{"id":162,"date":"2014-02-16T10:42:51","date_gmt":"2014-02-16T09:42:51","guid":{"rendered":"http:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/?p=162"},"modified":"2019-03-03T11:12:59","modified_gmt":"2019-03-03T10:12:59","slug":"internal-structure-of-inertial-granular-flows","status":"publish","type":"post","link":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/2014\/02\/16\/internal-structure-of-inertial-granular-flows\/","title":{"rendered":"Internal Structure of Inertial Granular Flows"},"content":{"rendered":"<p>Emilien Az\u00e9ma, Farhang Radja\u00ef, PRL 112, 078001 (2014)<\/p>\n<p>&nbsp;<\/p>\n<div id=\"attachment_163\" style=\"width: 207px\" class=\"wp-caption alignleft\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-163\" class=\" wp-image-163\" src=\"http:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-content\/uploadWP\/sites\/18\/2017\/03\/Granular-flow-300x266.jpg\" alt=\"\" width=\"197\" height=\"175\" srcset=\"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-content\/uploads\/sites\/18\/2017\/03\/Granular-flow-300x266.jpg 300w, https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-content\/uploads\/sites\/18\/2017\/03\/Granular-flow-768x681.jpg 768w, https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-content\/uploads\/sites\/18\/2017\/03\/Granular-flow-700x620.jpg 700w, https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-content\/uploads\/sites\/18\/2017\/03\/Granular-flow.jpg 1408w\" sizes=\"auto, (max-width: 197px) 100vw, 197px\" \/><p id=\"caption-attachment-163\" class=\"wp-caption-text\"><br \/>invioletforI\u223c10\u22123 (a),I\u223c0.1(b),I\u223c0.21(c)andI\u223c0.6(d). Black lines represent the connection between particles<\/p><\/div>\n<p>We analyze inertial granular flows and show that, for all values of the inertial number I, the effective friction coefficient \u03bc arises from three different parameters pertaining to the contact network and force transmission: (1) contact anisotropy, (2) force chain anisotropy, and (3) friction mobilization. Our extensive 3D numerical simulations reveal that \u03bc increases with I mainly due to an increasing contact anisotropy and partially by friction mobilization whereas the anisotropy of force chains declines as a result of the destabilizing effect of particle inertia. The contact network undergoes topological transitions, and beyond I \u2243 0.1 the force chains break into clusters immersed in a background \u201csoup\u201d of floating particles. We show that this transition coincides with the divergence of the size of fluidized zones characterized from the local environments of floating particles and a slower increase of \u03bc with I.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Emilien Az\u00e9ma, Farhang Radja\u00ef, PRL 112, 078001 (2014) &nbsp; We analyze inertial granular flows and show that, for all values of the inertial number I, the effective friction coefficient \u03bc arises from three different parameters pertaining to the contact network and force transmission: (1) contact anisotropy, (2) force chain anisotropy, and (3) friction mobilization. Our [&hellip;]<\/p>\n","protected":false},"author":15,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-162","post","type-post","status-publish","format-standard","hentry","category-articles"],"_links":{"self":[{"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/posts\/162","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/comments?post=162"}],"version-history":[{"count":1,"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/posts\/162\/revisions"}],"predecessor-version":[{"id":164,"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/posts\/162\/revisions\/164"}],"wp:attachment":[{"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/media?parent=162"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/categories?post=162"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/tags?post=162"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}