NUMERICAL-ANALYSIS ON HEAT-TRANSFER AND FLUID-FLOW FOR ARRAYS OF NONUNIFORM PLATE LENGTH ALIGNED AT ANGLES TO THE FLOW DIRECTION

The periodically fully developed laminar heat transfer and fluid flow of an array of non-uniform plate length, aligned at angles to air flow direction, have been investigated by numerical analysis in the Reynol ds number range from 15 to 410. To implement the periodic boundary con dition in both streamwise and spanwise directions and to confine the c omputation exactly within one cycle, proposes a linear interpolation t echnique, which has been proved successful by comparing the results wi th those obtained in an extended domain. It has been found that with a n increase in the ratio of the long plate length to that of the short plate and with a decrease in the ratio of the transverse pitch to the streamwise cycle length, both the Nusselt number and friction factor d ecrease. Comparison of the numerical results of Nusselt number and fri ction factor with relevant experimental results have been performed. T he agreement should be judged reasonably good.