Search results for "Pressure Poisson Equation"

showing 2 items of 2 documents

Inflow/outflow pressure boundary conditions for smoothed particle hydrodynamics simulations of incompressible flows

2017

Abstract Open Boundary treatment is a well-known issue in the Smoothed Particle Hydrodynamics (SPH) method, mainly when the truly Incompressible (ISPH) approach is employed. In the paper a novel method is proposed to set pressure boundary conditions in the computational domain inlets and outlets, without requiring the velocity profile assignment. The new technique allows to treat in the same way inflow and outflow sections, effectively dealing with the release of new particles at inlets and the deactivation of the ones leaving the domain through the outlets. Several 3D numerical tests, both in the laminar and turbulent regimes, are carried out to validate the proposed numerical scheme consi…

General Computer ScienceSPHInflow01 natural sciencesDomain (mathematical analysis)Settore ICAR/01 - Idraulica010305 fluids & plasmasPhysics::Fluid DynamicsSmoothed-particle hydrodynamicsEngineering (all)0103 physical sciencesBoundary value problem0101 mathematicsPressure Poisson EquationPhysicsTurbulenceOpen-boundaryComputer Science (all)General EngineeringLaminar flowMechanicsComputational physics010101 applied mathematicsIncompressible SPHCompressibilityOutflowPressure boundary conditionComputers & Fluids
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SPH modeling of blood flow in cerebral aneurysms

Gli aneurismi cerebrali sono dilatazioni patologiche di arterie cerebrali. Queste patologie hanno un intrinseco rischio di rottura con conseguenti emorragie intracraniche. Sebbene i meccanismi di formazione, crescita e rottura degli aneurismi cerebrali non sono ancora del tutto compresi, è comunemente riconosciuto che in questi processi i fattori emodinamici giocano un ruolo molto importante. Le simulazioni numeriche possono fornire utili informazioni sull'emodinamica e possono essere usate per applicazioni cliniche. Nei tradizionali metodi numerici basati su una griglia di calcolo il processo di discretizzazione dei vasi cerebrali sui quali insiste un aneurisma è molto complesso. D’altra p…

mechanical platelet activationSmoothed particle hydrodynamics (SPH)parallel computingHemodynamicsMulti-blockOpen-boundariescerebral aneurysmsPressure Poisson EquationSettore ICAR/01 - Idraulica
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