Numerical simulation of three-dimensional, transient snow drifting around a cube

Abstract This paper presents the results of the numerical simulation of drifting snow surrounding a simple 2 m cubicle structure. These results are compared and verified against data from snow drifting experimental tests carried out at SANAE IV research station, Antarctica, during the summer research period of January 2002. In addition to the snow drifting field observations, wind profile data were also obtained from cup-type anemometers mounted on a 6 m wind mast. These data were employed to derive the characteristic surface roughness, shear velocity and approaching wind profile functions. The present work numerically simulates a transient three-dimensional turbulent viscous flow in an Eulerian coordinate frame including snow advection. A modified turbulent wall law is employed that accounts for the effects of snow saltation on the effective aerodynamic surface roughness. The numerical simulation employed the commercial CFD code, FLOW-3D, with additional user Fortran coding added to model the snow entrainment, subsequent accumulation or erosion of snow as well as temporal snow surface changes. The snow accumulation and erosion model is presented and discussed. The snow accumulation predicted by this numerical simulation compares favourably with the experimental results obtained from the Antarctica field testing.

[1]  Yoshihiko Hayashi,et al.  Numerical study on velocity-pressure field and wind forces for bluff bodies by κ-ϵ, ASM and LES , 1992 .

[2]  A. Robins,et al.  The flow around a surface-mounted cube in uniform and turbulent streams , 1977, Journal of Fluid Mechanics.

[3]  T. Uematsu,et al.  Three dimensional numerical simulation of snowdrift , 1993 .

[4]  C. W. Hirt,et al.  Volume-fraction techniques: powerful tools for wind engineering , 1993 .

[5]  Shuzo Murakami,et al.  Overview of turbulence models applied in CWE–1997 , 1998 .

[6]  Y. Kaneda,et al.  Three-dimensional numerical simulation of snowdrift , 1991 .

[7]  Jiyuan Tu,et al.  On numerical modeling of particle–wall impaction in relation to erosion prediction: Eulerian versus Lagrangian method , 2002 .

[8]  P. Gauer.  Blowing and drifting snow in Alpine terrain: numerical simulation and related field measurements , 1998, Annals of Glaciology.

[9]  Joel H. Ferziger,et al.  Computational methods for fluid dynamics , 1996 .

[10]  Mohamed Naaim,et al.  Numerical simulation of drifting snow: erosion and deposition models , 1998 .

[11]  Robert S. Anderson,et al.  Wind modification and bed response during saltation of sand in air , 1991 .

[12]  Ronald Greeley,et al.  Wind as a Geological Process: On Earth, Mars, Venus and Titan , 1985 .

[13]  T. M. Harms,et al.  Outdoors modelling of snowdrift at SANAE IV Research Station, Antarctica , 2003 .

[14]  John W. Pomeroy,et al.  Saltation of snow , 1990 .

[15]  G. Mann,et al.  An Intercomparison Among Four Models Of Blowing Snow , 2000 .

[16]  C. J. Apelt,et al.  Computation of wind flows over three-dimensional buildings , 1986 .

[17]  Per-Arne Sundsbø,et al.  Numerical simulations of wind deflection fins to control snow accumulation in building steps , 1998 .

[18]  C. J. Apelt,et al.  Simulation of flow past a cube in a turbulent boundary layer , 1990 .

[19]  The interaction between drifting snow and atmospheric turbulence , 1998 .

[20]  R. Bintanja.  Snowdrift suspension and atmospheric turbulence. Part I: Theoretical background and model description , 2000 .

[21]  Matthew Sturm,et al.  A snow-transport model for complex terrain , 1998 .

[22]  John W. Pomeroy,et al.  Steady-state suspension of snow , 1992 .

[23]  P. Taylor,et al.  Some aspects of the interaction of blowing snow with the atmospheric boundary layer , 1996 .

[24]  J. Humphrey,et al.  Fundamentals of fluid motion in erosion by solid particle impact , 1990 .

[25]  R. L. Brown,et al.  A two-dimensional computational model of turbulent atmospheric surface flows with drifting snow , 1993, Annals of Glaciology.