Search results for " moving boundary"

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Investigation of the hemodynamic flow conditions and blood-induced stresses inside an abdominal aortic aneurysm by means of a SPH numerical model.

2019

The estimation of blood flow-induced loads occurring on the artery wall is affected by uncertainties hidden in the complex interaction of the pulsatile flow, the mechanical parameters of the artery, and the external support conditions. To circumvent these difficulties, a specific tool is developed by combining the aorta displacements measured by an electrocardiogram-gated-computed tomography angiography, with the blood velocity field computed by a smoothed particle hydrodynamics (SPH) numerical model. In the present work, the SPH model has been specifically adapted to the solution of the 3D Navier-Stokes equations inside a domain with boundaries of prescribed motion. Images of the abdominal…

Materials scienceTime FactorsQuantitative Biology::Tissues and OrgansPhysics::Medical PhysicsBiomedical EngineeringPulsatile flowHemodynamicsSettore ICAR/01 - IdraulicaPhysics::Fluid DynamicsAneurysmDiastolemedicine.arterymedicineShear stressPressureHumansComputer SimulationMolecular BiologyAortamedicine.diagnostic_testCardiac cycleApplied MathematicsHemodynamicsModels CardiovascularMechanicsmedicine.diseaseAbdominal aortic aneurysmBiomechanical PhenomenaComputational Theory and MathematicsModeling and SimulationAngiographycardiovascular systemHydrodynamicsStress MechanicalInfrarenal abdominal aorta aneurysm shear stresses arterial wall SPH moving boundarySoftwareAlgorithmsBlood Flow VelocityAortic Aneurysm AbdominalInternational journal for numerical methods in biomedical engineeringREFERENCES
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