- Title
- The investigation of arch model acting in mass-flow hoppers
- Creator
- Guo, Jie; Roberts, Alan W.; Prigge, Jan-Dirk
- Relation
- 9th International Conference on Measurement and Control of Granular Materials (MCGM' 2011). Proceedings of the 9th International Conference on Measurement and Control of Granular Materials [presented in Advanced Materials Research, Vol. 508] (Shanghai, China 27-29 October, 2011) p. 135-140
- Publisher Link
- http://dx.doi.org/10.4028/www.scientific.net/AMR.508.135
- Publisher
- Trans Tech Publications
- Resource Type
- conference paper
- Date
- 2012
- Description
- This paper presents the experimental results of mass-flow hopper arch geometry investigation, which was conducted using a variable geometry plane-flow bin. The cohesive arches formed under different critical outlet openings and hopper half-angles were measured using a 360° two-dimensional laser line scan system. This system was employed to obtain the complete surface profile of each arch across the width of the outlet by moving the rotating laser along the total length of the outlet. The test results were analyzed using Matlab, adopting stationary wavelet transformation de-noising to decrease the signal noise generated during the testing process. The geometric data for each single line scan was smoothed and combined to present a three-dimensional arch surface profile shown to be in good agreement with the observed experimental arch profiles. The angle η at the intersection of the arch with the hopper walls was then calculated by running a Matlab program and a new angle η' is introduced to the arch shape study. The detailed results are discussed in the paper. Arch geometry models, such as the parabolic arc and circular arc arch models developed, respectively, by Walker [1] and Enstad [2] are reviewed and their relevance is discussed based on the experimental results presented in this paper.
- Subject
- cohesive arch shape; variable geometry hopper; plane-flow silo; three-dimensional surface profile; laser rangefinder
- Identifier
- http://hdl.handle.net/1959.13/1340765
- Identifier
- uon:28568
- Identifier
- ISBN:9783037854082
- Language
- eng
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