Extension and application of quasi-Direct Numerical Simulation to Bedload Sediment Transport

流域泥沙运移准直接数值模拟的推广与应用

• 批准号: 23560612
• 负责人: WELLS John C.
• 金额: $ 3.41万
• 依托单位: Ritsumeikan University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23560612/
• 关键词: 砂リップル; 数値シミュレーションの検証; 潤滑論; 粒子同士衝突; 流体力; 固体液体相対作用; DNS; contact modelling; lubrication force; surface roughness; free surface; fluid force; bedload transport; ripple formation; particle sorting; sorting; seiving

(1) To provide benchmark data for numerical simulations of sediment ripple formation, we executed a small-scale rotating drum experiment and analyzed video recordings. The resulting data provided previously unavailable data for particle Reynolds number less than 2.5, i.e. in the "hydraulically smooth" regime. Also, the drum was more than 4 times smaller than in previous research, which will allow easier comparison with highly-resolved numerical simulations(2) We provided a theoretical estimate of the importance of fluid inertia in the gap between colliding particles, which has been neglected in earlier modelling and analysis of immersed particle rebound.(3) We developed integral relations that will be applicable to precisely compute the force on a solid particle near a free surface and other fixed or moving solid bodies.

(1)为了给沉积物波纹形成的数值模拟提供基准数据，我们进行了小型转鼓实验并分析了视频记录。所得数据提供了先前无法获得的颗粒雷诺数小于 2.5 的数据，即在“水力平滑”状态下的数据。 此外，滚筒比以前的研究小了 4 倍以上，这将更容易与高分辨率数值模拟进行比较(2) 我们提供了碰撞粒子之间间隙中流体惯性重要性的理论估计，这在早期的浸没粒子回弹建模和分析中被忽略了。(3) 我们开发了积分关系，适用于精确计算自由表面附近的固体粒子和其他固定或移动固体上的力 尸体。

项目成果

A Front-Tracking Method for Three-Phase Computations of Solidification with Volume Change

体积变化凝固三相计算的前跟踪方法

• DOI: 10.1252/jcej.13we169
• 发表时间: 2013
• 期刊: JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
• 影响因子: 0.8
• 作者: T.V. Vu;G. Tryggvason;S. Homma;J.C. Wells;H Takakura
• 通讯作者: H Takakura

Experimental study of sedimentary ripples formation in a cylindrical rotating tank

圆柱形旋转槽内沉积波纹形成的实验研究

• 发表时间: 2011
• 作者: Y. Cui; J. C. Wells,
• 通讯作者: J. C. Wells,

Principal Component Analysis on Horizontal Acoustic Doppler Current Profilers Measurement

水平声多普勒电流剖面仪测量的主成分分析

• 作者: PHAN;Tuy N.M.
• 通讯作者: Tuy N.M.

Principal Component Analysis on Horizontal Acoustic Doppler Current Profilers Measurement in a Tidal River

潮汐河中水平声学多普勒海流剖面仪测量的主成分分析

• 发表时间: 2014
• 期刊: Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulics Engineering)
• 作者: Tuy N. M. P.;J. C. Wells;Y. Uchiyama;S. Ishii;J. S. Bonner;M. S. Islam;W..D. Kirkey
• 通讯作者: W..D. Kirkey

Integral Relations, Kinematic And Dynamic, between the Flow at a Liquid Surface and the Subsurface Flowfield

液体表面流动与地下流场之间的运动学和动力学积分关系

• 发表时间: 2012
• 作者: 金岡正信;水谷夏樹;小西秀明;荒木重信;竹原幸生;玉野富雄;John C. Wells
• 通讯作者: John C. Wells