Effect of fin spacing on convection in a plate fin and tube heat exchanger Article

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Overview

abstract

• We examine the influence of fin spacing on the over-tube side of a single-row fin-tube heat exchanger through flow visualization and numerical computation. The distance between fins is nondimensionalized by the tube diameter. If this parameter is small, the flow is Hele-Shaw; as it is increased, a horseshoe vortex is formed just upstream of the tube; a separated region is then developed behind the tube; this becomes larger and eventually communicates with the fluid downstream of the heat exchanger. A peak in the Nusselt number occurs at the horseshoe vortex. In the wake region the Nusselt number is very small but increases when there is fluid exchange with that downstream. The ratio of the overall Nusselt number per unit length to the nondimensional pressure drop is found to show a maximum.

authors

• McClain R.L.
• Romero Méndez Ricardo
• Sen M.
• Yang K.T.

publication date

• 1999-01-01

published in

• International Journal of Heat and Mass Transfer  Journal

Research

keywords

• convection; fin; Flow visualization; heat exchanger; Hydrodynamics

Identity

Digital Object Identifier (DOI)

• 10.1016/S0017-9310(99)00120-9

Additional Document Info

start page

• 39

end page

• 51

volume

• 43

issue

• 1