GRK 1567: Lorentz Force Velocimetry and Lorentz Force Eddy Current Testing

铝液和玻璃熔体等高温腐蚀性液体中流速的测量是工业流体力学的重大挑战之一。另一个不同的，尽管物理上密切相关的挑战是检测导电固体材料中的深层次缺陷和不均匀。自2004年以来，伊尔梅瑙理工大学的科学家和工程师一直站在两项新技术开发的前沿，这两项技术被称为洛伦兹力测速和洛伦兹力涡流检测，有望应对这些挑战。这两种技术都是基于测量微小的洛伦兹力，洛伦兹力作用于与移动的液体或固体相互作用的磁体系统。基于Ilmenau在高精度测力、高分辨率流体流动数值模拟和解决磁流体力学逆问题领域的经验，研究培训小组的目标是测量洛伦兹力，其值在1E-11 N到1 N之间，并通过求解反问题来推断流体和固体中所需的参数。为了达到这一目标，我们计划在三个领域进行高精度的实验和数值模拟，即液态金属中的A流测量、电解液中的B流测量和固体材料的C涡流检测。它计划与工业界合作，利用研究成果开发工业原型，这些原型可以在研究培训小组之外进行商业化。本课题非常适合研究培训小组，因为不同的应用领域通过三个方法组相互联系，即MB-磁体系统，KS-力测量系统，以及TS-理论和模拟。该教育方案有三个独特的方面。(1)研究生将获得计算工程领域的专业知识。(2)他们将参与具体项目的国际合作。(3)鼓励研究生与企业密切接触。通过座谈、广泛的访问科学家计划、集思广益会议和定期监测，学生们将能够在三年内完成他们的博士学位。

The measurement of flow velocities in hot and aggressive liquids such as liquid aluminium and molten glass constitutes one of the grand challenges of industrial fluid mechanics. A different, albeit physically closely related challenge is the detection of deeply lying flaws and inhomogeneities in electrically conducting solid materials. Since 2004, scientists and engineers at Ilmenau University of Technology have been at the forefront of the development of two novel techniques, termed Lorentz force velocimetry and Lorentz force eddy current testing, which promise to meet these challenges. Both techniques are based on measuring a minuscule Lorentz force, which acts upon a magnet system interacting with the moving liquid or solid. Based on the experience existing in Ilmenau in the fields of high-precision force measurement, high-resolution numerical simulation of fluid flows and the solving of inverse magnetohydrodynamic problems, the goal of the Research Training Group is to measure the Lorentz forces whose value is between 1e-11 N and 1 N, and to deduce the desired parameters in fluids and solids by solving inverse problems. In order to reach this goal, a symbiotic interaction of high-precision experiments and numerical simulations are planned in three fields, namely A - flow measurement in liquid metals, B - flow measurement in electrolytes, C - eddy current testing of solid materials. It is planned to use the research results in collaboration with industry to develop industrial prototypes, which can be commercialised outside the Research Training Group. The present subject is well suited for a Research Training Group since the different fields of application are connected with each other by three methodological groups, namely MB - magnet systems, KS - force measuring systems, and TS - theory and simulation. The educational programme is characterised by three unique aspects. (1) The graduate students will acquire specialised knowledge in the field of computational engineering. (2) They will be involved in project-specific international collaboration. (3) The graduate students will be encouraged to work in close contact with industry. By virtue of colloquia, an extensive visiting-scientist programme, brainstorming-meetings and regular monitoring, the students will be enabled to complete their PhD within three years.