Snowdrift modeling in the CRREL wind tunnel

TitleSnowdrift modeling in the CRREL wind tunnel
Publication TypeConference Proceedings
Year of Conference1993
AuthorsHaehnel, R. B., Wilkinson J. H., and Lever J. H.
Conference Name61st Annual Western Snow Conference
Series TitleProceedings of the 61st Annual Western Snow Conference
Date PublishedJune 1993
PublisherWestern Snow Conference
Conference LocationQuebec City, Quebec
KeywordsScale models, Snow drifting, Wind tunnel

We modified CRREL’s snow drifting wind tunnel to generate a flow field that simulates the atmospheric boundary layer and installed a trap for measuring the average mass flux. We replaced the previously used activated clay with glass beads and developed a moiré photography system to measure drift profile.We then conducted a series of preliminary calibration tests to verify the similarity of model and full-scale snowdrifts. Two-dimensional calibrations included a Wyoming snow fence and a step. Three-dimensional tests included a right circular cylinder and a rectangular prism. Generally, the agreement was good between model and prototype drift geometry’s. However, there is insufficient quantitative field data available to thoroughly validate the model results.