NUMERICAL SIMULATION OF LAMINAR AND TURBULENT FLOWS AROUND RECTANGULAR CYLINDERS

By a finite volume method, laminar flows around bluff bodies with a rectangular cross-section of various width-to-height ratios from 0.2 to 10 and with a cross-section of a round leading edge and a square trailing edge have been computed on body-fitted curvilinear co-ordinates at Reynolds number of (1, 4, 7) x 103. Turbulent flows have also been computed by a standard k-epsilon turbulence model. Computed results are compared with experimental data at a Reynolds number of 103 and clearly show the effects of the shape of the bluff body on the aerodynamic characteristics. We can successfully simulate some interesting phenomena whereby the flow pattern changes critically when the side ratio B/H is about 2.1 and 6; that it, a fully separated flow, an alternately reattached one and a stationarily reattached one. The results also reveal interactions between the wake and separation bubbles. There are, however, significant discrepancies between the results from the k-epsilon turbulence model and experiments.

• Supplemental Notes:
  • Intl J Numerical Methods Fluids, v 15 n 9, 15 Nov 1992, p 999 [14 p, 6 ref, 14 fig]
• Authors:
  • Okajima, A
  • UENO, H
  • SAKAI, H
• Publication Date: 1992

Language

• English

Subject/Index Terms

• TRT Terms: Cylindrical bodies; Flow; Laminar flow; Numerical analysis; Turbulence
• Candidate Terms: Turbulent flow
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00716185
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Feb 28 1996 12:00AM