With the method of large-eddy simulation,the equation of spherule motion and the method of immersed boundary condition,numerical simulations of three-dimen-sional turbulent aeolian motion and the formation of sand ripples under three-di-mensional turbulent wind and the mutual actions of saltation and creeping motion were carried out. The resulting sand ripples have the form that is flat on the upwind side and steep on the leeward,which is identical to the sand ripples in nature. We also realized the self-re...
【英文摘要】
With the method of large-eddy simulation,the equation of spherule motion and the method of immersed boundary condition,numerical simulations of three-dimen-sional turbulent aeolian motion and the formation of sand ripples under three-di-mensional turbulent wind and the mutual actions of saltation and creeping motion were carried out. The resulting sand ripples have the form that is flat on the upwind side and steep on the leeward,which is identical to the sand ripples in nature. We also realized the self-re...
【基金】
the Key Project of National Natural Science Foundation of China (Grant No. 10532040)
【更新日期】
2008-07-17
【分类号】
P425.2
【正文快照】
1 Introduction As a significant global environment problem, desertification has received extensive attention. The desertification leads to land degradation in agricultural productivity, and loss of large areas of fertile land resources. It may also threat
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