Liquid-Saturated Granular Material Flows

CTS-9908430M.L.Hunt和C.E.Brennen，加州理工学院将研究液体饱和颗粒流的三个基本方面，总体目的是提高浓悬浮液的可预测性。首先，我们将利用浸没摆来实验研究间隙粘性流体存在下的颗粒-壁面和颗粒-颗粒碰撞。将评估影响雷诺数、固液密度比和颗粒恢复系数的作用。其次，将测量床层和重力流中的颗粒碰撞压力和固体速度波动，并建立适当的关联式。第三，将使用项目前两部分中提出的概念来评估液体中颗粒振动床在加速度和频率变化时的响应。如果研究成功，将有助于更好地理解稠密液-固颗粒系统流动及其在颗粒加工工业和环境中的应用。

AbstractCTS-9908430M.L. Hunt and C.E. Brennen, California Institute of TechnologyThree fundamental aspects of liquid-saturated particle flows, with the overall purpose of improving predictability of concentrated suspensions, will be investigated. First, the particle-wall and particle-particle collisions in the presence of an interstitial viscous fluid will be experimentally studied using an immersed pendulum. The role of the impact Reynolds number, solid-fluid density ratio, and particle restitution coefficients will be evaluated. Second, particle pressure by collisions and solid velocity fluctuations in fluidized bed and gravitational flow will be measured and suitable correlations will be established. Third, the response of vibrated beds of particles in liquids as the acceleration and frequency is varied will be evaluated by using the concepts developed in the first two parts of the project. If successful, the research will lead to better understanding of dense liquid-solid particle system flows with application in particle processing industries and environment.