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Numerical study of external flow over ducts with various cross-sections

Maleki, E ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.4028/www.scientific.net/DDF.366.10
  3. Publisher: Trans Tech Publications Ltd
  4. Abstract:
  5. In this article a comprehensive numerical study is performed to compare the effect of fluid flow across a duct with various cross sectional shapes and with different velocities of the flow. Circular, elliptical and rectangular cross sections have been chosen for the ducts and air flows across them with four values of low Reynolds numbers in the range of Re = 1 to Re = 1000. Continuity and momentum equations with proper boundary conditions are solved in two dimensions. Streamlines, pressure distribution and Velocity profiles are obtained and creation of vortices, boundary layers, separation region, wake region, reattachment point and stagnation points are studied in detail and the results are compared for various cases. The value of the Reynolds number which the flow transits from steady to unsteady has been compared for the different cross sectional shapes
  6. Keywords:
  7. Boundary layers ; Ducts ; Geometry ; Laminar flow ; Reynolds number ; Turbulent flow ; Cross-sectional shape ; Cylindrical cross section ; Elliptical cross section ; External flow ; Low Reynolds number ; Rectangular cross-sections ; Separation regions ; Square cross section ; Flow of fluids
  8. Source: Defect and Diffusion Forum ; Volume 366 , 2016 , Pages 10-16 ; 10120386 (ISSN)
  9. URL: https://www.scientific.net/DDF.366.10