SIMULATIONS IN LUNGS MODELS
Movies of air circulation simulations through lung models can be downloaded by clicking on images. Movies are compressed with MPEG.
Simulations in a two generations symmetric tree, with a sinusoidal model of respiration (5 seconds period). Inlet Reynolds number is 1200.
Simulations in the first three generations of Hiroko Kitaoka's lung model, with a realistic model of respiration (2 seconds inspiration and 3 seconds expiration). Respiratory regime is considered at rest.
Simulations of Stokes flow in a respiratory 2D acinus (model by H. Kitaoka)
With a personnal code for Stokes solving :
With Comsol Multiphysics, in a larger structure :
Research of the optimal shape of a bifurcation crossed by Stokes flow (in collaboration with Y. Privat)
The optimal shape minimizes the dissipated energy and has a volume constrained. We use shape derivatives along with Uzawa algorithm implemented in Comsol Multiphysics. A movie that represents the different steps of the algorithm is available when clicking on the images (13 Mo & 3 Mo).
Lungs morphogenesis.
This work has been made in collaboration with P. Blanc, R. Clément and S. Douady.
Study of mechanical pressure in the lung parenchyma of a mouse foetus (3D reconstruction) and growth modelling
The colors represents the level sets of the pressure (normalized).
Modelling of tree growth.
Example 1:
Example 2: