Auckland Bioengineering Institute


Computational Fluid Mechanics

c-fluid-mechanics

This group is developing computational and visualisation methods that are particularly relevant for fluid motion inside the human body.

For three dimensional simulations an Arbitrary Langrangian Eulerian (ALE) finite volume method has already been used to predict the heamodynamics of the larger arteries. This method is being extended along with the development of methods to ventricular haemodynamics allowing for fluid - structure interaction. The method is designed to use a block-structured meshing approach so that large "host elements" can represent the overall geometry while permitting to be used for flow modelling.

Flow in an Atriopulmonary Fontan Connection


Patient-specific models of Fontan connections were derived from MRI data and phase encoded MRI data were used to generate unsteady three-dimensional velocity vector fields that provide both input boundary conditions and validation data. The computational solutions were sampled to synthesise the MRI velocity fields thereby providing direct comparisons between computational models and physical measurements. Post-solution calculation of the viscous dissipation function has allowed flow classification according to ways that energy is irreversibly dissipated in a connection and has also been found to be effective for flow interpretation and visualisation. The figure (above) shows complex mixing in the connection. The green iso-surfaces of viscous dissipation show where energy is lost in the boundary layers and where the flow stream collide (arrowed).

Funding partners


The Computational Fluid Mechanics Project gratefully acknowledges the support of its funding partners: