Calculs intensifs, visualisation scientifique et transfert haut débit international pour des données d?échelle peta: application à l?écoulement dans les voies supérieure de l?Homme – PetaFlow

It is no falsehood to state that `current society and science attempt to deal with increasing amounts of data?. Today, peta-scale data are commonly gathered as well as generated thanks to the continuous development of measurement technologies and computational resources in diverse fields of science and society. Efficient processing or generation of peta-scale data requires high performance computational (HPC) resources which should be made remotely accessible through long-distance high performance networking and might be represented thanks to interactive scientific visualization. Consequently, generation or processing of peta-scale data benefits from the emergence of adequate `Information and communication technologies (ICT)? with respect to high performance `computing-networking-visualization’ and their mutual `awareness’. In the current proposal, it is aimed to develop and validate such ICT solutions using a transnational high-speed research network between Japan and France connecting GRID5000 (France) to the Naregi (Japan) testbed. Data-transfer protocols are aimed to be validated on data obtained for a real scientific problem involving peta-scale data. Due to the medical relevance as well as basic scientific interest, peta-scale data are obtained from HPC Computational Fluid Dynamics (CFD) simulations on a vector supercomputer (NEC SCX9 Japan) aiming to predict the airflow through the upper airways. In addition, CFD simulation outcome is used as an input for aero-acoustic computations (CAA) for prediction of noise production. High performance computing is needed in particular to predict fricative noise due to the requested accuracy of the flow field (up to 16kHz). The outcome of CFD and CAA simulations will be validated on flow and noise measurements on a suitable experimental setup (France). Besides the international transfer of the generated peta-scale data, scientific visualization of peta-scale data is aimed on a single PC as well as on a tiled display wall for 3D interactive reconstruction of the flow and noise data. In summary, the proposed project aims to contribute to the state-of-the-art of HPC, networking, scientific visualization and their mutual interactions for peta-scale data, while at the same time it is aimed to contribute to basic research in the fields of CFD and CAA applied to flow through the upper airways. The current proposal can only be realized thanks to the joint efforts and resources of the French and Japanese partners involved which gathers specialists in networking, middleware, scientific visualization, HPC and upper airway flow modeling and noise production.