Prof. Takahiro Okabe
Graduate School of Science and Technology, Hirosaki University
Date & Time: 11:00 - 12:00, March 10th (Tue), 2026.
Place: 1st Conference Room, Main Bldg. 1F, Sengen.
(The 299th Special CMSM seminar)
Advanced Measurement of Transient Interfacial Thermo-Fluid Phenomena and Emerging Applications
Prof. Takahiro Okabe
Graduate School of Science and Technology, Hirosaki University
Abstract:
In this seminar, I will introduce advanced infrared measurement techniques developed by our laboratory [1] to investigate transient interfacial thermo-fluid phenomena, such as drop impact on heated surfaces [2,3], and discuss their emerging applications in engineering and biomedical fields.
As a representative example, we focus on the impact of ice-particle-laden drops on heated surfaces, a phenomenon relevant to biocompatible cooling technologies [4]. By employing high-speed infrared thermography combined with synchronized visible-light imaging, we achieve simultaneous, time-resolved visualization of both thermal and flow fields during drop impact. This integrated approach enables not only to visualize but also to model the complex interplay among melting, spreading, and interfacial heat transfer.
Building on this measurement framework, we extend the approach to applications in which transient thermal responses are utilized as quantitative information, including spatially resolved visualization of temperature fields in active magnetic regenerator systems for characterizing transient thermal responses induced by magnetocaloric effects. These studies highlight the versatility of transient interfacial measurements as a quantitative platform for both fundamental understanding and emerging functional applications.
References
[1] Okabe et al, International Journal of Heat and Mass Transfer, (2021), 121882.
[2] Okabe et al, Journal of Fluid Science and Technology, (2022), JFST0009.
[3] Saito & Okabe et al, Chemical Engineering Science, (2026), 122503.
[4] Okabe et al, Proceedings of 12th International Conference on Multiphase Flow, (2025), 675.
As a representative example, we focus on the impact of ice-particle-laden drops on heated surfaces, a phenomenon relevant to biocompatible cooling technologies [4]. By employing high-speed infrared thermography combined with synchronized visible-light imaging, we achieve simultaneous, time-resolved visualization of both thermal and flow fields during drop impact. This integrated approach enables not only to visualize but also to model the complex interplay among melting, spreading, and interfacial heat transfer.
Building on this measurement framework, we extend the approach to applications in which transient thermal responses are utilized as quantitative information, including spatially resolved visualization of temperature fields in active magnetic regenerator systems for characterizing transient thermal responses induced by magnetocaloric effects. These studies highlight the versatility of transient interfacial measurements as a quantitative platform for both fundamental understanding and emerging functional applications.
References
[1] Okabe et al, International Journal of Heat and Mass Transfer, (2021), 121882.
[2] Okabe et al, Journal of Fluid Science and Technology, (2022), JFST0009.
[3] Saito & Okabe et al, Chemical Engineering Science, (2026), 122503.
[4] Okabe et al, Proceedings of 12th International Conference on Multiphase Flow, (2025), 675.
(Contact)
Ken-ichi Uchida, Spin Caloritronics Group
E-mail: UCHIDA.Kenichi[at]nims.go.jp
E-mail: UCHIDA.Kenichi[at]nims.go.jp