Fluid flow and heat transfer around circular cylinders in the presence and no-presence of porous media

Layeghi, M ; Sharif University of Technology | 2004

34 Viewed
  1. Type of Document: Article
  2. DOI: 10.1615/JPorMedia.v7.i3.70
  3. Publisher: 2004
  4. Abstract:
  5. Steady-state laminar and incompressible fluid flow and forced-convection heat transfer from a circular cylinder and an array of circular cylinders in the presence and no-presence of porous media are investigated. Various mathematical and numerical models are compared and the effects of porous media on heat transfer enhancement are studied. Navier-Stokes equations are used for the analysis of laminar fluid flow and heat transfer. However, the Darcy and extended Darcy-Brinkman models are used for the analysis of fluid flow and heat transfer in porous media. The cylinders are at constant temperature and the analysis is restricted to the low- and intermediate-Peclet-number regimes (Pr = 1, Re ≤ 40 for a single cylinder and Re ≤ 300 for an array of cylinders), and high Darcy numbers (10-4/4 ≤ Da ≤ 1-2). The governing equations are discretized using the finite-volume approach based on collocated and staggered grids. The first-order upwind and power-law schemes and also the QUICK scheme are used in the numerical solutions. Parametric studies have been done for better understanding of the porous-medium effects on the Nusselt-number distribution, and flow, temperature, and pressure fields around a single cylinder and an array of cylinders. The results are compared with available numerical and experimental data in the literature and show good agreement in all compared cases
  6. Keywords:
  7. Finite element method ; Numerical methods ; Mathematical models ; Heat transfer ; Flow of fluids
  8. Source: Journal of Porous Media ; Volume 7, Issue 3 , 2004 , Pages 239-247 ; 1091028X (ISSN)
  9. URL: https://www.dl.begellhouse.com/journals/49dcde6d4c0809db,17c04de54720d39e,5966590772a4acab.html