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3D Flow SimulationBy Sigve Hovda, Ph.D student

Three Dimentional Computational Fluid Dynamic Model of the Human Heart

During Ejection based on Ultrasound Measurements

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Spline Representation Spline representation of the first and last volume Interpolation in time between these volumes Animation of the mesh

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The mesh Adaptable The volume is divided into 6 major blocks 210 000 elements which decrease in size as they

get closer to the wall

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The CFD simulation Using a parallel computer, Cray 3E, with 64

processors Solving the Navier Stokes Equations assuming

blood is a Newtonian fluid Reynolds number of 2500

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Results Pressure Velocity (absolute value)

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Compare with Ultrasound

Ultrasound colorflow image- Velocity component in the beam direction- Color codes these components- Spatial and temporal filtering

Simulation- Calculates these velocity components- Same colorcodes

Speed 5% of realtime

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Future Investigation Better wall describtion Better initial conditions Combining ultrasound colorflow data with the CFD

model Using Inverse Boundary Methods