Development of rheological and internal structure measurement methods for complex fluids in unsteady and non-uniform strain rate fields

2023 Fiscal Year Final Research Report

• Project/Area Number: 22K18766
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 19:Fluid engineering, thermal engineering, and related fields
• Research Institution: Tokyo University of Agriculture and Technology
• Principal Investigator: Kameda Masaharu 東京農工大学, 工学(系)研究科(研究院), 教授 (70262243)
• Co-Investigator(Kenkyū-buntansha): 伊藤 輝将 東京農工大学, 工学(系)研究科(研究院), 准教授 (60783371) ; 武藤 真和 名古屋工業大学, 工学(系)研究科(研究院), 助教 (30840615)
• Project Period (FY): 2022-06-30 – 2024-03-31
• Keywords: 流体工学 / 計測工学 / レオロジー / 光計測

Outline of Final Research Achievements

We have developed a new time-resolved rheological measurement system that combines flow measurement by Doppler optical coherence tomography (Doppler-OCT) and material and molecular measurement by coherent anti-Stokes Raman spectroscopy (CARS). A new single-pass narrow-band second harmonic generation (SHG) method using optical filter pulse shaping was successfully developed as an element of the CARS method. Although simultaneous measurement was not achieved, the basic characteristics of each system were confirmed, and a prospect for the realization of complex fluid measurement in the future was established.

Free Research Field

流体工学

Academic Significance and Societal Importance of the Research Achievements

レオロジーは，流体が流動にともなってどのような変形を起こし，どのような力を生じるのかを知るための学問です．食品，日用品，塗料，血流などの複雑流体（complex fluids）のレオロジーは，工業プロセスにおける混合器，配管，ポンプなどの流動に大きな影響を及ぼします．本研究では，流動の急激な変化や管内での複雑流体の内部構造と流速を同時に測るシステムの開発を進めました．工業プロセスのその場計測は，製造工程の改善に大いに役立ちます．