Development of a numerical tool to deal with complex fluid/structure interactions: applications in energy efficiency, biomechanics and marine propulsion

开发处理复杂流体/结构相互作用的数值工具：在能源效率、生物力学和船舶推进方面的应用

• 批准号: RGPIN-2015-06512
• 负责人: Poncet, Sébastien
• 金额: $ 1.82万
• 依托单位: Université de Sherbrooke
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=680480
• 关键词: Development; numerical; tool; deal; complex

The long-term objective of this research program is to develop a new numerical CFD (Computational Fluid Dynamics) tool to investigate complex flow systems involving fluid/structure interactions. It will be then applied to four concrete situations in the fields of energy efficiency, biomechanics and marine propulsion.***In various situations, one may find a solid body moving in a superimposed fluid flow. The solid body motion may be prescribed (« one-way coupling ») or induced by the fluid flow (« two-way coupling »).***In 2014, the development of an in-house numerical tool based on the Lattice Boltzmann method and coupled to an immersed boundary method to take into account the solid body motion has been initiated. This kind of coupled approach has many advantages: adaptative mesh grids are not required, the accuracy of the spatial numerical schemes is preserved even at the walls and the introduction of new physical effects is achieved easily by changing viscosity and/or by adding external body forces in the Boltzmann equation. The present version of the code enables to simulate flow configurations including a solid body with an imposed motion in a two-phase stratified fluid medium with slightly different densities and for arbitrary (de)wetting conditions.***In the next five years, my research program will focus on numerical developments of the CFD tool to simulate more realistic flow configurations, including: non-Newtonian fluids, turbulence, "two-way coupling" for the fluid/structure interaction, poro-elastic walls and effect of a magnetic field. This new CFD tool will be applied to three strategic research fields in mechanical engineering:***1/ in energy efficiency for the optimization of two refrigeration systems: a porous regenerator used in magnetic refrigeration and a system generator/storage tank for ice slurries.****2/ in biomechanics to study the transport of bronchial mucus in the human respiratory system by the synchronyzed beating of cilia at the epithelium surface.****3/ in marine propulsion by the use of Flettner rotors. These are high rotating cylinders using the Magnus effect to induce a streamwise power enabling to save about 25% of the total energy required for ship propulsion.***This code will be the first to allow the simulation of the fluid/structure interactions in such complex situations while preserving the accuracy of the results on the moving walls. In addition to the four applications covered by the program, this unique tool will open the door with many other applications: the geometrical optimization of water and wind turbines, the propulsion by ciliary motion of marine animals and the transport of the red cells among other things. Six highly qualified personnel implied not only in the numerical developments but also in the real applications developed at the partners, will be trained during the program.***

该研究计划的长期目标是开发一种新的数值CFD（计算流体动力学）工具来研究涉及流体/结构相互作用的复杂流动系统。然后将其应用于能源效率，生物力学和海洋推进领域的四种混凝土情况。可以规定固体运动（«单向耦合»），也可以由流体流动（«双向耦合»）引起。这种耦合方法具有许多优势：不需要自适应网格网格，即使在墙壁上也可以保留空间数值方案的准确性，并且通过更改粘度和/或通过在玻尔兹曼方程中添加外部身体力来轻松实现新的物理效果。该代码的当前版本能够模拟流动配置，包括具有固体运动的固体，具有稍微不同的密度略有不同的两相分层的流体培养基，以及任意（DE）润湿条件。相互作用，毛孔弹性壁和磁场的影响。该新的CFD工具将应用于机械工程中的三个战略研究领域：*** 1/在优化两个制冷系统的能源效率上：一种用于磁性冷藏的多孔再生器和用于冰浆的系统生成器/储罐。上皮表面。**** 3/在海洋推进中，通过使用弗莱特纳转子。这些是使用Magnus效应的高旋转缸，以诱导流向功率，以节省船舶推进所需的总能量的25％。除了该程序所涵盖的四个应用程序外，该独特的工具还将使用许多其他应用打开门：水和风力涡轮机的几何优化，海洋动物的纤毛运动推进以及红细胞的运输等。六名高素质的人员不仅在数字发展中暗示，而且在合作伙伴开发的实际应用中也暗示了该计划期间的培训。*** ***