沙坑局部含沙水流特性的数值模拟研究

李健; 金中武; 杨文俊

PDF(1703 KB)

raybet体育在线院报 ›› 2013, Vol. 30 ›› Issue (9) : 1-4.

江湖泥沙与治理

沙坑局部含沙水流特性的数值模拟研究

李健,金中武,杨文俊

作者信息 +

Numerical Simulation of Water Flow and Sand Distribution around Sand-pit

LI Jian, JIN Zhong-wu, YANG Wen-jun

Author information +

文章历史 +

摘要

分析了FLUENT流体商业软件用于河流动力学问题研究的难点和可行性,应用混合物模型对存在矩形沙坑的河道分清水和含沙水流2种情况进行了数值模拟并对比分析。计算结果表明:水沙耦合计算模式的混合物模型可以较好地模拟河道中的水沙两相流输移现象;泥沙相对流体的动量影响明显,且降低了收敛速度;泥沙会抑制水流的内部紊动。沙坑内部拐角处会形成涡旋的次生流,造成向上游的溯源冲刷和下游的淤积。

Abstract

The difficulty and feasibility of applying FLUENT software to river dynamics were analyzed. The mixture model was used to simulate the river with rectangular sand pit in two conditions (clear water and sediment-laden water). Results show that the coupled calculation of the sediment laden water could well simulate the two-phase water-sediment transport in river. The existence of sediment influences the momentum variation of water, reduces the convergence speed of the modeling, and also restrains the turbulence of water. Secondary vortex flow forms at the sand pit corner which will cause scouring towards the upstream and deposit in the downstream.

导出引用

李健,金中武,杨文俊. 沙坑局部含沙水流特性的数值模拟研究[J]. raybet体育在线院报. 2013, 30(9): 1-4

LI Jian, JIN Zhong-wu, YANG Wen-jun. Numerical Simulation of Water Flow and Sand Distribution around Sand-pit[J]. Journal of Changjiang River Scientific Research Institute. 2013, 30(9): 1-4

中图分类号： TV149.2

参考文献

[1] 叶茂,伍超, 胡耀华,等.FLUENT软件在水利工程中的应用[J] .水利水电科技进展,2006,26(3):1-7.(YE Mao, WU Chao, HU Yao-hua, et al. Application of FLUENT to Hydraulic Projects [J] . Advances in Science and Technology of Water Resources, 2006, 26(3): 1-7.(in Chinese)
[2] CHEN Q, DAI G Q, LIU H W. Volume of Fluid Model for Turbulence Numerical Simulation of Stepped Spillway Overflow[J] . Journal of Hydraulic Engineering, ASCE,2002, 128(7): 683-688.
[3] 刁明军, 杨永全, 王玉蓉,等. 挑流消能水气二相流数值模拟[J] .水利学报, 2003,(9):77-82.(DIAO Ming-jun, YANG Yong-quan, WANG Yu-rong, et al. Numerical Simulation of Water-Air Two-phase Jet Flow from Flip Bucket to Plunge Pool[J] . Chinese Journal of Hydraulic Engineering, 2003, (9): 77-82.(in Chinese)
[4] 周勤,伍超,赵元弘,等.“S”型溢洪道水流特性试验与数值模拟研究[J] .水力发电学报,2005, 24(3):88-92.(ZHOU Qin, WU Chao, ZHAO Yuan-hong, et al. Experiment and Numerical Simulation of Flow Characteristics on “S” Style Spillway[J] . Journal of Hydroelectric Engineering, 2005, 24(3): 88-92.(in Chinese)
[5] COLEMAN N L. Effects of Suspended Sediment on the Open-Channel Flow Velocity Distribution [J] . Water Resources Research, 1986, 22(10): 1377-1384.
[6] CAO Zhi-xian, WEI Liang-yan, XIE Jian-heng. Sediment-laden flow in open channels from two-phase flow viewpoint [J] .Journal of Hydraulic Engineering, ASCE, 1995, 121(10): 725-735.