Saltation in wind blown sand |
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Authors: | Jiujiang Zhu Zhenbang Kuang Xueyong Zou Yuzhang Liu |
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Institution: | (1) Institute of Mechanics, Chinese Academy of Sciences, 100080 Heijing, China;(2) Shanghai Jiaotong University, 200240 Shanghai, China;(3) Institute of Desert, Chinese Academy of Sciences, 730000 Lnzhou, China |
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Abstract: | The Boltzmann equation of the sand particle velocity distribution function in wind-blown sand two-phase flow is established
based on the motion equation of single particle in air. And then, the generalized balance law of particle property in single
phase granular flow is extended to gas-particle two-phase flow. The velocity distribution function of panicle phase is expanded
into an infinite series by means of Grad’s method and the Gauss distribution is used to replace Maxwell distribution. In the
case of truncation at the third-order terms, a closed third-order moment dynamical equation system is constructed. The theory
is further simplified according to the measurement results obtained by stroboscopic photography in wind tunnel tests.
Project supported by the National Natural Science Foundation of China (Grant Nos. 49301002, 19672022).
This work was originally done in Xi’an Jiaotong University. |
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Keywords: | sallation blown sand turbulent boundary flow |
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