Numerical Simulation of Flow around a Spur Dike with Free Surface Flow in Fixed Flat Bed

Abstract

This paper presents a numerical model to simulate two-dimensional flow near a spur-dike. The Computational Fluid Dynamics (CFD) program namely Nays 2D has been used to simulate the flow field in a fixed flat bed around the spur dike introduced into the flow at 90° to the stream-wise direction. Cubic-Interpolated PseudoParticle (CIP) method was used as finite difference method to analyze the advection terms. In addition, several turbulence closurer models k-ε model, zero equation model and constant eddy viscosity model were applied and compared in order to achieve the best result. The simulated results were compared with existing experimental and computed data which agreed satisfactorily. Achieved results can prove that flow structure simulation around a spur dike could be done by Nays 2D numerical modelling very well.

A comparative study on thermo-fluid characteristics of free and wall-bounded cross-flow heat exchangers

“…To study wake flow behind bluff bodies, it is important to measure the reattachment length and maximum recirculation width of the separated flow. The reattachment length (𝐿 𝑟 ) and maximum recirculation width (𝑊 𝑟 ) might be defined as the size of the flow separation bubble in the streamwise direction (rear point distance to the stagnation point of streamwise velocity [55]) and crosswise direction (the symmetry axis distance to the stagnation point of crosswise velocity [56]), respectively, see Fig. 9(a).…”

Numerical investigation of flow field around T-shaped spur dyke in a reverse-meandering channel

“…However, the RNG k À 1 model can predict the mean velocities and hence recommend the same. Kafle (2013) uses a 2D numerical model with CIP techniques to simulate flow field in spur dyke present at 90-degree channel bend. The turbulence models such as k À 1 model, zero equation models, and constant eddy viscosity model were implemented and compared.…”