摘要: High-speed motion pictures (2000 frames/s) of saltating spherical glass microbeads (of diameter 350–710 μm and density 2·5 g/cm 3 ) were taken in an environmental wind tunnel to simulate the planetary boundary layer. Analysis experimental particle trajectories show presence a substantial lifting force intermediate stages trajectories. Numerical integration equations including Magnus produced good agreement with experiment. Typical spin rates order several hundred revolutions per second some limited proof this is presented. Average values frequency distributions for liftoff impact angles are also The average lift-off experiments 50° 14° respectively. A semi-empirical procedure determining trajectory associated given conditions developed.
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sci-hub.se 参考文章(14)
John M. Ellwood, Peter D. Evans, an, Small Scale Aeolian Bedforms SEPM Journal of Sedimentary Research. ,vol. Vol. 45, pp. 554- 561 ,(1975) , 10.1306/212F6DCA-2B24-11D7-8648000102C1865D
L. B. Torobin, W. H. Gauvin, Fundamental aspects of solids‐gas flow: Part I: Introductory concepts and idealised sphere motion in viscous regime Canadian Journal of Chemical Engineering. ,vol. 37, pp. 129- 141 ,(1959) , 10.1002/CJCE.5450370401
Henry Taube, BRIDGING AND NON-BRIDGING LIGAND EFFECTS IN REDOX REACTIONS OF METAL IONS Canadian Journal of Chemistry. ,vol. 37, pp. 129- 137 ,(1959) , 10.1139/V59-019
Hans Albert Einstein, El-Sayed Ahmed El-Samni, Hydrodynamic Forces on a Rough Wall Reviews of Modern Physics. ,vol. 21, pp. 520- 524 ,(1949) , 10.1103/REVMODPHYS.21.520
W. S. Chepil, Dynamics of Wind Erosion Soil Science. ,vol. 60, pp. 305- 320 ,(1945) , 10.1097/00010694-194510000-00004
L. B. Torobin, W. H. Gauvin, Fundamental aspects of solids-gas flow: Part IV: The effects of particle rotation, roughness and shape Canadian Journal of Chemical Engineering. ,vol. 38, pp. 142- 153 ,(1960) , 10.1002/CJCE.5450380504
J.D. Iversen, J.B. Pollack, R. Greeley, B.R. White, Saltation threshold on Mars: The effect of interparticle force, surface roughness, and low atmospheric density Icarus. ,vol. 29, pp. 381- 393 ,(1976) , 10.1016/0019-1035(76)90140-8
The nature of saltation and of ‘bed-load’ transport in water Proceedings of The Royal Society A: Mathematical, Physical and Engineering Sciences. ,vol. 332, pp. 473- 504 ,(1973) , 10.1098/RSPA.1973.0038
Bruce R. White, Ronald Greeley, James D. Iversen, James B. Pollack, Estimated grain saltation in a Martian atmosphere Journal of Geophysical Research. ,vol. 81, pp. 5643- 5650 ,(1976) , 10.1029/JB081I032P05643
W. S. Chepil, The use of evenly spaced hemispheres to evaluate aerodynamic forces on a soil surface Eos, Transactions American Geophysical Union. ,vol. 39, pp. 397- 404 ,(1958) , 10.1029/TR039I003P00397