On the basis of previous investigations of the sand aeolian ripples, cellular automata theory and recent studies on dynamics of two-phase wind-sand fluid flow, this paper presents some improvements and modifications on the existing numerical simulation of sand aeolian ripples, and discusses its stability as well.
本学位论文在总结前人关于风成沙波纹研究的基础上,以元胞自动机原理为出发点,根据风沙两相流体运动的近期研究成果,对现有风成沙波纹的数值模拟进行了修正和改进,并对其稳定性进行了理论分析,主要研究工作包括如下四个方面:1。
Numerical simulation of aeolian ripple formation;
风成沙纹形成过程模拟与形态分析
We studied the effect of particle impacting-angle on development of aeolian ripples using numerical simulation method.
采用数值模拟的方法研究了沙粒冲击角对风成沙纹形成过程及其形态特征的影响。
Remarkable progress has been made in numerical simulation of aeolian ripple over the last more than twenty years.
风成沙纹的数值模拟研究已取得了不少进展,但各家所采用的模拟方法及模拟结果存在不少差异。
Shape characteristics of the natural aeolian sand ripples and their relations with the physical characteristics of surface sand.;
自然风成沙纹的形态特征及其与地表沙物理性状的关系
The methods of large-eddy simulation,the motion of sand particles with mixed sand sizes and immersed boundary are used to simulate the formation and evolution of sand ripples and sand dunes.
采用大涡模拟和混合粒径群体沙粒运动算法结合内置边界方法来模拟沙波纹与沙丘的演化和发展,在平坦沙区形成沙波纹的同时,在沙丘上同样也出现了沙波纹的结构,即沙波纹的发展出现了多尺度现象。
The surface rarely shows such features as wind ripples or wind granule ripples.
表面上很少显示出风成沙波纹或风成细砾波纹。
Computer Simulation of Aeolian Sand Ripples and Its Stability Analysis;
风成沙波纹的计算机模拟与稳定性分析
Wavelength and Height of Aeolian Ripple in a Wind Tunnel
风成沙纹发育过程中形态变化的风洞实验研究
Effect of Impacting-angle on Development of Aeolian Ripples
冲击角对风成沙纹形态影响的机理分析
Shape characteristics of the natural aeolian sand ripples and their relations with the physical characteristics of surface sand.
自然风成沙纹的形态特征及其与地表沙物理性状的关系
The tide rippled the sand.
潮水在沙上留下了波洑沙纹。
The wind troubled the surface of the lake.
风儿把湖面吹起了波纹。
The surface of the water was rippled in the breeze.
水面被微风吹起波纹。
stir up (water) so as to form ripples.
溅起水花，形成波纹。
technology of manufacturing corrugation forming machine
波纹成型机制造技术
A fine soil was deposited by winds carrying desert dust.
风把沙漠的沙吹来，堆积成一片幼沙土。
Research on the Numerical Imitation of Sand Ripple Formation and the SPH Method;
沙纹形成的数值模拟及SPH方法研究
Study on GC Fingerprint of Volatile Components from Lygodium Japonicum
海金沙挥发性成分的GC指纹图谱研究
A light wind disturbed the smooth surface of the lake.
一阵微风使平静的湖面泛起波纹。
A sudden breeze ruffled the surface of the lake.
一阵突然的微风使湖面起了波纹。
The Influence on Current Ridge, Sand Wave and Topography of Dongfang Offshore by Typhoon;
台风对东方岸外沙波沙脊和海底地貌的影响
A hill or ridge of wind-blown sand.
沙丘风吹沙子形成的小山
Dunes are ridges of loose sand heaped up by the wind.
沙丘是散沙被风吹起堆积而成的。