A new immersed boundary method for simulating free-surface flows around arbitrary objects

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

With the presence of arbitrary objects, such as gravels, boulders, woody debris, and various hydraulic structures, the hydrodynamics in a river channel are complex. They are of great interest to the understanding of the river hydraulics and geomorphology. On the other hand, due to the arbitrary geometric shapes of the objects, it is extremely difficult to model them using the traditional approach of generating body-fitted meshes. To cope with this, Immersed Boundary Method (IBM) can be used to approximate the effect of objects. However, most previous IBM methods are proposed with structured meshes as the background mesh. Many of them also lack the capability to model the free surface. In this paper, we present a new IBM method under the framework of unstructured mesh, which greatly extends the modeling capability. It also considers the effect of the free water surface using the Volume-of-Fluid (VOF) method. The new method has been implemented in the open source CFD framework Open FOAM. Simulation examples will be shown to showcase the capability of the new method.

Original languageEnglish (US)
Title of host publicationProceedings of the International Conference on Fluvial Hydraulics, RIVER FLOW 2014
PublisherCRC Press/Balkema
Pages141-146
Number of pages6
ISBN (Print)9781138026742
DOIs
StatePublished - Jan 1 2014
Event7th International Conference on Fluvial Hydraulics, RIVER FLOW 2014 - Lausanne, Switzerland
Duration: Sep 3 2014Sep 5 2014

Publication series

NameProceedings of the International Conference on Fluvial Hydraulics, RIVER FLOW 2014

Other

Other7th International Conference on Fluvial Hydraulics, RIVER FLOW 2014
CountrySwitzerland
CityLausanne
Period9/3/149/5/14

All Science Journal Classification (ASJC) codes

  • Nature and Landscape Conservation
  • Water Science and Technology

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