Abstract
This paper investigates the effects of tube arrangement and pitch on the performance of a single row bundle of bare tubes. A transient simulation is conducted to analyze flow and heat transfer characteristics of this problem. Velocity fields obtained from numerical simulation are validated against those obtained using particle image velocimetry in this work. Heat transfer and pressure drop for the flat bundle are found to be in good agreement with available data in the literature. In addition to flat bundles, two cases of inclined bundles, i.e., A and V frames, are investigated. Compared to a flat bundle, while these two cases lead to lower heat transfer rate by about 30% (maximum), the pressure drop of a flat bundle can be higher by about 60%. Finally, a correlation for predicting the drag coefficient as a function of maximum (bundle) velocity is presented.
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