Methods for Numerical Modelling of Snowdrift

Two basic modelling concepts are investigated at the Cold Climate Research Centre in Narvik:

• Eulerian, Continuum Two-Phase Modelling
• Lagrangian-Eulerian, Particle Tracking Modelling

Some basic requirements for numerical snowdrift modelling

• Basis code/algorithm must be verified
• Snow transport calculations for transport by saltation/creep and suspension
• Evaluation of settling, deposition and erosion on snow surface
• Proper modelling of snow transport density with height
• Modelling of a snow surface that continuous changes with erosion and deposition, since the surface itself will influence the further development in the snowdrift process
• Verification of snow drift model
   

Left: Comparison between field measurement of snow mass concentration and simulated snow particles over the snow surface (Sundsbø&Hansen, 1997).

Left: Numerical simulation of the development in horizontal snow transport rate from a zero drift boundary to saturated conditions are reached (Sundsbø&Bang, 1998).

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