ISSN Online: 2688-7231
ISBN Flash Drive: 978-1-56700-497-7
ISBN Online: 978-1-56700-496-0
Proceedings of the 25th National and 3rd International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC-2019)
Study of Mixed Convection with Surface Radiation in a Ventilated Cavity with Uniform Heat Generating Source
Аннотация
In this work, an exhaustive numerical study have been
presented in two-dimensional, steady, incompressible,
laminar mixed convection with surface radiation in a
ventilated cavity having uniform heat generating source on
the exhaust side. Air is a working fluid and also a radiatively
transparent medium. Navier-stokes and energy equations are
solved using finite-volume based finite difference method
with Boussinesq approximation. For surface radiation
calculation, radiosity-irradiation method is used, while the
view factor required therein are determined using the
Hottel's crossed-string method. The simulation is carried out
for a wide range of Reynolds number (Re = 100-5000) and
corresponding Richardson number (Ri = 0.21-529.73).
Results are presented in the form of streamlines, isotherms,
and maximum temperature, vertical velocity at the midheight
of cavity. Effect of thermal radiation on convective,
radiative and total Nusselt number is shown for different
value of surface emissivity (ε = 0.0-1.0).