Study of the conditions for the occurrence of aeolian microrelief
https://doi.org/10.15514/ISPRAS-2019-31(6)-15
Abstract
The possibilities of numerical modeling of the motion of hydrodynamic flows around objects of complex shape allow us to consider the results of calculations as one of the ways to understand the mechanisms of wind removal of sand particles. To study the conditions for the occurrence of microrelief, a number of numerical experiments are carried out using the open package OpenFOAM. Over inhomogeneities of the surface, determined by the features of the mutual arrangement of particles, there are areas of pressure reduction, near which the wind removal of particles is more likely. The reason for this decrease in pressure is a different kind of rarefaction of the spatial arrangement of surface elements: a change in distance, a change in the orientation of the structure in space, a change in the angle between planes containing particles. Due to the decrease in pressure, an increase in the air velocity at the surface and the occurrence of microvortices occur.
Keywords
Supporting agencies: The author is grateful to O.G. Chkhetiani for useful consultations and discussions, M.V. Kraposhin, S.V. Strizhak for help in learning the principles of working with OpenFoam. The study was partially supported by the program of the Presidium of the Russian Academy of Sciences No. 12 (project KP19-270).
About the Author
Elena Aleksandrovna Malinovskaya
A.M. Obukhov Institute of Atmospheric Physics RAS
Russian Federation
Ph.D. in Physics and Mathematics, researcher at the Laboratory of Geophysical Hydrodynamics
Russian Federation
Ph.D. in Physics and Mathematics, researcher at the Laboratory of Geophysical Hydrodynamics
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Review
For citations:
Malinovskaya E.A. Study of the conditions for the occurrence of aeolian microrelief. Proceedings of the Institute for System Programming of the RAS (Proceedings of ISP RAS). 2019;31(6):225-236. (In Russ.) https://doi.org/10.15514/ISPRAS-2019-31(6)-15
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