Multiscale Particle-Image-Velocimetry (PIV) system

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The Institute of Food Biotechnology and Food Process Engineering at TU Berlin is subdivided into three research areas: (i) Structure-Process-Functionality, (ii) Food Biotechnology, (iii) Bio Thermo Fluid Dynamics. Bio thermo fluid dynamical systems are characterized by transport processes (mass, momentum, energy) that span a large range of time and length scales. Additionally, these scales are overlapping and influencing each other. Thus, a separated investigation of single scales is not feasible, and mesoscale and multiscale approaches must be applied. The knowledge extraction in the group of the applicant is based on experimental as well as simulative (incl. mathematical-numerical) techniques in single use or in synergetic combination as methodological hybrid. The simulative techniques always need experimental data for modelling as well as for validation. Currently, the group of the applicant is only equipped with one high speed camera (4.000 fps at 1024 x 1024 Pixel). For highly resolved Particle-Image-Velocimetry (PIV) and Particle-Tracking-Velocimetry as well as the application of cameras with higher frame rates and resolution cooperation with other research institutes is necessary. Nevertheless, the implementation of optical measurement techniques in bio thermo fluid dynamical systems demands highly sophisticated user defined coupling and tailor-made solutions. But, in most cases these problem adaptive solutions are not feasible when working with borrowed equipment due to time or equipment-based restrictions. Thus, the proposed multiscale Particle Image Velocimetry system allows to close research gaps by flow visualization and diagnosis. The equipment would be a unique feature of the Institute of Food Biotechnology and Food Process Engineering in the research area of bio thermo fluid dynamics and would enable to gain a pronounced scientific visibility.Bio thermo fluid dynamical systems are characterized by system-based time dependency, pronounced three-dimensional multiscale behavior as well as interactions of multiphysical effects. Thus, the multiscale PIV system features ideal characteristics regarding the demand for the investigation of micro fluidic up to macroscopic systems. The already mentioned requirement of adaptive tailor-made solution for bio thermo fluid dynamic aspects includes not only geometrical coupling to research equipment but also the insurance of biocompatibility of the measurement system (e.g. influence of microorganismic symbiosis by tracer particles), the correction of inherent temperature dependency as well as the exploitation of limits regarding optical access and, thus, the measurement ranges in the case of highly light absorbing media and media with autofluorescence, respectively.