Particle characterization and separation by a coupled acoustic-gravity field.
Particle characterization and separation by a coupled acoustic-gravity field.
复制标题
通过声重力耦合场进行颗粒表征和分离。
作者：
T. Masudo;T. Okada
提出了一种声-重力耦合场作为颗粒分离和表征的新型外场。当产生驻平面超声波时，颗粒沿着超声力梯度移动到波的节点。如果颗粒也受到沉降力，它们会聚集在平衡位置，在那里这两种力平衡。由介质和颗粒的密度和可压缩性确定的平衡位置表征颗粒。局部超声能量，这是必要的定量讨论，通过使用标准颗粒，其物理参数是明确确定的评估;铝颗粒在本研究中使用。局部超声能量使得确定未知材料的压缩性成为可能。无机和聚合物材料的无孔颗粒，其粒径范围从3到100微米，遵循衍生模型，这表明局部超声能量和衍生模型是有效的。所提出的外场可用于分离具有不同声学性质的颗粒。
A coupled acoustic-gravity field is proposed as a novel external field for particle separation and characterization. When a standing plane ultrasound wave is generated, particles move to the node of the wave along the ultrasound force gradient. If the particles also undergo a sedimentation force, they aggregate at the equilibrium position, where these two forces are balanced. The equilibrium position, which is determined by the density and compressibility of a medium and particles, characterizes the particles. The local ultrasound energy, which is necessary for quantitative discussions, is evaluated by using a standard particle, the physical parameters of which are unambiguously determined; aluminum particles are used in the present study. The local ultrasound energy makes possible the determination of the compressibility of unknown materials. Nonporous particles of inorganic and polymeric materials, the particle sizes of which range from 3 to 100 microm, follow a derived model, suggesting that the local ultrasound energy and a derived model be valid. The proposed external field can be used for separation of particles having different acoustic natures.