A numerical model of translational and rotational momentum transfer of small non-spherical rigid particles in fluid dominated two-phase flows

流体主导的两相流中小非球形刚性颗粒的平动和旋转动量传递的数值模型

• 批准号: 265898722
• 负责人: Professor Dr.-Ing. Paul Steinmann
• 金额: --
• 依托单位: Lehrstuhl für Technische Mechanik (LTM)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2023-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/265898722?language=en
• 关键词: numerical; model; translational; rotational; momentum

The main objective of the project is further development and advanced application of interaction models for numerical simulation of dilute dispersed two-phase flows by the Lagrange-Euler approach, developed in the Phase I. The first part is devoted to advanced validation of the novel shear-induced lift model by means of DNS as well as improvement of the Stokes drag force model on ellipsoids for the case of intermediate or high Knudsen number flow regime, that occurs in the case of micro particles. Furthermore, since advanced application of the developed models for the case of flows in narrow channels (the lung case) is one of the objectives, where interaction with the wall as well as regions with higher particle densities occur, the models for non-spherical particle interaction with the wall will be studied and extended to in-flow particle-particle collision of non-spherical particles. Finally, two complex problems of flows with dispersed non-spherical micro sized particles will be studied. The first is the case of numerical investigation of regional deposition of micro sized glass fibres in the human respiratory airway, and the second is the sedimentation of non-spherical porous particles with inhomogeneous mass distribution in a typical secondary wastewater clarifier.

该项目的主要目标是进一步发展和先进的应用相互作用模型的数值模拟稀分散两相流的拉格朗日-欧拉方法，在第一阶段开发。第一部分致力于先进的验证的新型剪切诱导升力模型的DNS装置以及改进的斯托克斯阻力模型椭球体的情况下，中间或高克努森数的流态，发生在微颗粒的情况下。此外，由于先进的应用程序的情况下，在狭窄的通道（肺的情况下）的流动的发达国家的模型是目标之一，其中与壁的相互作用，以及具有较高的颗粒密度的区域发生，非球形颗粒与壁的相互作用的模型将进行研究，并扩展到在流中的颗粒-颗粒碰撞的非球形颗粒。最后，我们将研究两个复杂的非球形微尺度分散颗粒流动问题。第一个是数值研究的情况下，在人类呼吸道中的区域沉积的微米尺寸的玻璃纤维，第二个是在一个典型的二级污水澄清池中的非球形多孔颗粒与不均匀的质量分布的沉降。