2009 Fiscal Year Final Research Report

Development of the computational method for the multiple fluid flows through the micro channel with a complex shape

Research Project

Project/Area Number	20760123
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Single-year Grants
Research Field	Fluid engineering
Research Institution	The Institute of Physical and Chemical Research
Principal Investigator	OKITA Kohei The Institute of Physical and Chemical Research, 機能情報シミュレーションチーム, 上級研究員 (20401135)
Project Period (FY)	2008 – 2009
Keywords	マイクロ流れ / 混相流 / 数値流体力学 / Diffuse Interface Model / Immersed Boundary Method / 符号付き距離関数
Research Abstract	The immersed boundary method with employing the signed distance function for the shape representation in Cartesian mesh is proposed. The accuracy of the Poiseuille flow, which is dominated by the representation accuracy of the wall boundary condition, is improved by the present method. On the other hand, the free energy model for multiple fluids is proposed based on the diffuse interface method. The three-dimensional contact interfaces at the triple junction is properly represented. Additionally, the gravity driven motion of multiple fluids with the complex deformation of interfaces is reproduced by the three-dimensional computation.