Effect of a missing cylinder on heat transfer and fluid flow in an array of cylinders in cross-flow

Experiments encompassing both heat transfer measurements and flow visualization were performed for cross-flow arrays of cylinders in which there is a missing cylinder. Both staggered and in-line arrays were investigated. The visualization work, carried out with the oil-lampblack technique, yielded highly revealing photographs of the patterns of fluid flow, both for fully populated arrays and for arrays which have a missing cylinder. With regard to heat transfer, it was found that a staggered array is more responsive to a missing cylinder than is an in-line array.