2-Dimensional Numerical Study of Cylindrical Tubes in Crossflows Arranged in Staggered Formation

Abstract

2-dimensional numerical study of cylindrical tubes in crossflows arranged in a staggered formation that aims to investigate the characteristic of thermal and flow of crossflow tubular heat exchangers in staggered arrangements. Prediction of heat transfer and flow around cylinders in tube banks is significant to various engineering aspects. 4 rows of cylindrical tubes with equilateral triangular arrangements were set up with a pitch distance-to-diameter ratio, P/d, between 1.2 to 2.2, respectively. The Reynolds numbers used are between 100 to 50000. In the present study, the coefficient of performance (COP) of the setups was obtained. The Reynolds number of 10000 has the highest value of the coefficient of performance at a pitch distance-to-diameter of 1.2. The highest value of the average Nusselt number goes to the pitch distance-to-diameter ratio of 2.2 at the Reynolds Number of 50000. The value of the average Nusselt number for the pitch distance-to-diameter ratio of 2 is slightly the same as the pitch distance-to-diameter ratio of 2.2. The pitch distance-to-diameter ratio of 2.2 has the highest value than the other pitch-distance-to-diameter ratio of 1.2, 1.5, and 2.