EGU23-10411, updated on 26 Feb 2023
EGU General Assembly 2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Development of a snowdrift model with the lattice Boltzmann method and comparison with the observation results

Seika Tanji1, Masaru Inatsu2,3, and Tsubasa Okaze4
Seika Tanji et al.
  • 1Hokkaido University, Graduate School of Science, Japan (
  • 2Faculty of Science, Hokkaido University
  • 3Center for Natural Hazards Research, Hokkaido University
  • 4School of Environment and Society, Tokyo Institute of Technology

We developed a snowdrift model to evaluate the snowdrift height around snow fences, which are often installed along roads in snowy, windy locations. The model consisted of the conventional computational fluid dynamics solver that used the lattice Boltzmann method and a module for calculating the snow particles’ motion and accumulation. The calculation domain was a half channel with a flat free-slip boundary on the top and a non-slip boundary on the bottom, and an inflow with artificially generated turbulence from one side to the outlet side was imposed. In addition to the reference experiment with no fence, experiments were set up with a two-dimensional and a three-dimensional fence normal to the dominant wind direction in the channel center. The estimated wind flow over the two-dimensional fence was characterized by a swirling eddy in the cross-section, whereas the wind flow in the three-dimensional fence experiment was horizontally diffluent with a dipole vortex pair on the leeward side of the fence. Almost all the snowdrifts formed on the windward side of the two-dimensional and three-dimensional fences and the outlines were reasonable for the observation results. The snowdrift around the three-dimensional fence also formed along the split streaks on the leeward side. Our results suggested that the fence should be as long as possible to avoid snowdrifts on roads.

How to cite: Tanji, S., Inatsu, M., and Okaze, T.: Development of a snowdrift model with the lattice Boltzmann method and comparison with the observation results, EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-10411,, 2023.