A simple immersed boundary method applied to flows over arbitrary-shaped 3D geometry

Koichiro Mizutani, Satoru Yamamoto

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


A simple computational algorithm for solving flows over an arbitrary-shaped 3D geometry is proposed. This algorithm is based on the Immersed Boundary (IB) Method. A surface mesh for the object is generated by 3DCG software as a set of triangle polygons. A 3D Cartesian grid is used for the flow field. The velocity field near the object is modified by the present IB method along each grid line separately. In this paper, the present method is applied to an incompressible Navier-Stokes solver based on SMAC method using the staggered grid. Some practical flow problems assuming low Reynolds number are calculated and the results are compared with the experimental and the numerical results. Also, the present method is applied to flows over a moving object. Finally, the performance of the simple IB method applied to flows over 3D objects is discussed.

Original languageEnglish
Pages (from-to)1347-1353
Number of pages7
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Issue number6
Publication statusPublished - 2008 Jun


  • Arbitrary-shaped 3D geometry
  • CFD
  • Immersed boundary method
  • Incompressible Flow
  • Moving object
  • Numerical method

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering


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