Item: Drift-flux modelling and numerical simulation of snow-accumulation
Title: Drift-flux modelling and numerical simulation of snow-accumulation
Proceedings: Proceedings of the 1996 International Snow Science Workshop, Banff, Canada
Authors: Per-Arne Sundsbo, Narvik Institute of Technology, Dep. of Building Science, Narvik, Norway, Telephone: (+47) 76 9221 94, Fax: (+47) 76 944866, e-mail: Per.Arne.Sundsbo@hin.no
Abstract: This paper presents a method for two-dimensional numerical simulations of snow drift. The numerical model is based on two-phase, gas-gas theory where snow and air mainly are transported as dilute suspension. Transport by creep and saltation is considered by imposing transport above the snow surface according to experimental knowledge. Snow is accumulated where the calculated friction velocity is below the threshold for particle movements and the new snow surface will affect the wind velocity field similar to real conditions. The numerical model is implemented in a general transient computer code based on finite- volume technique. Effects on the packing due to storage conditions, such as rainfall and temperature variations are not considered. Simulation of the development of snow accumulations around a typical porous snow fence is performed and the result seems to be in good agreement with experimental data.
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Keywords: snow drift, snow fence, cfd
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