Numerical investigation of chaotic advection past a groyne based on laboratory flow experiment

被引：9
|
作者：
Zsugyel, Marton [1 ]
Tel, Tamas [2 ,3 ]
Jozsa, Janos [4 ,5 ]
机构：
[1] MTA BME Water Management Res Grp, H-1111 Budapest, Hungary
[2] Eotvos Lorand Univ, Inst Theoret Phys, H-1117 Budapest, Hungary
[3] MTA ELTE Theoret Phys Res Grp, H-1117 Budapest, Hungary
[4] Budapest Univ Technol & Econ, MTA BME Water Management Res Grp, H-1111 Budapest, Hungary
[5] Budapest Univ Technol & Econ, Dept Hydraul & Water Resources Engn, H-1111 Budapest, Hungary
来源：
ADVANCES IN WATER RESOURCES | 2014年 / 71卷
基金：
匈牙利科学研究基金会;
关键词：
Mixing; Groyne; Chaotic advection; Open flow; PTV; LCS; LAGRANGIAN COHERENT STRUCTURES; FLUID-FLOWS; RANDOM MAPS; FIELDS; RIVER; MODEL; TRANSPORT;
D O I：
10.1016/j.advwatres.2014.06.004
中图分类号：
TV21 [水资源调查与水利规划];
学科分类号：
081501 ;
摘要：
A laboratory flow past a groyne with complex hydrodynamics was investigated using surface Particle Tracking Velocimetry (PTV) technique for detecting chaotic features in fluvial mixing processes. In the reconstructed velocity field particles were deployed and tracked numerically in a Lagrangian way. Calculating some appropriate parameters (e.g. flushing times, finite-size Lyapunov exponent) originating from chaos theory, we are able to give a more detailed picture on surface mixing driven by aperiodic flows than traditional approaches, including the separation of sub-regions characterized by sharply different mixing efficiency. (C) 2014 The Authors. Published by Elsevier Ltd.
引用
收藏
页码：81 / 92
页数：12
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