显微粒子成像测速系统(Micro PIV)

采用LaVision的图像采集和处理软件平台DaVis 8.4，图像增强器IRO，四台sCMOS相机，四套长工作距离显微镜和两台激光器，构成了构成了一套层析显微PIV和甲醛平面激光诱导荧光（CH2O PLIF)测量系统，并利用这套系统研究了预混漩涡火焰中的熵输运

采用LaVision公司的DaVis软件，FASTCAM SA3 120K 单色高速相机(Photron,Tokyo, Japan)，1WLED光源，构成一套显微粒子成像测速系统。测量了砂眼蛤蜊悬浮喂养时4mmX4mm视场区域的流动速度矢量场分布。

利用德国LaVision公司的显微粒子成像测速分析软件包DaVis对串联气泡诱导喷射流动导致的细胞膜形变和生物效应进行了实验研究和分析。

采用LaVision公司的DaVis8.2软件平台和两台CCD相机，建立了一套双视角显微层析成像全息流场测量系统。

采用ImagerProX4M相机。长工作距离显微镜。测量一个粗糙的砂轮圆盘在液体池中旋转时所产生的流场。

采用LaVision公司的ImagerSX4M相机，两套Infnity K2, DistaMax型长工作距离显微镜，对3.246mm x 3.874mm的视场进行了流场测量。获得了温度驱动的边界层流动的可视化流场。

Injection processing of composite materials most often includes infiltration of a thermoset resin into a multi-scale porous fabric. Controlling the fluid flow within the multiscale fabric is essential for the quality of the final composite material, since the transport of fluid between regions with different scales plays an important role in phenomena such as void formation and filtration of particle doped resins. In this work, the transient flow behaviour in dual scale porous media is investigated with Micro Particle Image Velocimetry in order to enhance the knowledge and control of the processing of multi-scale composites so that their quality can be improved. Experiments show that the fluid transport between the two scales can be controlled by the injection velocity. Validation of the measured velocity fields furthermore shows excellent agreement with theory.

A stereo-μ-PIV system for the measurement of all three components of the velocity vector in a measurement plane (2D-3C) in a closed microchannel has been developed and first test measurements have been performed on the three-dimensional laminar flow in a T-shaped micromixer. Stereo-μ-PIV measurements in closed microchannels require a calibration based on the self-calibration of the tracer particle images. In order to include the effects of different refractive indices of the water in the microchannel, the glass of the entrance window, and the surrounding air a three-media-model is included in the triangulation procedure of the self calibration. A preliminary test case shows that the stereo-μ-PIV results deviate less than 5% from theoretical values. First measurements in the mixing zone of a T-shaped micromixer show that three-dimensional flow in a microchannel can be resolved, however, the accuracy of the measurements needs to be improved.

This work focuses on the development of efficient computational tools for the simulation of turbulent multiphase polydispersed flows. In terms of methodologies we focus here on the use of Large Eddy Simulation (LES) and Quadrature-Based Methods of Moments (QBMM). In terms of applications the work is finalised, in order to be applied in the future, to particle production processes (precipitation and crystallisation in particular). An important part of the work concerns the study of the flow field in a Confined Impinging Jets Reactor (CIJR), frequently used in particle production processes. The first part is limited to the comparison and analysis of micro Particle Image Velocimetry (μPIV) experiments, carried out in a previous work, and Direct Numerical Simulation (DNS), carried out in this thesis. In particular the effects of boundary and operating conditions are studied and the numerical simulations are used to understand the experimental predictions and demonstrate the importance of unavoidable fluctuations in the experimental inlets.

采用LaVision公司的显微粒子成像测速系统MITAS对双流体低剪切速率微流控系统中红细胞的聚集和对非牛顿血液粘度的影响进行了实验测量研究

采用LaVision的显微粒子成像测速系统，对二尖瓣机械心脏瓣膜铰链区模型的铰链区的流场进行了测量和分析。

Pulsatile flow patterns in an intracranial side-wall aneurysm of a human carotid artery were investigated experimentally using microscopic particle image velocimetry on a flexible wall model. Numerical calculations were performed on a stiff-walled artery with the same geometry and flow conditions. Experimental results showed cyclical vortex formation and decay within the aneurysm. Numerical simulations agreed well with the experimental results and indicate that vortex position and magnitude are due to pulsatile flow conditions rather than wall elasticity. However, the present results suggest that wall compliance plays a role in sustaining the pressure gradients needed for vortex development.