Acquisition of Advanced Fluid and Particle Dynamics Instrumentation

将购买多普勒风速计（PDA）和数字粒子图像测速（PIV）系统，并配备专用的惠普工作站，以支持四名教授及其学生正在进行的基础和应用研究。测量设备将(1)加强密歇根州立大学研究人员与国内和国际同事的专业互动；(2)从底层流动现象的角度对工艺设备性能提供新的认识；(3)增加验证粘弹性流体多相流模型、湍流闭合理论和流变本构模型所需的知识库。在三年采集期的二维和三维研究中提出的具体研究问题涉及相流、逆流、二次流、流动过渡和非定常流。因此，PDA/PIV系统应该对水力旋流器、汽车冷却风扇、活塞/气缸发动机和反应注射成型过程中遇到的特定流动结构产生新的理解。＊＊＊

9601833 Petty A combined Doppler anemometer (PDA) and digital particle image velocimetry (PIV) system will be purchased with the dedicated HP workstations for supporting the ongoing basic and applied research of four faculty and their students. The measurement facility would (1) enhance the professional interactions of MSU researchers with their national and international colleagues; (2) provide new understanding of process equipment performance in terms of underlying flow phenomenon; and, (3) increase the knowledge base needed to validate multiphase flow models, turbulent closure theories, and rheological constitutive models for viscoelastic fluids. The specific research problems proposed for study during the three-year acquisition period two-and three-dimensional involve the-phase flows, reverse flows, secondary flows, flow transitions, and unsteady flows. Thus, the PDA/PIV system should yield new understanding of specific flow structures encountered in hydrocyclones, in automotive cooling fans, in piston/cylinder engines, and in reaction injection molding processes. ***