Show simple item record

dc.contributor.authorTagliavini, Giorgia
dc.contributor.authorMcCorquodale, Mark
dc.contributor.authorWestbrook, Chris
dc.contributor.authorCorso, Pascal
dc.contributor.authorKrol, Quirine
dc.contributor.authorHolzner, Markus
dc.identifier.citationTagliavini, G., McCorquodale, M., Westbrook, C., Corso, P., Krol, Q., & Holzner, M. (2021). Drag coefficient prediction of complex-shaped snow particles falling in air beyond the Stokes regime. International Journal of Multiphase Flow, 140, 103652.en_US
dc.description.abstractThis study considers complex ice particles falling in the atmosphere: predicting the drag of such particles is important for developing of climate models parameterizations. A Delayed-Detached Eddy Simulation model is developed to predict the drag coefficient of snowflakes falling at Reynolds number between 50 and 2200. We first consider the case where the orientation of the particle is known a posteriori, and evaluate our results against laboratory experiments using 3D-printed particles of the same shape, falling at the same Reynolds number. Close agreement is found in cases where the particles fall stably, while a more complex behavior is observed in cases where the flow is unsteady. The second objective of this study is to evaluate methods for estimating the drag coefficient when the orientation of the particles is not known a posteriori. We find that a suitable average of two orientations corresponding to the minimum and maximum eigenvalues of the inertia tensor provides a good estimate of the particle drag coefficient. Meanwhile, existing correlations for the drag on non-spherical particles produce large errors (≈50%). A new formula to estimate snow particles settling velocity is also proposed. Our approach provides a framework to investigate the aerodynamics of complex snowflakes and is relevant to other problems that involve the sedimentation of irregular particles in viscous fluids.en_US
dc.publisherElsevier BVen_US
dc.subjectdrag coefficienten_US
dc.subjectsnow precipitationen_US
dc.subjectdelayed-detached eddy simulationsen_US
dc.titleInternational Journal of Multiphase Flowen_US
mus.citation.journaltitleInternational Journal of Multiphase Flowen_US
mus.relation.collegeCollege of Engineeringen_US
mus.relation.departmentCivil Engineering.en_US
mus.relation.universityMontana State University - Bozemanen_US

Files in this item


This item appears in the following Collection(s)

Show simple item record

Except where otherwise noted, this item's license is described as cc-by-nc-nd

MSU uses DSpace software, copyright © 2002-2017  Duraspace. For library collections that are not accessible, we are committed to providing reasonable accommodations and timely access to users with disabilities. For assistance, please submit an accessibility request for library material.