Formation of Linked Ice Layer around Isothermally Cooled Arranged in a Parallel Line with Water Flow : 1st Report, For 60 mm Cylinder Pitch

Abstract

Ice formation phenomena around isothermally cooled cylinders which were arranged in a parallel line with water flow were examined experimentally. Under the conditions of a low Reynolds number and a large cooling temperature ratio, it was shown that the cylinders are linked by an ice layer, and the amount of ice formed around the cylinders is much more than that for a single cylinder. A correlation equation was proposed for the amount of linked ice around cooled cylinders. It was found that the local heat transfer coefficient on the linked ice surface shows periodic changes, decreasing and increasing in the direction of flow ; and the average value of the local Nusselt number has the same characteristic as that on a flat plate in a turbulent flow. A non-dimensional parameter which represents how efficiently the cylinders can work as a thermal energy storage system was introduced.