Numerical study of turbulent boundary layers with heat transfer and tangential transpiration

Cuhadaroglu B.

INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW, cilt.14, ss.760-782, 2004 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 14
  • Basım Tarihi: 2004
  • Doi Numarası: 10.1108/09615530410544300
  • Dergi Adı: INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.760-782
  • Anahtar Kelimeler: heat transfer, porous materials, boundary layers, numerical analysis, CONCENTRATED WALL SUCTION, NUMBER, FLOWS
  • Karadeniz Teknik Üniversitesi Adresli: Evet

Özet

The hydrodynamic and thermal characteristics of the turbulent boundary layer developed on a porous wall with heat transfer and various angles of transpiration are analyzed numerically with the proper boundary conditions. The wad functions of the viscous and turbulent sub-layers for velocity and temperature are modified to allow for the effect of the angle of injection and suction through the porous wag. The finite difference method based on a control volume approach is used for solving the time averaged Navier-Stokes equations for incompressible flow in conjunction with the standard k-epsilon turbulence model equations. A non-uniform staggered grid arrangement is used. The parameters studied include the suction and injection velocity (V(w)) and the angle (alpha) of the injection and suction. The present numerical results of the normal injection and suction are compared with a known experimental data and a good agreement is obtained. The numerical results also indicate that the characteristics of the turbulent boundary layer such as local friction coefficient and thermal boundary layer thickness are substantially influenced by the velocity and the angle of transpiration.