ECT Image Analysis Methods for Shear Zone Measurements during Silo Discharging Process

›› 2012, Vol. 20 ›› Issue (2): 337-345.

• SELECTED PAPERS FROM THE 6TH WORLD CONGRESS ON INDUSTRIAL PROCESS TOMOGRAPHY (WCIPT6) • 上一篇下一篇

ECT Image Analysis Methods for Shear Zone Measurements during Silo Discharging Process

Krzysztof Grudzien¹, Zbigniew Chaniecki¹, Andrzej Romanowski¹, Maciej Niedostatkiewicz², Dominik Sankowski¹

1. Computer Engineering Department, Technical University of Lodz, Stefanowskiego 18/22 str, 90-924 Lodz, Poland;
2. Department of Fundamentals of Building and Material Engineering, Gdansk University of Technology, Gdansk, Poland

收稿日期:2011-12-07 修回日期:2012-01-09 出版日期:2012-04-28 发布日期:2012-05-02
通讯作者: Andrzej Romanowski
基金资助:
Supported by the Polish Ministry of Science and Higher Education in 2009-2012 as a research project (3687/B/T02/2009/37)

ECT Image Analysis Methods for Shear Zone Measurements during Silo Discharging Process

Krzysztof Grudzien¹, Zbigniew Chaniecki¹, Andrzej Romanowski¹, Maciej Niedostatkiewicz², Dominik Sankowski¹

1. Computer Engineering Department, Technical University of Lodz, Stefanowskiego 18/22 str, 90-924 Lodz, Poland;
2. Department of Fundamentals of Building and Material Engineering, Gdansk University of Technology, Gdansk, Poland

Received:2011-12-07 Revised:2012-01-09 Online:2012-04-28 Published:2012-05-02
Supported by:
Supported by the Polish Ministry of Science and Higher Education in 2009-2012 as a research project (3687/B/T02/2009/37)

摘要/Abstract

摘要： The paper covers the electrical capacitance tomography (ECT) data analysis on shear zones formed during silo discharging process.This is due to the ECT aptitude for detection of slight changes of material concentration.On the basis of ECT visualisations,wall-adjacent shear zone profiles are analysed for different wall roughness parameters.The analysis on changes of material concentration,based on ECT images,enables the calculation for the characteristic parameters of shear zones-size and material concentration inside the shear zone in a dynamic process of silo discharging.In order to verify the methodology a series of experiments on gravitational flow of bulk solids under various conditions were conducted with different initial granular material packing densities and silo wall roughness.The investigation shows that the increase in container wall roughness is an effective method for reducing the dynamic effects during the material discharging,since these effects are resulted from the resonance between hopper construction and trembling material.Such effects will damage industrial equipment in practical applications and need further investigation.

关键词: electrical capacitance tomography, silo flow, shear zone

Abstract: The paper covers the electrical capacitance tomography (ECT) data analysis on shear zones formed during silo discharging process.This is due to the ECT aptitude for detection of slight changes of material concentration.On the basis of ECT visualisations,wall-adjacent shear zone profiles are analysed for different wall roughness parameters.The analysis on changes of material concentration,based on ECT images,enables the calculation for the characteristic parameters of shear zones-size and material concentration inside the shear zone in a dynamic process of silo discharging.In order to verify the methodology a series of experiments on gravitational flow of bulk solids under various conditions were conducted with different initial granular material packing densities and silo wall roughness.The investigation shows that the increase in container wall roughness is an effective method for reducing the dynamic effects during the material discharging,since these effects are resulted from the resonance between hopper construction and trembling material.Such effects will damage industrial equipment in practical applications and need further investigation.

Key words: electrical capacitance tomography, silo flow, shear zone

Krzysztof Grudzien, Zbigniew Chaniecki, Andrzej Romanowski, Maciej Niedostatkiewicz, Dominik Sankowski. ECT Image Analysis Methods for Shear Zone Measurements during Silo Discharging Process[J]. , 2012, 20(2): 337-345.

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ECT Image Analysis Methods for Shear Zone Measurements during Silo Discharging Process

ECT Image Analysis Methods for Shear Zone Measurements during Silo Discharging Process

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