Open AccessFlow and heat transfer characteristics downstream of a porous sudden expansion: A numerical study
Author(s) -
Khalid Alammar
Publication year - 2011
Publication title -
thermal science/thermal science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.339
H-Index - 43
eISSN - 2334-7163
pISSN - 0354-9836
DOI - 10.2298/tsci1102389a
Subject(s) - nusselt number , laminar flow , mechanics , heat transfer coefficient , inertia , heat transfer , materials science , compressibility , darcy number , reynolds number , porous medium , thermodynamics , porosity , physics , classical mechanics , turbulence , composite material
Incompressible, axisymmetric laminar flow downstream of a porous expansion is simulated. Effect of the Darcy number and inertia coefficient on flow and heat transfer characteristics downstream of the expansion is investigated. The simulation revealed circulation downstream of the expansion. Decreasing the Darcy number is shown to decrease the circulation region. The Nusselt number, friction coefficient, and pressure drop are shown to increase, while reattachment and location of maximum heat transfer move upstream with decreasing Darcy number. Similar effects are observed with increasing inertia coefficient.