ISSN Online: 2377-424X
ISBN Print: 0-85295-345-3
International Heat Transfer Conference 10
WALL FUNCTIONS FOR NUMERICAL SIMULATION OF TURBULENT NATURAL CONVECTION
要約
New wall functions for natural convection have
been derived by means of dimensional analysis
and experimental data. Because only local values
and fluid properties are included, the proposed
wall functions are suitable for numerical
simulation. The validation in natural convection
along a vertical flat plate and in a tall rectangular
cavity shows that the new wall functions provide a
good determination of the wall shear stress and
heat flux. and allow a variation of the size of the
first near-wall grid to be more than an order of
magnitude of the wall distance. Moreover, a certain
analogy of length, velocity, and temperature scales
between natural and forced convection has been found.