Snow Entrainment Coefficient Estimated by Field Observations and Wind Tunnel Experiments
Publication: Journal of Cold Regions Engineering
Volume 19, Issue 4
Abstract
The boundary condition for concentration of snow particles at the bed is necessary to calculate snowdrifts by a numerical analysis model. The flux type or the gradient type boundary conditions are reasonable. An idea of an entrainment coefficient of snow particle at the snow surface is useful. The values of the coefficient are considered to be a function of the density and viscosity of the working fluid and the properties of snow particles. In this paper, the values of the coefficient are estimated based on the turbulence model and the distribution of snow particle flux observed at the Mizuho Station, Antarctica in 2000, assuming the steady, fully developed flow over a flat snow surface. The snow entrainment coefficient is two or three orders smaller than the sand entrainment coefficient in a river. The reason is that the specific weight of snow particles in air is much larger than that of sand particles in water.
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Acknowledgments
Part of this study was supported by Grant-in Aid for Scientific Research (C) (Grant No. MESSC-JP13650565; Chief Researcher: Yusuke Fukushima) by the Japanese Ministry of Education, Science, Sport, and Culture. The writers express their appreciation.
References
Akiyama, J., and Fukushima, Y. (1985). “Entrainment of non-cohesive bed sediment into suspension.” External Memorandum 195, St. Anthony Falls Hydraulic Lab., Univ. of Minnesota, Minneapolis, 33.
Eto, T., and Fukushima, Y. (2001a). “Analysis of turbidity currents in submarine canyon using turbulence model.” J. Japanese Coastal Eng., JSCE, 48, 461–465.
Eto, T., and Fukushima, Y. (2003). “Proposal of numerical simulation model on powder snow avalanches using turbulence model.” Seppyo (J. Japanese Soc. of Snow and Ice), 65(1), 3–14.
Eto, T., and Fukushima, Y. (2001b). “Numerical analysis of turbidity currents using turbulence model.” Paper Summaries of 8th Int. Symp. on Flow Modeling and Turbulence Measurements (FMTM2001), IAHR, Tokyo, 169–170.
Fukushima, Y. (1986). “Analytical study of powder snow avalanches.” Seppyo (J. Japanese Soc. of Snow and Ice), 48(4), 189–197.
Fukushima, Y., Eto, T., Ishiguro, S., Kosugi, K., and Sato, T. (2001). “Flow analysis of developing snowdrifts using a turbulence model.” Seppyo (J. Japanese Soc. of Snow and Ice), 63(4), 373–383.
Fukushima, Y., and Parker, G. (1985). “Study on self-accelerating turbidity currents.” Proc., 32nd Conf. on Coastal Engineering, JSCE, 32, 253–257.
Garcia, M. (1990). “Depositing and eroding sediment driven flows: turbidity currents.” Project Rep. No. 306, St. Anthony Falls Hydraulic Lab., Univ. of Minnesota, 179.
Graf, W. H. (1984). Hydraulic of sediment transport, Water Resources Publications, Littleton, Colo., 42.
Ikeda, S., ed. (1992). Non-linear phenomena in fluids—Mathematical analysis and their application, Asakura, 74–78.
Nishimura, K., and Nemoto, M. (2001). “Blowing snow observations at Mizuho Station, Antarctica.” Preprints of the 2001 Conf., Japanese Society of Snow and Ice, 147.
Parker, G. (1982). “Condition for the ignition of catastrophically erosive turbidity currents.” Marine Geology, 46, 307–327.
Parker, G., Fukushima, Y., and Pantin, H. M. (1986). “Self-accelerating turbidity currents.” J. Fluid Mech., 171, 145–182.
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© 2005 ASCE.
History
Received: Nov 13, 2002
Accepted: Nov 5, 2003
Published online: Dec 1, 2005
Published in print: Dec 2005
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