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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/5282

Title: Free-surface modelling technology for compressible and violent flows
Authors: Heyns, JA
Harms, TM
Malan, AG
Keywords: Free-Surface modelling
Surface capturing
Compressible flow
Fluid dynamcis
Volume-of-Fluid
Fluid dynamics
Fluids
Issue Date: Jun-2011
Publisher: American Institute of Aeronautics and Astronautics
Citation: Heyns, JA, Harms, TM and Malan, AG. 2011. Free-surface modelling technology for compressible and violent flows. 41st AIAA Fluid Dynamics Conference and Exhibit, Honolulu, Hawaii, 27-30 June 2011
Series/Report no.: Workflow request;6749
Abstract: This study presents the development of novel modelling technology for compressible and violent free-surface flows, where the new technology aims to extend the capabilities of existing FSM formulations. For the purpose of this study the volume-of-fluid (VOF) method is extended in two ways: Firstly, we aim to improve on the accuracy of existing free-surface interface capturing schemes, and secondly, a newly developed weakly compressible formulation is introduced. The proposed interface capturing formulation reduces the degree of numerical smearing while maintaining the interface shape. It involves combining the approaches of blended higher-resolution discretisation and adding an artificial compressive term in a manner which retains the strength of each. The weakly compressible formulation proposes an altered governing equation set which accurately accounts for large variance in gas density at low Mach numbers and may be solved at little additional computational cost. All governing equations are discretized via an unstructured edge-based vertex centred finite volume method solved via a parallel implicit solver. The newly developed technology is validated through application to various benchmark test cases.
Description: 41st AIAA Fluid Dynamics Conference and Exhibit, Honolulu, Hawaii, 27-30 June 2011
URI: http://hdl.handle.net/10204/5282
Appears in Collections:Aeronautic systems
Advanced mathematical modelling and simulation
General science, engineering & technology

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