Regensburg 2025 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
AKPIK: Arbeitskreis Physik, moderne Informationstechnologie und Künstliche Intelligenz
AKPIK 5: Poster
AKPIK 5.7: Poster
Donnerstag, 20. März 2025, 15:00–16:30, P2
Measurement of thermal conductivity and thermal diffusivity through spatial and temporal temperature gradients — •Junsheng Zhuo2 and Stephanie Lippmann1,2 — 1Institute of Applied Physics, Friedrich Schiller University Jena, Jena, Thuringia, 07745, Germany — 2Otto Schott Institute of Materials Research, Friedrich Schiller University Jena, Jena, Thuringia, 07743, Germany
To address the challenges of measuring thermal properties of metal, a new device is being developed to measure both thermal conductivity and thermal diffusivity quickly and accurately. The sample is heated directly using an electromagnetic induction furnace, avoiding thermal resistance issues. High-resolution infrared cameras capture temperature distribution with ultra-short time and space intervals, allowing for precise thermal conductivity and diffusivity measurements. Mineral oil is used for cooling, enabling rapid heat transfer. This device calculates temperature-dependent thermal conductivity using spatial temperature gradients and heat flow, based on Fourier's law assisted by fitting, statistics, and machine learning, while thermal diffusivity is derived from real-time transient temperature gradients using the inverse method. Specific heat capacity is then calculated from these two values.
Keywords: thermal conductivity; thermal diffusivity; ill-posed problem; inverse problem; Non-linear problem