亲爱的研友该休息了!由于当前在线用户较少,发布求助请尽量完整地填写文献信息,科研通机器人24小时在线,伴您度过漫漫科研夜!身体可是革命的本钱,早点休息,好梦!

Multi-dimensional rheology-based two-phase model for sediment transport and applications to sheet flow and pipeline scour

泥沙输移 机械 湍流 两相流 流量(数学) 雷诺数 沉积物 粘度 岩土工程 物理 地质学 地貌学 量子力学
作者
Cheng-Hsien Lee,Ying Min Low,Yee‐Meng Chiew
出处
期刊:Physics of Fluids [American Institute of Physics]
卷期号:28 (5) 被引量:95
标识
DOI:10.1063/1.4948987
摘要

Sediment transport is fundamentally a two-phase phenomenon involving fluid and sediments; however, many existing numerical models are one-phase approaches, which are unable to capture the complex fluid-particle and inter-particle interactions. In the last decade, two-phase models have gained traction; however, there are still many limitations in these models. For example, several existing two-phase models are confined to one-dimensional problems; in addition, the existing two-dimensional models simulate only the region outside the sand bed. This paper develops a new three-dimensional two-phase model for simulating sediment transport in the sheet flow condition, incorporating recently published rheological characteristics of sediments. The enduring-contact, inertial, and fluid viscosity effects are considered in determining sediment pressure and stresses, enabling the model to be applicable to a wide range of particle Reynolds number. A k − ε turbulence model is adopted to compute the Reynolds stresses. In addition, a novel numerical scheme is proposed, thus avoiding numerical instability caused by high sediment concentration and allowing the sediment dynamics to be computed both within and outside the sand bed. The present model is applied to two classical problems, namely, sheet flow and scour under a pipeline with favorable results. For sheet flow, the computed velocity is consistent with measured data reported in the literature. For pipeline scour, the computed scour rate beneath the pipeline agrees with previous experimental observations. However, the present model is unable to capture vortex shedding; consequently, the sediment deposition behind the pipeline is overestimated. Sensitivity analyses reveal that model parameters associated with turbulence have strong influence on the computed results.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
2秒前
cherlie应助Plum22采纳,获得20
4秒前
edisonyan完成签到 ,获得积分10
4秒前
刘宇童发布了新的文献求助10
7秒前
26秒前
大个应助刘宇童采纳,获得10
27秒前
小二郎应助xiongdi521采纳,获得10
40秒前
47秒前
xiongdi521发布了新的文献求助10
52秒前
1分钟前
1分钟前
Ava应助吕易巧采纳,获得10
1分钟前
1分钟前
1分钟前
andrele发布了新的文献求助10
1分钟前
1分钟前
吕易巧发布了新的文献求助10
1分钟前
1分钟前
1分钟前
1分钟前
2分钟前
2分钟前
Microbiota完成签到,获得积分10
2分钟前
会飞的流氓兔完成签到 ,获得积分10
2分钟前
2分钟前
DL完成签到,获得积分10
2分钟前
DL发布了新的文献求助10
2分钟前
小马甲应助科研通管家采纳,获得10
3分钟前
MchemG应助科研通管家采纳,获得100
3分钟前
大模型应助科研通管家采纳,获得10
3分钟前
李健的小迷弟应助xiongdi521采纳,获得10
3分钟前
3分钟前
闫雪发布了新的文献求助10
3分钟前
3分钟前
橙子味的邱憨憨完成签到 ,获得积分10
3分钟前
xiongdi521发布了新的文献求助10
3分钟前
隐形曼青应助闫雪采纳,获得10
3分钟前
激动的似狮完成签到,获得积分10
3分钟前
3分钟前
3分钟前
高分求助中
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3990148
求助须知:如何正确求助?哪些是违规求助? 3532119
关于积分的说明 11256456
捐赠科研通 3271016
什么是DOI,文献DOI怎么找? 1805171
邀请新用户注册赠送积分活动 882288
科研通“疑难数据库(出版商)”最低求助积分说明 809228