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 TOMOGRA-PHY (WCIPT6) • Previous Articles Next Articles

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:2012-05-02 Published:2012-04-28
Supported by:
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

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)

Abstract

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

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

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.

References

1 Horabik,J.,Schwab,C.V.,Ross,I.J.,“Non-symmetrical loads in a model grain bin during eccentric discharge”,Trans.ASAE,35(3),987-992(1992).
2 Munch-Andersen,J.,Nielsen,J.,“Pressures in slender grain silos. Measurements in three silos of different sizes”,In:2nd European Symposium on the Stress and Strain behaviour of Particulate Solids-Silo Stress,Praha,Czehoslovakia(1990).
3 Zhong,Z.,Ooi,J.,Rotter,J.,“The sensitivity of silo flow and wall stresses to filling method”,Eng.Struct.,23,756-767(2001).
4 Niedostatkiewicz,M.,Tejchman,J.,“Experimental and theoretical studies on resonance dynamic effects during silo flow”,Powder Handl.Process.,15(1),36-42(2003).
5 Wilde,K.,Rucka,M.,Tejchman,J.,“Silo music—Mechanism of dynamic flow and structure interaction”,Powder Technol.,186(2),113-129(2008).
6 Niedostatkiewicz,M.,Tejchman,J.,“Reduction of dynamic effects during granular flow in silos”,Bulk Solids Powder Sci.Technol.,1 (3),51-55(2008).
7 Tejchman,J.,“Dynamic phenomena in model silos”,Internal Report of Institute for Rock and Soil Mechnics,Karlsruhe University,Thailand(1987).
8 Nielsen,J.,Ruckenbrod,C.,“A note on dynamic phenomena in silos”,In:Proc.Int.Conf.:Silos-Forschung und Praxis,Karlsruhe, Thailand,191-209(1988).
9 Tejchman,J.,“Silo-quake—Measurements,a numerical polar approach and a way for its supsion”,Thin Wall.Struct.,31(1-3),137-158(1998).
10 Wensrich,C.,“Experimental behaviour of quaking in tall silos”, Powder Technol.,127,87-94(2002).
11 Muite,B.K.,Quinn,F.S.,Sundaresan,S.,Rao,K.K.,“Silo music and silo quake:Granular flow-induced vibration”,Powder Technol.,145, 190-202(2004).
12 Dhoriyani,M.L.,Jonnalagadda,K.K.,Kandikatla,R.K.,Rao,K.K., “Silo music:Sound emission during the flow of granular materials through tubes”,Powder Technol.,167,55-71(2006).
13 Buick,J.M.,Chavez-Sagarnaga,J.,Zhing,Z.,Ooi,J.Y.,Pankaj, D.M.,Cambell,D.M.,Greated,C.A.,“Investigation of silo-honking: Slip-stick excitation and wall vibration”,J.Eng.Mech.ASCE,131 (3),299-307(2005).
14 Grudzien,K.,Romanowski,A.,Chaniecki,Z.,Niedostatkiewicz,M., Sankowski,D.,“Description of the silo flow and bulk solid pulsation detection using ECT”,Flow Meas.Instr.,21(3),198-206(2010).
15 Chaniecki,Z.,Dyakowski,T.,Niedostatkiewicz,M.,Sankowski,D., “Application of electrical capacitance tomography for bulk solids flow analysis in silos”,Part Part Syst.Char.,23(3-4),306-312(2006).
16 Romanowski,A.,Grudzien,K.,Williams,R.A.,“Analysis and interpretation of hopper flow behaviour using electrical capacitance tomography”,Part Part.Syst.Char.,23(3-4),297-305(2006).
17 Chaniecki,Z.,Sankowski,D.,“Monitoring and diagnosis of dynamics states using process tomography”,In:Diagnostics of Processes and Systems,Korbicz,J.,Patan,K.,Kowal,M.,eds.,Academic Publishing House,Warszawa,Poland 387-394,456(2007).(in Polish)
18 Plaskowski,A.,Beck,MS.,Thorn,R.,Dyakowski,T.,Imaging Industrial Flows:Applications of Electrical Process Tomography,IOP Publishing,Bristol,UK,232(1995).
19 Williams,R.A.,Beck,M.S.,eds.,Process Tomography—Principles, Techniques and Applications,Butterworth-Heinemann,Oxford,UK,507(1995).
20 Yang,W.Q.,Peng,L.,“Image reconstruction algorithms for electrical capacitance tomography”,Meas.Sci.Technol.,14,r1-r14(2003).
21 Lionheart,W.R.B.,“Review:Developments in EIT reconstruction algorithms:Pitfalls,challenges and recent developments”,Physiol. Meas.,25,125-142(2004).
22 Xie,C.G.,Huang,S.M.,Beck,M.S.,Hoyle,B.S.,Thorn,R.,Lenn, C.,Snowden,D.,“Electrical capacitance tomography for flow imaging:System model for development of image reconstruction algorithms and design of primary sensors”,IEE Proc.,G Circuits,Devices and Systems,139(1),89-98(1992).
23 Peng,L.,Yao,D.,Zhang,B.,“Regularization based image reconstruction for electrical capacitance tomography”,In:2nd World Congress on Industrial Process Tomography,Hannover,Germany,144-150(2001).
24 Guo,Z.H.,“New normalization method of imaging data for electrical capacitance tomography”,In:International Conference on Mechatronic Science,Electric Engineering and Computer,Jilin, China,1126-1130(2011).

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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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