Revisit submergence of ice blocks in front of ice cover—an experimental study

Wang, Jun; Wu, Yi-fan; Sui, Jueyi

doi:10.1007/s42241-018-0031-8

Cited by 3 publications

(1 citation statement)

References 14 publications

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“…Considering the drag force and the Venturi pressure effect, the critical Froude number for submergence of an ice block in front of ice cover was studied using the method of the equilibrium of moments [13]. They stated that the longer the ice block, the higher the flow velocity is needed for the entrainment of the ice block in front of the ice cover.…”

Section: Introductionmentioning

confidence: 99%

Criteria for Submergence of Ice Blocks in Front of Ice Cover

Wang¹,

Yang²,

Sui³

et al. 2020

WJET

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During winter, ice jams develop when floating ice blocks accumulate in rivers. Ice jams can dramatically decrease in the capacity of flow in a river and can cause ice flooding due to increase in water level. Submergence of floating ice blocks in front of ice cover is critical for the development of an ice jam. In this study, the effect of the rotation angle of ice blocks on the submergence of ice block was assessed. The impacts of both the drag force caused by the flow and the hydraulic pressure force on the rotation of ice block were studied. Considering both the maximum moment for anti-overturn of an ice block, and the associated rotation angle θ 1 , equations for describing the criteria for ice block entrainment in front of ice cover have been derived. On the basis of the theorem for moment equilibrium, relating the moment acting on a horizontal ice block with the maximum anti-overturn moment of an ice block, the criteria for assessing the overturn-and-submergence of an ice block have been proposed. To verify results using the derived equations for calculating the critical flow velocity for ice block submergence in front of ice cover, data was collected from flume experiments in the laboratory. Experiments have been conducted using different sizes of ice block under different flow conditions in a flume which is 26.68 m long, 0.40 m wide, and 0.6 m deep. Model ice blocks were made of polypropylene and have nearly the same as the mass density of the natural ice. Using proposed method for assessing ice block submergence in front of ice cover, calculated critical flow velocities agree well with those of experiments.

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Section: Introductionmentioning

confidence: 99%