Two series of experiments were conducted to investigate the heat transfer processes from open channel flow to an ice block and an array of ice blocks. The first series of twelve tests were conducted to determine the heat transfer rate from the open channel crossflow to a single isolated ice block. During the experiment the ice block was gradually lowered into the crossflow while maintaining a constant volume of submergence. The ice block which initially had the shape of a circular cylinder, changed gradually to the shape of a cone yielding to the thermal erosion by the crossflow. The heat-transfer rate from the crossflow to the ice cone was greater than the rate to a hemisphere and also the rate to a circular cylinder. This higher heat transfer rate associated with the cone is explained by a 'heat-transfer concentration' phenomenon associated with the tip of the ice cone. / In the second series of experiments, a packed array of ice blocks in the tightest arrangement was used to simulate a brash ice cover in the open channel flow. Six tests were conducted. The heat transfer rate from the open-channel flow to the brash ice cover was significantly higher than the rate to a smooth surface. The increase in heat transfer rate due to the 'roughness effect' was as high as 300 percent. However, due to the 'sheltering effect', the heat transfer rate from the flow to each of the ice cone in the array was only 35 percent of the rate to a single isolated ice cone with the same volume of submergence.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.60689 |
| Date | January 1991 |
| Creators | Wang, Yaohua, 1959- |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Engineering (Department of Civil Engineering and Applied Mechanics.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001271103, proquestno: AAIMM74530, Theses scanned by UMI/ProQuest. |
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