Numerical prediction of periodically developed fluid flow and heat transfer characteristics in the sinusoid wavy fin‐and‐tube heat exchanger
International Journal of Numerical Methods for Heat & Fluid Flow
ISSN: 0961-5539
Article publication date: 12 June 2009
Abstract
Purpose
In this paper three‐dimensional numerical simulations were conducted for the periodically developed laminar flow in the sinusoid wavy fin‐and‐tube heat exchanger.
Design/methodology/approach
A novel CLEARER algorithm is adopted to guarantee the fully coupling between the pressure and velocity, and it can not only speed up the convergence rate, but also overcome the severe grid non‐orthogonality in the wavy fin‐and‐tube heat exchanger. The influence of wave amplitude, fin pitch, tube diameter and wave density on fluid flow and heat transfer characteristics is analyzed under different Reynolds numbers.
Findings
The numerical results show that with the increase of wave amplitude, tube diameter or wave density, both the friction factor and Nusselt number will increase, and the increase rate of friction factor is higher than that of Nusselt number. It is interesting to note that, at low Reynolds numbers the Nusselt number increases with the decrease of fin pitch, while at high Reynolds numbers, the Nusselt number increases with the increase of fin pitch.
Originality/value
The numerical results presented in this paper may provide some useful guidance in the design of the wavy fin‐and‐tube heat exchanger with large number of rows of tubes.
Keywords
Citation
Cheng, Y.P., Lee, T.S. and Low, H.T. (2009), "Numerical prediction of periodically developed fluid flow and heat transfer characteristics in the sinusoid wavy fin‐and‐tube heat exchanger", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 19 No. 6, pp. 728-744. https://doi.org/10.1108/09615530910972986
Publisher
:Emerald Group Publishing Limited
Copyright © 2009, Emerald Group Publishing Limited