ISSN Online: 2377-424X
ISBN Print: 1-56032-797-9
International Heat Transfer Conference 11
NUMERICAL SIMULATIONS OF 2D STEADY LAMINAR NATURAL CONVECTION FLOWS AROUND ONE OR SEVERAL ENCLOSED THIN PLATES
Resumo
The steady laminar natural convection flow around one or several thin plates in an air-filled enclosure is numeri¬cally examined. The governing unsteady two-dimensional equations expressed in terms of stream function and vorticity are solved using a finite difference method. Numerical simulations are conducted in the case of a thin plate inside a square enclosure. Rayleigh number effects are investigated. For several configurations, typical patterns of streamlines and isothermal lines are examined and the heat transfer from the plate is calculated. The cases of plates at constant temperature and with constant heat flux are computed with different thermal boundary conditions at the enclosure wall. An application with several plates in a small aspect ratio rectangular enclosure is studied. The influence of Rayleigh number and cavity aspect ratio is studied. Different thermal boundary conditions on the plates are applied: plates with constant heat flux on one side, plates with constant heat flux on all sides, isothermal plates. Several cases of thermal boundary conditions of the enclosure walls are considered.