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Heat conduction during collisions of cohesive and viscoelastic particles

机译:内聚和粘弹性颗粒碰撞时的热传导

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This paper investigates heat transfer between particles during particle-particle and particle-wall collisions in fluid-solid flows. A model is described, which is based on the work by Sun and Chen (1988) [27], who described heat conduction between elastic, non-cohesive particles. The model of Sun and Chen is, in this work, extended to investigate how cohesion and viscoelasticity, elements that are always present in real systems, of the colliding particles influence the process of heat transfer. This was done by adopting three different soft-sphere models. At the end of the paper dimensional analysis is applied and, by fitting relations between the resulting dimensionless groups to numerical simulations using the models developed, "empirical" relations for the heat transfer during particle-particle and particle-wall collisions are derived. These empirical relations are suitable for use with hard-sphere collision models.
机译:本文研究了流固相流中颗粒间的碰撞以及颗粒与壁之间的碰撞。描述了一个模型,该模型基于Sun和Chen(1988)[27]的工作,他们描述了弹性,非粘性颗粒之间的热传导。在这项工作中,Sun和Chen的模型被扩展为研究碰撞粒子的内聚力和粘弹性(实际系统中始终存在的元素)如何影响传热过程。这是通过采用三种不同的软球模型来完成的。在本文的最后,进行了尺寸分析,并通过使用开发的模型将所得的无量纲组之间的关系拟合到数值模拟中,得出了颗粒-颗粒和颗粒-壁碰撞期间传热的“经验”关系。这些经验关系适用于硬球碰撞模型。

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