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1、Contact Models 接触模型A contact model describes how elements behave when they come into contact with each other. Using the Interaction pulldown menu and + pick-list, you can build a list (stack) of contact models. The top element is applied first, then the next one down and so on. Use the up and down b
2、uttons to move the contact model up and down the list (check the sections below since some models need to be at the start or end of the list). To remove an item, click the x button. Click the preferences button to configure the selected model.（接触模型描述了元素间的接触行为。使用Interaction 下拉列表和 按钮“ +”来添加一系列接触模型。EDE
3、M 优先采用列表中的最前列的接触模型，优先级依次下移。用户可以使用up 和 down 按钮来上下移动列表中接触模型的排列。点击按钮 “X来删除列表中的模型。 点击 Configure 按钮来设置所选中接触模型的参数配置。）Every simulation must have at least one base particle-to-particle and one particle-to-geometry contact model. EDEM is supplied with several integrated contact models; you can also add your
4、own custom plug-in contact models. Refer to the user section of the DEM website and theEDEM Programming Guide for details. （所有仿真必须至少包含一个基础的颗粒-颗粒和颗粒 -几何体接触模型。 EDEM 提供了几个可选的 接触模型，你也可以添加自定义的接触模型插件。更多细节的查询可以到DEM 用户网站查询）Hertz-Mindlin (no slip)（Hertz-Mindlin无滑动接触模型）Hertz-Mindlin (no slip) is the default c
5、ontact model.（EDEM 中默认的接触模型）Interaction相互作用Configurable Parameters参数的设置PositionParticle to ParticleNoneLastParticle to GeometryRecord Relative Wear (On / Off) The Relative Wear model is a way of identifying regions of high impact (normal) and abrasive (tangential) wear on the equipment within a simu
6、lation. It is calculated based on the relative velocity and associated forces between the bulk material and the equipment. This model provides the user with additional data to indicate regions in which wear is taking place. Whilst it provides quantitative values for comparison between two or more de
7、sign iterations, it does not determine an explicit material removal rate. 相对磨损的记录（开/关）相对磨损是一种识别仿真中设备的高冲击（法向）和磨损（切向）区域的方法。 这种方法是基于疏散物料与设备的相关力 和相对速度计算的。 这个接触模型提供用户额外的数据来表征相对磨损发生的区域。与此同时， 这种计算方法提供了两次及两次以上的仿真设计数值的对比，但是并不能精确的计LastInteraction相互作用Configurable Parameters参数的设置Position算材料的损失率。Note: The Relati
8、ve Wear model does not take into account the size of each element so a large variation in mesh sizing might produce unexpected or confusing results. 注意：相对磨损模型不计每个单元的尺寸大小，因此网格尺寸如果变化很大可能会产生不可知和不可控的结果。Hertz-Mindlin (no slip) with RVD Rolling Friction Hertz-Mindlin (no slip) with RVD Rolling Friction ca
9、lculates contact forces in the same way as the Hertz-Mindlin (no slip) model, but offers an alternative implementation of rolling frictions at contacts. Since this model includes Hertz-Mindlin, remove the default no-slip contact model from the list. Hertz-Mindlin(无滑动)滚动摩擦模型 该接触模型计算接触力的方式与赫兹-梅德灵无滑动模型
10、一样,但是在接触中它另外运用了滚动摩擦力。既然该模型包括赫兹-梅德灵模型，在接触列表中就需要移除默认 的Hertz-Mindlin(无滑动)接触模型。InteractionConfigurable ParametersPositionParticle to ParticleNoneLastParticle to GeometryRecord Relative Wear (On / Off), see Hertz-Mindlin LastHertz-Mindlin with Archard Wear艾查德（Archard）磨损-赫兹-梅德灵接触模型Hertz-Mindlin with Archa
11、rd Wear model provides the user with an explicit measurement of material removed from exposed equipment faces due to sliding/abrasive wear during a bulk materials handling process. It is based on the determination of a calibration constant that can be defined through the appropriate material testing
12、. 该接触模型可以提供用户精确的测量在散装物料搬运与输送过程中产生的设备材料损 耗。该模型的计算是基于材料物理实验的校准常数的测定。InteractionConfigurable ParametersPositionParticle to GeometryAssign a Wear Constant value for each geometry section. Record Relative Wear (On / Off), see Hertz-Mindlin LastHertz-Mindlin with Heat Conduction Hertz-Mindlin with Heat Co
13、nduction calculates the heat flux between particles in contact. The model calculates a heat flux based on the particle temperatures and their overlap. This model must be used with Update Temperature particle body force to complete the calculation. The Update Temperature particle body force allows th
14、e inclusion of an external heat source and is where each particle temperature is calculated based on the heat flux calculated in the contact model and a given external heat flux. Make sure the Update Temperature particle body force model is added to the particle body force model. Since this model in
15、cludes Hertz-Mindlin, remove the default no-slip contact model from the list. InteractionConfigurable ParametersPositionParticle to ParticleSet the thermal conductivity for each type of particle.Note the unit depends on the temperature unit; for example, the unit will be W/mK when the temperature un
16、it is kelvin. LastHertz-Mindlin with Bonding（Hertz-Mindlin粘结模型）Hertz-Mindlin with Bonding bonds particles together. Since this model includes Hertz-Mindlin, you should remove the default no-slip contact model from the list. To use, enable the bonding model for both particle-particle and particle-geometry interactions. Although particles cannot be bonded to geometry elements, the bonded model ensures that the particles contact the geometry based on the particles physical radius and
