Experiment Investigation and Numerical Simulation of Snowdrift on a Typical Large-Span Retractable Roof

Table 1

Computation conditions.

Conditions	Settings
Computational domain	220 m (x) × 40 m (y) × 24 m (z)
Number of elements	Approximately 1,500,000
Minimum mesh size	0.04 m
Inflow boundary	Wind velocity profile (see equation (8)), where and z0 are 7.4 m/s and 0.9 m, respectively; Snow fraction profile (see equation (12))
Outflow boundary	Zero gradient condition; the wind velocity gradient ∂u/∂n and snow fraction gradient ∂f/∂n are set to zero (outflow)
Upper face and side	Zero gradient condition for all variables; the normal components of the wind velocity with respect to the boundaries are set to zero (symmetry)
Building and ground surface	No-slip boundary condition (wall), except that the wall roughness z0 = 5.0 × 10^−5 for the snow surface
Turbulence model	SST k-w model, k-kl-w model, realizable k-ε model
Multiphase model	Mixture model