publication date :

    2003


    Size :

    7 Seiten, 11 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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