Author(s): Dwinanti Rika Marthanty
Linked Author(s): Dwinanti Rika Marthanty
Keywords: Smoothed particle hydrodynamics, free surface, water flow, curved channel, meandering dynamics
Abstract: Smoothed particle hydrodynamics (SPH) is one most noticeable meshfree method and now become very popular, and particularly for free surface flows, it is a robust and powerful method for describing deforming media (Gomez-Gesteira, et al. , 2010). SPH is a very promising method to answer 3D flow modeling in meander dynamics. Three basic characteristics of meandering process are flow structure, sediment transport, and morpho-dynamic. Helical flow as secondary current in flow structure plays the main role in characterizing of meandering dynamics. Meandering geometry is simplified as a curved channel boundary conditions. SPH procedures are developed from 3D fluid flow model and collision handling between water particles and a curved channel boundary conditions, as meandering geometry simplification. We used simple geometries based on Snell's law to represent basic particle responses to channel walls. We adapted SPH for nearly incompressible flow as an incompressible flow in a curved channel that is note bene. Viscosity plays the main role in initiating helical flow formation in the channel. Formation of helical flow is generated at downstream hemispheres part of the curved channel. This paper presents an application of SPH method to develop helical flow as a result of curvature, agreed with Camporeal et al. (2007), and even without sediment transport, agreed with da Silva (2006) and Yalin (1993). Our contribution with this research is developing SPH method for modeling helical flow in a curved channel with the aim of simulating meandering dynamics
Year: 2017