DOI: 10.1007/s11069-020-04234-y
论文题名: A highly flexible laboratory setup to demonstrate granular flow characteristics: With special emphasize on education and science communication
作者: Heinze T.
刊名: Natural Hazards
ISSN: 0921030X
出版年: 2020
卷: 104, 期: 2 起始页码: 1581
结束页码: 1596
语种: 英语
中文关键词: Education
; Granular flow
; Laboratory setup
; Landslides
; Outreach
英文关键词: communication
; education
; granular medium
; image analysis
; laboratory method
; landslide
; science and technology
; sensor
英文摘要: Dynamics of snow avalanches or landslides can be described by rapid granular flow. Experimental investigations of granular flow at laboratory scale are often required to analyze flow behaviour and to develop adequate mathematical and numerical models. Most investigations use image-based analysis, and additional sensors such as pressure gauges are not always possible. Testing various scenarios and parameter variations such as different obstacle shapes and positions as well as basal topography and friction usually requires either the construction of a new laboratory setups for each test or a cumbersome reconstruction. In this work, a highly flexible and modular laboratory setup is presented based on LEGO bricks. The flexibility of the model is demonstrated, and possible extensions for future laboratory tests are outlined. The setup is able to reproduce published laboratory experiments addressing current scientific research topics, such as overflow of a rigid reflector, flow on a bumpy surface and against a rigid wall using standard image-based analysis. This makes the setup applicable for quick scenario testing, e.g. for hypothesis testing or for low-cost testing prior to large-scale experiments, and it can contribute to the validation of external results and to benchmarks of numerical models. Small-scale laboratory setups are also very useful for demonstration purposes such as education and public outreach, both crucial in the context of natural hazards. The presented setup enables variation of parameters such as of slope length, channel width, height and shape, inclination, bed friction, obstacle position and shape, as well as density, composition, amount and grain size of flowing mass. Observable quantities are flow type, flow height, flow path and flow velocity, as well as runout distance, size and shape of the deposited material. Additional sensors allow further quantitative assessments, such as local pressure values. © 2020, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/168521
Appears in Collections: 气候变化与战略
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作者单位: Hydrogeology Department, Institute of Geology, Mineralogy and Geophysics, Ruhr University Bochum, Universitätsstr. 150, Bochum, 44801, Germany
Recommended Citation:
Heinze T.. A highly flexible laboratory setup to demonstrate granular flow characteristics: With special emphasize on education and science communication[J]. Natural Hazards,2020-01-01,104(2)