effect of property variation on the fluid flow and thermal behavior in a vertical channel

Natural convection in a vertical fin array is studied numerically for non-boussineśq and boussineśq fluid with the effect of property variations. simulations are carried out for the specified range: non-dimensional fin spacing = 0.2 to 0.5, non-dimensional clearance = 0.05 to 0.4 and grashof number = 1.86 × 10^5 to 8.64 × 10^5. computations are executed to plot the isotherms contours across the section close to the outlet to exemplify the effect of non-boussineśq fluid in natural convection for variable properties. computation demonstrates a maximum of 9% higher overall nu for fixed property boussineśq fluid than compared to the non-boussineśq fluid. and for the boussineśq fluid with the thermo-physical property maintained constant, the results obtained for local nusselt number is consistently higher than compared to the inconsistent thermo-physical property. also temperature drop close to the tip of the fin is higher at higher gr, indicating higher heat transfer rate. finally, for overall nusselt number a correlation with the governing parametyers for the present investigation is developed.