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La recherche

An answer to the mechanical and process engineering problems of increasing complexity for the XXIst century...

The main objective of the research federation Fed3G is to strengthen its contributions to the development of both knowledge and technology in mechanical and process engineering. The principal scientific issues that will be addressed concern :

  • The integration of more and more refined fundamental mechanisms arising at small scale or even scales, sometimes down to the molecular level, into global behaviour descriptions in order to produce more reliable and versatile predictive tools : this is the multi-scale approach,
  • The development of the connections between mechanics and disciplines such as chemistry and biology, which requires multi-physics approaches, often to be developed in a multi-scale context

Three scientific areas ...

Our research strategy is focused on addressing complex problems that are relevant for important societal issues with the objectives to elaborate advanced reliable simulation tools for engineers and to develop new technologies based on an improved understanding/new knowledge. According to the disciplines and sub-disciplines available within the community (fluid and solid mechanics, process engineering, and soft matter physics), we selected three main progress opportunities :

  • Coupling solid and fluid mechanics. Solid and fluid mechanics simultaneously arise in a variety of situations, and many of these cannot be handled by a single discipline. This is notably so in case of an intimate coupling between the phases (e.g. in very dense systems), or during transitions between solid-like and fluid-like behaviours... As solid and fluid mechanics are represented in Grenoble with first rank laboratories, there is here a unique opportunity for decisive progresses on research subjects which are both difficult to tackle and very important for many applications, notably, but not exclusively, in environmental engineering.
  • Coupling fluid transport and physico/chemical/biochemical transformations. Fluids are widely exploited to transfer mass, heat, energy... and the control of how they flow is often the key to efficiency. Yet, in many circumstances, because of complex dynamic phenomena (turbulence, two-phase flows...) or because of strong couplings with chemical reactions or with biochemical transformations..., the flows cannot be correctly predicted. Key progresses regarding these issues are expected from the association of fluid mechanics with chemical and process engineering which are both investigated over a wide range of scales. These progresses will notably benefit to the development of eco-technologies and clean technologies. In particular, new separation and fractionation processes will be developed in order to comply with the so-called biorefinery concept aiming at preparing new molecules from vegetal biomass. The last approach fits within the global strategy of finding new sources of raw material potentially viable to substitute (or replace in long term) the depleting fossil resources (oil/gas). Another goal concerns the development of efficient and controlled biofiltration.
  • Contributions from mechanics to the understanding of living matter dynamics That axis is dedicated to the investigation of living matter dynamics using the concepts and the methodologies in usage in mechanics (fluid as well as solid) and in soft matter physics. All these disciplines are strongly represented within the partners and their association is expected to lead to a better fundamental understanding of key processes in human biology. The main applications concern here human biology as well as medicine : cell mechanics and motility (cancer, vascular diseases), thrombosis, designing new medical devices or biomaterials...

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