Optimum Arrangement of Rectangular Fins on Horizontal Surfaces for Free-Convection Heat Transfer

Abstract

Experimental average heat-transfer coefficients for free-convection cooling of arrays of isothermal fins on horizontal surfaces over a wider range of spacings than previously available are reported. A simplified correlation is presented and a previously available correlation is questioned. An optimum arrangement for maximum heat transfer and a preliminary design method are suggested, including weight considerations.

Numerical Analysis of Inverted Notched Fin Array Using Natural Convection

“…. In our investigation we find the value of Ra lies in the range of 10 6 . This conforms the flow set up due to density difference is in laminar zone.…”

“…Rayleigh Number remains almost constant with increase in Nusselt Number for constant heat flux. Which gives the value of Rayleigh number gives in the order 10 6 .This shows the flow setup due to variation in density is laminar. The heat transfer coefficient is maximum in case of triangular (In the limit up to 20%) shape notch followed by trapezoidal (In the limit up to 20%) and Rectangular shaped notch (In the limit up to 20%) at constant heat flux due to effective removal of stagnant zone fin area.…”

Natural Convection Heat Transfer from Horizontal Rectangular Fin Arrays

“…In this case, the flow at the middle region of fin arrays is called as up-down flow (or sliding chimney flow). Jones and Smith [17] measured the effect of fin height and spacing on heat transfer coefficient. They found that the most important geometrical variable was fin spacing.…”

Effect of Fin Orientation and Length on the Rayleigh-Benard Convection

“…Refs. [21][22][23] are among the early works which have concentrated on horizontal rectangular fins in configurations heated from the bottom walls. The more recent studies include, for example, Ref.…”