ISSN Online: 2377-424X
ISBN Print: 978-1-56700-474-8
ISBN Online: 978-1-56700-473-1
International Heat Transfer Conference 16
THREE-DIMENSIONAL ANALYSIS OF NON-BOUSSINESQ NATURAL CONVECTION WITH RADIATIVE HEAT TRANSFER IN A VERTICAL SEVEN ROD BUNDLE
Abstract
The present work investigates buoyancy induced cooling of the vertical rods in an enclosure under the influence
of radiative heat transfer using a non-Boussinesq model. The problem consists of seven vertical fuel rods
placed in a cylindrical casing which is typically encountered in the nuclear engineering application. Combined
convective-radiative heat transfer is studied for uniform heated rod bundle housed in an outer cylindrical casing
maintained at a constant temperature. The present study is carried out using an in-house three-dimensional
solver by employing a low-Mach number formulation based on unstructured hybrid grids. Simulations considering
pure natural convection and combined convection with surface radiation is studied. The heat transfer
characteristics concerning temperature distribution inside the enclosure are studied by including the effects of
surface radiation.