Study of flow characteristics within randomly distributed submerged rigid vegetation

来源 :水动力学研究与进展B辑 | 被引量 : 0次 | 上传用户:bostangul
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Flow through submerged rigid vegetation has been studied both analytically and experimentally.The Reynolds stress,present in the governing equation,has been modeled using one of the turbulent stress equations,adopted in numerous cases.The advantage of this turbulent stress model is to replace the mixing length nonlinear term of the stress with a linear relation between stress and the velocity gradient.The velocity field and shear stress are obtained by solving the governing force balance equation numerically.A correlation,validated with the experimental results,has been developed for the relevant non-dimensional numbers.
其他文献
An unstructured mesh Reynolds-averaged Navier-Stokes (RANS) solver has been developed for numerical simulation of violent sloshing flows inside a tank with complicated inner structures.The numerical solver employs the unstructured multi-dimensional tangen
We consider strongly nonlinear long waves on the surface of a homogeneous fluid layer. By modifying the formulation for the high-order spectral (HOS) method for waves in water of finite depth, we present a higher-order nonlinear system for the surface ele
The hydrodynamics in a straight open channel with a multiple-embayment groyne field was investigated using the detached-eddy simulation (DES).A series of short groynes were included on a 1:3 side slope of the channel.This work focuses on the turbulent coh
The characteristics of the acceleration a and its correlation with the vortex core in the swirling flow are analyzed in this paper. The swirling flows of four swirl numbers ( Sn= 0, 0.10, 0.20 and 0.36) are simulated by the direct numerical simulation, an
The hydrodynamics of turbulent flow through submerged flexible vegetation is investigated in a flume using acoustic Doppler velocimetery (ADV) measurements.The flow characteristics such as the energetics and momentum transfer derived from conventional spe
A numerical investigation of flow past a square cylinder with a circular bar upstream and a splitter plate downstream is carried out in this paper by lattice Boltzmann method (LBM). The combination of the three obstacles and LBM is the main novelty of the
A slender cylindrical member is the fundamental component of many coastal and offshore structures.It is essential to understand the action of breaking waves on structural members since,when these members are subjected to wave impact load,the structural da
A practical numerical tool is developed to evaluate ship waves of high speed displacement ships on the basis of potential flow theory,in which high order boundary element method (HOBEM) based on biquadratic shape functions is applied to solve the boundary
Almost everything I have done in the last twenty years is based on what I have discovered from studying ocean phenomena. Specifically, the waves on the surface of the ocean and their dynamics. Two items stand out: The first one is from studying the evolut
The floating-vegetation island (FVI) is widely used in river restoration projects for its decontamination effect for the pollutants. A physical experiment is conducted in this paper to study the flow regime near the FVI to better understand the role playe