1) vortex ripple
涡动沙纹
2) sand ripple movement
沙纹移动
1.
The study of sand ripple movement is very important in the research of aeolian sand geomorphology.
同时,求得沙纹移动速度VR与局地风速VL之间的实验关系式为VR=1 58×(VL-5。
3) Vortex pattern
涡纹
1.
Vortex pattern in accordance with the characteristics of center circle divided into four categories, the center for the circle classⅠ, the center for the nail classⅡ, the center for the dots classⅢ, the Center for the blank classⅣ.
涡纹是最早装饰在青铜器上的纹饰之一,它的基本形态是中心为一个圆圈,沿边缘有向内旋转的多条弧线,流行于商代早期到春秋战国时期,是具有典型时代特色的几何纹饰。
4) ripple
[英]['rɪpl] [美]['rɪpḷ]
沙纹
1.
Experimental study on characteristics of flow field over asymmetric rippled bed under nonlinear shallow water wave;
浅水非线性波作用下沙纹床面底层流动特性试验研究
5) sand ripple
沙纹
1.
Experimental study on turbulent structure of flow over sand ripples in open channel;
明渠沙纹床面湍流结构实验研究
2.
Disturbances with various patterns were exerted to the open channel flow in a flume to quantitatively investigate the variation of turbulence structure during sand ripple formation and its influence on sand movement and river bed evolution.
本文通过在水槽实验中采集的流速过程数据,定量地研究了沙纹阶段明渠水流在不同形式扰动作用下的湍流结构,以及湍流结构对泥沙运动和床面演化的影响。
3.
In the flow on a mobile bed in an open channel, sand ripple often appears after the sediment begins to move.
动床水流中 ,泥沙起动之后 ,往往要出现沙纹 ,沙纹成因各家的解释不一· 白玉川 ,罗纪生的观点是 :沙纹的尺度较小 ,主要是由于明渠层流不稳定性波或床面近壁流层中小尺度拟序结构发展演化所致· 当床面边界附近扰动波或拟序结构以及水流自身所产生的床面底部切应力大于Shields切应力后 ,床面即产生响应 ,形成沙纹 ;如果扰动所产生的扰动切应力频率接近床面泥沙固有频率 ,则产生与泥沙颗粒的共振 ,这种现象也称之为“泥沙的检波性质” ,此时床面发生最大响应 ,沙纹发展速度也最快
6) sediment transport by vortex
旋涡输沙
补充资料：纹风不动
1.形容一点儿也不动。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条