Unsteady Forces on a Body Immersed in a Viscous Fluid. 3rd Report, For an Inclined Thin Elliptic Cylinder

Takahiko Tanahashi, Tatsuo Sawada, Eriya Kanai, Akira Chino, Tsuneyo Ando

Research output: Contribution to journalArticlepeer-review


The flow normal to an infinite thin elliptic cylinder which is uniformly accelerated from rest in a direction perpendicular to its generating lines in a viscous fluid is considered. The Dufort-Frankel method for the vorticity transport equation is used for the numerical simulation of viscous incompressible flows, and a new finite Fourier transform method is introduced in order to handle the stream function equation for accurate and efficient calculation. A major part of the present paper is devoted to physical properties of the flow for the early stages of development of the wake behind the obstacle for Reynolds number 98.11. A computer-aided flow visualization method is used to demonstrate the main features of the hydrodynamic field for the flow. The rest of this paper demonstrates the important unsteady forces such as time-dependent drag, lift and moment acting on the body immersed in a viscous fluid, and presents specific numerical results for various transition.

Original languageEnglish
Pages (from-to)1197-1206
Number of pages10
JournalTransactions of the Japan Society of Mechanical Engineers Series B
Issue number475
Publication statusPublished - 1986
Externally publishedYes


  • Accelerated Flow
  • Elliptic Cylinder
  • Finite Difference Method
  • Flow Visualization
  • Numerical Analysis
  • Unsteady Flow

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering


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