A Method of Nonstationary Heat Flux Calculation Using the Signal of a Sensor Based on Anisotropic Bismuth Single-Crystal Thermoelements

• Published in: Technical physics letters Vol. 44; no. 4; pp. 316 - 319
• Main Authors: Popov, P. A., Bobashev, S. V., Reznikov, B. I., Sakharov, V. A.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-04-2018; Springer Nature B.V
• Subjects: Bismuth; Classical and Continuum Physics; Heat flux; Heat transfer; Mathematical analysis; Physics; Physics and Astronomy; Single crystals; Thickness ratio
• ISSN: 1063-7850; 1090-6533
• DOI: 10.1134/S1063785018040235

We propose a method for calculating nonstationary heat fluxes using the electric-response signal of a sensor based on anisotropic bismuth single-crystal thermoelements. Using this method, it is possible to approximately calculate the heat flux during a period of time from ∼1 μs to the attainment of a stationary thermal regime. Tests showed that the monitoring of short-term (
t
∼ 1–10 ms) heat fluxes by bismuth-crystal-based sensors with a crystal length to thickness ratio of above 25 ensures a calculation error not exceeding several percent.