Numerical Simulation of Sand Dune Formation with Periodical Uniform Stream Field

Abdikerem, Xamxinur; Eziz, Akbar; Abudoureheman, Abudoukelimu; Gheni, Mamtimin

doi:10.4028/www.scientific.net/amr.33-37.1069

Cited by 3 publications

(2 citation statements)

References 2 publications

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“…Equation (12) expresses the main movement of the sand suspension and saltation form; due to limitation, the discussion of sand creep and avalanche phenomenon are ignored and the Nishimori and Ouchi [4] and Miao et al [5] method are directly used. Some interesting and reasonable numerical results are obtained [7][8][9][10]. In this study similar numerical methods are used for airflow and sand flow field.…”

Section: The Saltation Dynamics Model Of Sand Grainsmentioning

confidence: 83%

Numerical Modeling and Simulation of Wind Blown Sand Morphology under Complex Wind-Flow Field

Abdikerem

Wang

Jin

et al. 2014

Journal of Applied Mathematics

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The flow field and the sand flow field constitutive equations are analyzed at first, then the different desert highway numerical models are established by considering the crossroad and by changing the road surface height and air stream flow field, then three kinds of different models with different complex air flow fields are made for simulating the sand ripple formation process by weak coupling of air and sand flow field, and finally the numerical simulations of these models are conducted and the affect process of sand morphology under complex air flow fields are discussed. The results show that under the uniform airflow field, the straight parallel ripple formed and the flared ripple formed in the middle region of the crossroad, and the wavelength of the ripples on the desert highway is bigger than that of the ripples around the road when the road height is higher than that of the sand surface height. Under the nonuniform complex airflow field, the complex curved ripples are formed, and some of the local area, where the whirlwind exits, no ripples are formed.

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Section: The Saltation Dynamics Model Of Sand Grainsmentioning

confidence: 83%

Numerical Modeling and Simulation of Wind Blown Sand Morphology under Complex Wind-Flow Field

Abdikerem

Wang

Jin

et al. 2014

Journal of Applied Mathematics

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“…The 1/4 of the world land and 1/6 of the population of the world are suffering from the desertification. The prevention and control the desertification is one of the key problems, and it is very important to conduct the study of desertification, especially how to globally control and predict the desertification and mechanism of the sand movement by considering the fixed, semi-fixed and free sand desert field [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on Aeolian Sand Ripples Forming and Moving Process in Desert Highway

Ablimit

Gheni

et al. 2011

KEM

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In this paper, the sand break into highway problem in desert, which is caused by the sand flow blown by wind, is studied. The mathematical models are introduced by considering the fixed, semi-fixed and free sand desert fields based on the fluid dynamics and the sand particle dynamics. Different kinds of numerical models are made by changing the desert highway height, wind flow direction and its uniformity. The weak coupling method is used due to spatial relationships between air flow field and the sand flow field. Finally, by coupling the airflow field and sand flow field with desert highway, the numerical simulations of sand forming process on desert highway are conducted. The numerical results shown, that the wind blown sand breaks into highway easier when wind direction perpendicular highway and if the highway height higher than the range size of the sand surface the wind blown sand break into highway is more difficult.

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Dynamics and Numerical Modeling of Sandy Desert Morphology Caused by Aeolian Transport of Sand Particles

Abdikerem

Gheni

Ablimit

et al. 2011

KEM

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Wind caused the much sediment fluxes leading to both erosion and deposits in the sandy desertification area, and the much kind of beautiful sandy desert morphologies are formed. This is really crucial to the development of the dynamic behaviour of aeolian transport of sand particles. The sand desert morphologies are representing significant information archives for understanding the desertification problem. Dynamics and numerical modeling provides an essential tool for studying the aeolian transport of sand particle and morphology of sand desert such as ripple and dune. In this study, the mathematical models based on the dynamics are analyzed by considering the several keys as saltation, creep, suspension, avalanche and its threshold condition etc. for sand morphology forming processes. Then due to sand flow field real characteristics, the establishing process of stream flow field are analyzed, and the implication relationships as well as the coupling process between uniform stream flow field and the sand flow field are analyzed. Finally, the sand flow field models is discretized, and different kinds of sandy desert morphology are simulated by considering the sand particle size and mass in fixed, semi-fixed and free sand flow field area.

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Numerical Simulation of Sand Dune Formation with Periodical Uniform Stream Field

Cited by 3 publications

References 2 publications

Numerical Modeling and Simulation of Wind Blown Sand Morphology under Complex Wind-Flow Field

Numerical Modeling and Simulation of Wind Blown Sand Morphology under Complex Wind-Flow Field

Numerical Study on Aeolian Sand Ripples Forming and Moving Process in Desert Highway

Dynamics and Numerical Modeling of Sandy Desert Morphology Caused by Aeolian Transport of Sand Particles

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