Pub Date : 2020-12-17DOI: 10.1201/9781003077497-98
F. Chevoir, Michaël Prochnow, P. Moucheront, F. D. Cruz, F. Bertrand, J. Guilbaud, P. Coussot, J. Roux
Dense flows of dry grains in a vertical chute controlled by the orifice consist in a steady and uniform plug flow with a thin shear layer near the rough walls. Using magnetic resonance imaging, we present detailed measurements of velocity profiles, and discuss the influence of the shear rate and of the wall roughness in the shear zone.
{"title":"Dense granular flows in a vertical chute","authors":"F. Chevoir, Michaël Prochnow, P. Moucheront, F. D. Cruz, F. Bertrand, J. Guilbaud, P. Coussot, J. Roux","doi":"10.1201/9781003077497-98","DOIUrl":"https://doi.org/10.1201/9781003077497-98","url":null,"abstract":"Dense flows of dry grains in a vertical chute controlled by the orifice consist in a steady and uniform plug flow with a thin shear layer near the rough walls. Using magnetic resonance imaging, we present detailed measurements of velocity profiles, and discuss the influence of the shear rate and of the wall roughness in the shear zone.","PeriodicalId":166080,"journal":{"name":"Powders and Grains 2001","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129551676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-17DOI: 10.1201/9781003077497-97
C. Chou, M. Li, J. Šmíd, J. Kuo, S. Hsiau
{"title":"Flow patterns and stresses on the wall in a moving granular bed with centric discharge","authors":"C. Chou, M. Li, J. Šmíd, J. Kuo, S. Hsiau","doi":"10.1201/9781003077497-97","DOIUrl":"https://doi.org/10.1201/9781003077497-97","url":null,"abstract":"","PeriodicalId":166080,"journal":{"name":"Powders and Grains 2001","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132517988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-17DOI: 10.1201/9781003077497-129
C. Lesaffre, V. Mineau, D. Picart, H. van Damme
{"title":"Densification Under Vibration of Fully Saturated Granular Packings","authors":"C. Lesaffre, V. Mineau, D. Picart, H. van Damme","doi":"10.1201/9781003077497-129","DOIUrl":"https://doi.org/10.1201/9781003077497-129","url":null,"abstract":"","PeriodicalId":166080,"journal":{"name":"Powders and Grains 2001","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131230134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-17DOI: 10.1201/9781003077497-48
L. Rothenburg, N. P. Kruyt
{"title":"On limitations of the uniform strain assumption in micromechanics of granular materials","authors":"L. Rothenburg, N. P. Kruyt","doi":"10.1201/9781003077497-48","DOIUrl":"https://doi.org/10.1201/9781003077497-48","url":null,"abstract":"","PeriodicalId":166080,"journal":{"name":"Powders and Grains 2001","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122858365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-17DOI: 10.1201/9781003077497-66
M. Miyata, T. Sugano, G. Mustoe, M. Nakagawa, T. Tanaka
{"title":"Study on the Force Support System within a Rubble Rock Foundation using Discrete Element Method","authors":"M. Miyata, T. Sugano, G. Mustoe, M. Nakagawa, T. Tanaka","doi":"10.1201/9781003077497-66","DOIUrl":"https://doi.org/10.1201/9781003077497-66","url":null,"abstract":"","PeriodicalId":166080,"journal":{"name":"Powders and Grains 2001","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124055135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We present experimental results concerning the compaction of a granular assembly of glass spheres under periodic shear deformation. Results for a monodisperse set of spheres and a bidisperse set of spheres are presented
我们提出了关于在周期性剪切变形下玻璃球颗粒组合压实的实验结果。给出了单分散球组和双分散球组的结果
{"title":"Compaction of a packing of hard spheres under horizontal shear","authors":"M. Nicolas, P. Duru, O. Pouliquen","doi":"10.1201/9781003077497-6","DOIUrl":"https://doi.org/10.1201/9781003077497-6","url":null,"abstract":"We present experimental results concerning the compaction of a granular assembly of glass spheres under periodic shear deformation. Results for a monodisperse set of spheres and a bidisperse set of spheres are presented","PeriodicalId":166080,"journal":{"name":"Powders and Grains 2001","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132939852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-17DOI: 10.1201/9781003077497-106
W. Chen, K. Lu, Zh Jiang, M. Hou, L. Lam
A local horizontal electric field is able to retard the flow of nickel granule down a vertical pipe. In the first sequence of our experiments, the granule is released from a hopper after a voltage difference V is applied across two short, vertical copper electrodes. As V is increased from zero to 4.8 kV, Q remains practically constant for V V I, In the second sequence of our experiments, V is first set at 4.8 kV; the flow is allowed to start; then V is reduced to the desired voltage. The new Q vs. V curve coincides with the previous Q(V) curve of first sequence, except for V-2 < V < V-1. A simplified one-dimension model is able to explain all the observed features.
一个局部的水平电场可以延缓镍颗粒沿垂直管道的流动。在我们实验的第一个序列中，在两个短的垂直铜电极上施加电压差V后，颗粒从料斗中释放出来。当V从零增加到4.8 kV时，V V I的Q几乎保持不变。在我们的实验的第二个序列中，V首先被设置为4.8 kV;允许流量启动;然后V被降低到所需的电压。除了V-2 < V < V-1外，新的Q vs. V曲线与前一个序列的Q(V)曲线一致。一个简化的一维模型能够解释所有观测到的特征。
{"title":"Electric-field induced retardation of granular flows in a pipe","authors":"W. Chen, K. Lu, Zh Jiang, M. Hou, L. Lam","doi":"10.1201/9781003077497-106","DOIUrl":"https://doi.org/10.1201/9781003077497-106","url":null,"abstract":"A local horizontal electric field is able to retard the flow of nickel granule down a vertical pipe. In the first sequence of our experiments, the granule is released from a hopper after a voltage difference V is applied across two short, vertical copper electrodes. As V is increased from zero to 4.8 kV, Q remains practically constant for V V I, In the second sequence of our experiments, V is first set at 4.8 kV; the flow is allowed to start; then V is reduced to the desired voltage. The new Q vs. V curve coincides with the previous Q(V) curve of first sequence, except for V-2 < V < V-1. A simplified one-dimension model is able to explain all the observed features.","PeriodicalId":166080,"journal":{"name":"Powders and Grains 2001","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133249504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-17DOI: 10.1201/9781003077497-80
C. Claquin, F. Emeriault
{"title":"Interface behavior of granular materials: discrete numerical simulation and statistical homogenization","authors":"C. Claquin, F. Emeriault","doi":"10.1201/9781003077497-80","DOIUrl":"https://doi.org/10.1201/9781003077497-80","url":null,"abstract":"","PeriodicalId":166080,"journal":{"name":"Powders and Grains 2001","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115331878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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