پديد آورندگان :
Ayani M.B نويسنده , Esfahani J.A نويسنده , Niazrnand H نويسنده , Sousa A.C.M. نويسنده
چكيده لاتين :
The present work is addressed to the numerical study of transient laminar natural convection
in an open space and induced by a line heat source. The governing equations, full NavierStokes
and energy equations with primitive variables, are discretized in a staggered grid by a
control volume approach. The equations for the fluid and solid (line heat source) phases are
solved simultaneously using a segregated technique. Some of the physical and thermo-physical
properties of the fluid (air), such as density, thermal conductivity and viscosity, were considered
to vary with temperature. The results show that the energy equation reaches the steady state
condition more rapidly than the momentum equations. Hence, at that time, the distribution of
temperature does not show any change within the accuracy of the solution, while the distribution
of the velocity still varies. The steady-state results obtained via the time-marching solution show
good agreement with the published steady-state, self-similar results in the vicinity of the centerline
of the plume. Also, the steady-state streamlines compare well with the published experimental
resu Its.
