Numerical solution for laminar unsteady flow about fixed and oscillating cylinders

• Autorzy: Baranyi L. , Shirakashi M.
• Konferencja: International Conference on Numerical Mathematics and Computational Mechanics : NMCM'98 (8 th ; August 1998 ; Miskolc ; Hungary)
• Języki publikacji: EN

Abstrakty

EN

This paper presents a finite-difference solution of two-dimensional, time dependent incompressible Navier-Stokes equations for laminar flow about fixed and oscillating cylinders placed in an otherwise uniform flow. Using boundary fitted coordinates, the equations are transformed to a non-inertial reference frame fixed to the cylinder. The primitive variable formulation is used for the solution of the problem. A special transformation provides a fine grid scale near the cylinder walls and a coarse grid in the far field. Forward difference is used in time, fourth order central difference in space exept for convective terms for which a modified third-order upwind scheme is used. Velocity values are obtained explicitly , and the successive vortex shedding values were compared with experimental results for rigid cylinders and a very good agreement has been obtained. Amplitude bounds of locked-in vortex shedding due to forced crossflow oscilation of a circular cylinder are also determined for Re = 180.

Słowa kluczowe

EN

Navier-Stokes equation; unsteady flow; incompressible flow; bluff body

PL

równanie Naviera-Stokesa; przepływ nieustalony; przepływ nieściśliwy; ciało o kształcie urwistym

• Wydawca: Instytut Podstawowych Problemów Techniki PAN
• Czasopismo: Computer Assisted Mechanics and Engineering Sciences
• Rocznik: 1999
• Tom: Vol. 6, No. 3-4
• Strony: 263--277
• Opis fizyczny: Bibliogr. 15 poz., rys., tab., wykr.

Twórcy

autor

Baranyi L.

autor

Shirakashi M.

• University of Miskolc, Department of Fluid and Heat Engineering, H-3515 Miskolc-Egyetemváros, Hungary