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首页> 外文期刊>Geophysical Research Letters >Collapse of Granular Columns With Fractal Particle Size Distribution: Implications for Understanding the Role of Small Particles in Granular Flows
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Collapse of Granular Columns With Fractal Particle Size Distribution: Implications for Understanding the Role of Small Particles in Granular Flows

机译：颗粒色谱柱与分形粒度分布的倒塌：对理解小颗粒在粒状流动中的作用的影响

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Abstract >According to field measurements, the basic character of the particle size distributions obtained from the landslide accumulations is fractal. The collapse of the granular columns with fractal particle size distribution (FPSD) is performed numerically and experimentally to form dry granular flows and the mechanism of how FPSD affects the particle movements is then investigated. Numerical and experimental analyses show that particle flow mobility increases as the fractal dimension increases. Several linear relationships exist between the fractal dimension and flow mobility parameters. By analyzing the kinetics of granular flows, it is found that a large number of small‐sized particles will form a boundary layer where the particle shearing and velocities are remarkably increased and will thus have a lubricant effect on the flow mobility. Moreover, the number of particle collisions increases, and small‐sized particles are more likely to obtain higher spreading velocities via the greater contribution of particle interactions. </abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><抽象类型=“主要”的xml：郎=“EN”> <标题类型=“主”>抽象</ TITLE> <P>据现场测量，从滑坡堆积得到的粒度分布的基本特征是分形。被数值模拟和实验进行的粒状列的分形粒度分布的崩溃（FPSD），以形成干燥颗粒流和然后的FPSD如何影响的粒子移动的机构进行了研究。数值模拟和实验分析表明，颗粒流迁移率随着所述分形维数的增加。几个线性关系的分形维数和流移动性参数之间存在。通过分析颗粒流动的动力学，发现了大量的小尺寸的颗粒将形成边界层其中颗粒剪切和速度被显着地增加，因此将对流移动性的润滑剂的效果。此外，粒子碰撞的增加小尺寸的颗粒的数量，并且更容易得到更高经由粒子相互作用的更大的贡献扩展速度。</ p> </抽象> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" >著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-23539/'>《Geophysical Research Letters》</a> <b style="margin: 0 2px;">|</b><span>2017年第24期</span><b style="margin: 0 2px;">|</b><span>共9页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Lai Zhiqiang&option=202" target="_blank" rel="nofollow">Lai Zhiqiang;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Vallejo Luis E.&option=202" target="_blank" rel="nofollow">Vallejo Luis E.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Zhou Wei&option=202" target="_blank" rel="nofollow">Zhou Wei;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Ma Gang&option=202" target="_blank" rel="nofollow">Ma Gang;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Espitia Jairo M.&option=202" target="_blank" rel="nofollow">Espitia Jairo M.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Caicedo Bernardo&option=202" target="_blank" rel="nofollow">Caicedo Bernardo;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Chang Xiaolin&option=202" target="_blank" rel="nofollow">Chang Xiaolin;</a> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> <p>State Key Laboratory of Water Resources and Hydropower Engineering ScienceWuhan UniversityWuhan China;</p> <p>Department of Civil and Environmental EngineeringUniversity of PittsburghPittsburgh PA USA;</p> <p>State Key Laboratory of Water Resources and Hydropower Engineering ScienceWuhan UniversityWuhan China;</p> <p>State Key Laboratory of Water Resources and Hydropower Engineering ScienceWuhan UniversityWuhan China;</p> <p>Department of Mining EngineeringUniversidad Pedagogica y Tecnologica de ColombiaSogamoso Colombia;</p> <p>Departamento de Ingenieria CivilUniversidad de los AndesBogota Colombia;</p> <p>State Key Laboratory of Water Resources and Hydropower Engineering ScienceWuhan UniversityWuhan China;</p> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li > <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span><a href="https://www.zhangqiaokeyan.com/clc/163.html" title="地球物理学">地球物理学;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=granular column collapse&option=203" rel="nofollow">granular column collapse;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=fractal particle size distribution&option=203" rel="nofollow">fractal particle size distribution;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=granular flows&option=203" rel="nofollow">granular flows;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=discrete element method&option=203" rel="nofollow">discrete element method;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=flow regime&option=203" rel="nofollow">flow regime;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=flow mobility&option=203" rel="nofollow">flow mobility;</a> </p> <div class="translation"> 机译：颗粒柱塌陷;分形粒度分布;颗粒状流动;离散元素法;流动制度;流动性; 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