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Thermal diffusion characteristics of atmosphere-particle two phase flow in dust storm

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Abstract

A model, coupling metrological dynamic model MM5 and dust transport model, is developed for the atmosphere-particle two phases flow of dust storm. The simulations of the dust storm events in north China with a geographic information database are performed using the model, and represent an overview of dust transport pathways and particles concentration distribution over the north China. The comparison between computations and practical observations shows that the simulations succeed in description of dust storm evolvement and particle transport behavior. Based on the computations and analysis, the characteristics of particle transport, especially well-concerning the factor of the particle thermal diffusion, are studied. A new definition of mass transfer Grd is put forward to discover the internal principle of particle thermal diffusion at various atmospheric layers. Several phenomena, such as thermal diffusion item QT–Grd distribution, and relationships, Particle Grd probability function, are obtained. The investigation indicates particle thermal diffusion can be not ignored in mesoscale atmospheric-particle multiphase flow.

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Acknowledgments

This research is supported by the Major Program of Nature Science Foundation of China (No. 59995460) and the Major Fundamental Research Program of Ministry of Science and Technology Of China (No. G1999022209).

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Authors and Affiliations

  1. Thermal Energy Engineering Institute, Southeast University, 210096, Nanjing, China

    Xihua Wang & Fan Gu

  2. Institute of Particle and Two-phase Measurement Technology, University of Shanghai for Science and Technology, 200093, Shanghai, China

    Xihua Wang

  3. Department of Atmosphere science, Nanjing University, 210093, Nanjing, China

    Tijian Wang & Jianping Tang

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  1. Xihua Wang
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  2. Tijian Wang
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  3. Jianping Tang
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  4. Fan Gu
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Correspondence to Fan Gu.

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Wang, X., Wang, T., Tang, J. et al. Thermal diffusion characteristics of atmosphere-particle two phase flow in dust storm. Heat Mass Transfer 41, 306–314 (2005). https://doi.org/10.1007/s00231-004-0533-5

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  • DOI: https://doi.org/10.1007/s00231-004-0533-5

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