Parametric study of a spherical head model in fluid-structure interaction

摘要

Impact loading of the head may lead to the damage of the skull-head-cerebrospinal fluid (CSF), either blunt trauma or diffusive trauma. Some recent works have pointed out the importance of some paths flow of the CSF (e.g. Zonga et al. 2006). In a recent work (El Baroudi 2010), attention has turned to a cylindrical head model, which has shown some drawbacks in terms of dynamic response. These observations led us to propose a model more closer to reality, which is not easily achieved experimentally (Hault-Dubrulle 2007). To compare the results with the previous model, we worked at constant volume, that is to say that the geometric and material characteristics were preserved. This allows to set different radii of the different layers. Using the above results, the skull is assumed rigid. Due to the thinness of CSF, we propose to use a viscous coupling associated with the model of Stokes. It is expected to highlight the existence or non-cell Stokes spherical geometry and some particular CSF flows.