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

在热的腐蚀性液体中，如液态铝和熔融玻璃中的流速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在导电固体材料中检测深层缺陷和不均匀性。自2004年以来，伊尔梅瑙理工大学的科学家和工程师一直处于两种新技术开发的前沿，称为洛伦兹力测速和洛伦兹力涡流测试，这两种新技术有望应对这些挑战。这两种技术都是基于测量微小的洛伦兹力，它作用于与移动的液体或固体相互作用的磁铁系统。基于伊尔曼瑙在高精度力测量、流体流动的高分辨率数值模拟和反磁流体动力学问题求解方面的经验，研究训练组的目标是测量值在1e- 11n到1n之间的洛伦兹力，并通过求解反问题推导出流体和固体中所需的参数。为此，在a -液态金属流动测量、B -电解质流动测量和C -固体材料涡流测试三个领域，规划了高精度实验与数值模拟的共生互动。它计划与工业界合作使用研究结果来开发工业原型，这些原型可以在研究培训小组之外商业化。本课题非常适合一个研究训练组，因为不同的应用领域通过三个方法组相互连接，即MB -磁铁系统，KS -力测量系统和TS -理论与仿真。教育方案的特点是三个独特的方面。(1)研究生将获得计算机工程领域的专业知识。他们将参与具体项目的国际合作。(3)鼓励研究生从事与行业密切接触的工作。通过学术讨论会、广泛的访问科学家计划、头脑风暴会议和定期监督，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.