Hopp til første side 3D Flow Simulation By Sigve Hovda, Ph.D student Three Dimentional Computational Fluid Dynamic Model of the Human Heart During Ejection.

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Presentation transcript:

Hopp til første side 3D Flow Simulation By Sigve Hovda, Ph.D student Three Dimentional Computational Fluid Dynamic Model of the Human Heart During Ejection based on Ultrasound Measurements

Hopp til første side Spline Representation n Spline representation of the first and last volume n Interpolation in time between these volumes n Animation of the mesh

Hopp til første side The mesh n Adaptable n The volume is divided into 6 major blocks n elements which decrease in size as they get closer to the wall

Hopp til første side The CFD simulation n Using a parallel computer, Cray 3E, with 64 processors n Solving the Navier Stokes Equations assuming blood is a Newtonian fluid n Reynolds number of 2500

Hopp til første side Results n Pressure n Velocity (absolute value)

Hopp til første side Compare with Ultrasound n Ultrasound colorflow image - Velocity component in the beam direction - Color codes these components - Spatial and temporal filtering n Simulation - Calculates these velocity components - Same colorcodes n Speed 5% of realtime

Hopp til første side Future Investigation n Better wall describtion n Better initial conditions n Combining ultrasound colorflow data with the CFD model n Using Inverse Boundary Methods