PREDICTIVE STUDY OF LAMINAR NATURAL CONVECTION IN SUPERCRITICAL FLUID ALONG VERTICAL FLAT PLATE Space

Abstract

The laminar natural convection in supercritical fluid along vertical flat plate with uniform heat flux was simulated in the present work. The governing equations of partial differential  equations  were solved  numerically  using  the  finite  difference  method. The thermo-physical  properties calculation  was based  on  a  Van  der  Waals  equation  of  state.  The velocity  and  temperature  profiles  were  solved  with  a FORTRAN code. HydrofluorocarbonsR134a, R1234yf and R404a were used as working fluids. Thermal expansively  at  a  reduced  pressure  and  reduced  temperature  near  critical  point  (Pr  and  Tr  =  1.05,  1.1) showed sharp variation. The local Nusselt number as a function of the local Rayleigh number was plotted. The curve trend illustrates that  the  Nusselt  number  decreases  as  the  reduced  pressure  and  reduced temperature increases. The corresponding curves of supercritical conditions depict the same shape of the corresponding line of classic correlation.The velocity and temperature developing along the vertical plate was plotted and contour lines explained the fluid behavior above supercritical conditions.