Frazil Ice—Physical and Engineering Aspects

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Crystal Engineering".

Deadline for manuscript submissions: closed (25 August 2021) | Viewed by 5627

Special Issue Editors


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Guest Editor
Faculty of Civil and Environmental Engineering, Gdańsk University of Technology, 80-233 Gdańsk, Poland
Interests: mathematical modeling; river ice; ice load; hydrological modeling; river hydraulics
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Clarkson University, NY, USA

Special Issue Information

Dear Colleagues,

In recent decades, the study of river ice has been significantly advanced, but in changing climatic conditions, ice phenomena are less predictable and more challengeable. Frazil ice and its effect on engineering structures remains one of the major problems in river management. According to the literature, frazil ice forms in supercooled, turbulent water in the shape of small discs of a diameter of 1–4 mm and up to 0.1 mm thickness or needles. Frazil in supercooled water is in the active stage, which means it has the ability to attach to other crystals as well as any underwater objects, including the river bottom or elements of hydroengineering structures. This feature often has an adverse effect on water resource management and may lead to some failures in hydropower plant operation.

The aim of this Special Issue is to collect contributions that discuss methodological and multidisciplinary approaches used to study frazil ice evaluation and its effect on water management.

The following questions have been posed as guideposts for consideration:

  1. How does frazil ice form in natural inland waters and how could it be described in mathematical models?
  2. How is frazil ice evaluated in flowing water and how is it dependent on thermal and flow conditions?
  3. What are the engineering methods used for the mitigation of ice frazil-ice-related problems?

Dr. Tomasz Kolerski
Dr. Fengbin Huang
Guest Editors

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Keywords

  • Frazil ice
  • Frazil formation
  • Frazil deposition
  • Undercover transport
  • Hanging dams

Published Papers (2 papers)

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Research

13 pages, 4492 KiB  
Article
Freeze-Up Ice Jam Formation in the River Bend, a Case Study on the Inner Mongolia Reach of Yellow River
by Shui-Xia Zhao, Wen-Jun Wang, Xiao-Hong Shi, Sheng-Nan Zhao, Ying-Jie Wu, Qiang Quan, Chao Li, Michal Szydlowski, Wei Li and Tomasz Kolerski
Crystals 2021, 11(6), 631; https://doi.org/10.3390/cryst11060631 - 1 Jun 2021
Cited by 4 | Viewed by 2297
Abstract
Concern has been expressed regarding the impacts of climate change on river ice and ice jam formation in cold regions. Ice jams are easily initiated in bends and narrow channels and cause disasters. In this study, observations and remote sensing monitoring are used [...] Read more.
Concern has been expressed regarding the impacts of climate change on river ice and ice jam formation in cold regions. Ice jams are easily initiated in bends and narrow channels and cause disasters. In this study, observations and remote sensing monitoring are used to study the freeze-up ice jam formation of bends. Sediment transport and freezing process of the river interact, influencing bed changes profile and sedimentary budget. River ice processes, channel evolution, ice hydro-thermodynamics, and ice jam accumulation are explored. The results show that the channel topography determines the river thalweg, and that the channel elevation interacts with the river ice through sediment transport. The channel shrinkage increases the probability of ice jam, and the sharp bend is prone to ice jam formation. Under the effect of secondary circulation flow in the bend and in the outer bank, the juxtaposed freeze-up and the hummocky ice cover occur in the same location, and frazil ice accumulates under the junction of the main channel and the shoals. Affected by the increase of the hydraulic slope and the velocity downstream, open water reaches develops downstream of the ice accumulation. An open water section is emerged upstream of the bend, due to the ice deposition, and partly cut-off supply of the frazil. Full article
(This article belongs to the Special Issue Frazil Ice—Physical and Engineering Aspects)
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13 pages, 41239 KiB  
Article
Microstructural Characteristics of Frazil Particles and the Physical Properties of Frazil Ice in the Yellow River, China
by Yaodan Zhang, Zhijun Li, Yuanren Xiu, Chunjiang Li, Baosen Zhang and Yu Deng
Crystals 2021, 11(6), 617; https://doi.org/10.3390/cryst11060617 - 31 May 2021
Cited by 11 | Viewed by 2707
Abstract
Frazil particles, ice crystals or slushy granules that form in turbulent water, change the freezing properties of ice to create “frazil ice”. To understand the microstructural characteristics of these particles and the physical properties of frazil ice in greater depth, an in situ [...] Read more.
Frazil particles, ice crystals or slushy granules that form in turbulent water, change the freezing properties of ice to create “frazil ice”. To understand the microstructural characteristics of these particles and the physical properties of frazil ice in greater depth, an in situ sampler was designed to collect frazil particles in the Yellow River. The ice crystal microstructural characteristics of the frazil particles (morphology, size, air bubble, and sediment) were observed under a microscope, and their nucleation mechanism was analyzed according to its microstructure. The physical properties of frazil ice (ice crystal microstructure, air bubble, ice density, and sediment content) were also observed. The results showed that these microstructures of frazil particles can be divided into four types: granular, dendritic, needle-like, and serrated. The size of the measured frazil particles ranged from 0.1 to 25 mm. Compared with columnar ice, the crystal microstructure of frazil ice is irregular, with a mean crystal diameter less than 5 mm extending in all directions. The crystal grain size and ice density of frazil ice are smaller than columnar ice, but the bubble and sediment content are larger. Full article
(This article belongs to the Special Issue Frazil Ice—Physical and Engineering Aspects)
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