13-08-2012, 01:27 PM
[b]Numerical Predictions of Turbulent Mixed Convection Heat Transfer to Super critical Fluids Using Various Low Reynolds Number k Turbulence Models
Numerical Predictions of Turbulent.pdf (Size: 1,006.12 KB / Downloads: 53)
INTRODUCTION
At supercritical pressures thermodynamic and trans
port properties of uids change dramatically near
the critical temperature Figure shows the typical
variations of the properties of carbon dioxide at super
critical pressure of
MPa For a given supercritical
pressure the temperature at which the uid speci
c
heat capacity is maximum is called the pseudocritical
temperature Because of large property variations
heat transfer rates are dramatically enhanced near the
critical region
In most supercritical uid ows heat transfer
is enhanced near the critical region Under certain
conditions however heat transfer may deteriorate
The buoyancy and ow acceleration eects are con
sidered to be the main causes of the heat transfer
degradation