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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) FULL PAPERS : THEME 8- SPECIAL SESSIONS : PRESSURE OUTFLOW BOUNDARIES FOR SPH AND COUPLING SPH TO FINITE VOLUME METHODS
PRESSURE OUTFLOW BOUNDARIES FOR SPH AND COUPLING SPH TO FINITE VOLUME METHODS
Author : PAUL H.L. GROENENBOOM, ANDREY MEZENTSEV
Smoothed Particle Hydrodynamics (SPH) is a method well suited to simulate dynamic flow when moving interfaces or free surfaces are present [1,2]. In contrast, the finite volume (FV) method may be the best choice for (viscous) flow with boundary layers but without interfaces [3]. Hence, it would be beneficial to couple SPH and FV. Since SPH is a Lagrangean approach, linking it to the Eulerian FV method yields a serious algorithmic and software engineering challenge. A first step for coupling is to transfer fluid from the SPH domain to the FV model. This requires development of an outflow algorithm for holes in the boundary of SPH domains against a non-constant pressure field as well as the transfer of flow data from moving SPH outflow openings to a fixed FV inflow surface. Since SPH does not know the concept of faces, numerical algorithms have been developed to evaluate the pressure force acting on the outflow area and to distribute this force over relevant particles. The orifice geometry is updated during the simulation in order to account for wall motion resulting from fluid-structure interaction [4]. Particles inside the reservoir in the proximity of the orifice will get a part of the force. Examples are outflow from a large container into pipes or blood flow from the left

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Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) FULL PAPERS
Article : THEME 8- SPECIAL SESSIONS
Date Published : 20/04/2016
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