TY - JOUR
ID - 3136
TI - Natural Convection over a Non-Isothermal Vertical Flat Plate in Supercritical Fluids
JO - Scientia Iranica
JA - SCI
LA - en
SN - 1026-3098
AU - Teymourtash, A.R.
AU - Ebrahimi Warkiani, M.
AD - Department of Mechanical Engineering,Ferdowsi University of Mashhad
AD - Department of Engineering,Ferdowsi University of Mashhad
Y1 - 2009
PY - 2009
VL - 16
IS - 6
SP -
EP -
KW - Finite dierence method
KW - Natural convection
KW - Nusselt number
KW - Rayleigh number
KW - Supercritical Fluids
DO -
N2 - In many applications, convection heat transfer is coupled with conduction and radiation
heat transfer, which generate temperature gradients along the walls and may greatly aect natural
convection heat transfer. The main objective of this study is to calculate the heat-transfer characteristics
for natural convection from a non-isothermal vertical
at plate into a supercritical
uid. The in
uence
of the non-uniformity of wall temperature on the heat transfer by natural convection along a vertical
plate, having a linearly distributed temperature (characterized by the slope S) is also investigated.
The thermal expansion coecient is considered as a function of the temperature, the pressure, the
van der Waals constants and the compressibility factor. The trends of the curves obtained with this
equation and with values from tables of thermodynamic properties were similar and diverged at a critical
point. These features conrmed the validity of this equation. Then, the governing systems of partial
dierential equations are solved numerically using the nite dierence method. The local Nusselt number
was then calculated and plotted as a function of the local Rayleigh number. It was observed that a
positive slope of temperature distribution increases the heat transfer rate and a negative slope decreases
it.
UR - http://scientiairanica.sharif.edu/article_3136.html
L1 - http://scientiairanica.sharif.edu/article_3136_fba964f50a64e790a8eaf07f7ab5dab9.pdf
ER -