16:10   Novel experimental measurement methods III Research for estimation of solid particle flow rate from particle-water mixture fluid with Coriolis flowmeter Satoshi Yuzawa, Haruka Matsugaki, Yuki Fushimi, Hidetaka Ohno, Fumihiro Inoue, Hideki Matsuoka Abstract: The mass flow rate and density of a mixture of solid particles and water were measured using a Coriolis flowmeter. The mass flow rate of the particles was estimated to about 70% value of the actual value and it was found that this difference was almost completely reflected in the comparison of the density measurement. The development of a density calculation formula for Coriolis flowmeters applicable to mixtures of different phases was identified as an issure. Measurement of mean velocity and turbulent fluctuations using elastic filament velocimetry in low-speed flows Takuma Matsui, Kiyotaka Obunai, Shumpei Hara Abstract: Elastic Filament Velocimetry (EFV) is a flow measurement technique that detects fluid velocity by measuring the change in electrical resistance caused by axial deformation of a filament under fluid stress. In this study, we investigated the capability of EFV to measure both the mean velocity and turbulent fluctuations in low-speed airflow below 13 m/s. An EFV sensor using a platinum filament was fabricated, and wind tunnel experiments were conducted under 14 discrete flow conditions. The relationship between flow velocity and resistance was established using the measured data. The results confirmed that EFV can accurately capture changes in mean flow velocity even in the low-speed regime. However, in the measurement of turbulent fluctuations, the resistance signal was affected by external noise such as power supply interference and temperature variations, leading to an overestimation of turbulence intensity. Future improvements, including the use of thermally stable materials and enhanced noise reduction techniques, are expected to improve the accuracy of EFV in capturing true turbulence-induced velocity fluctuations. Digital Holographic Study of Sessile Acetone Droplet Evaporation Jawahar Prakash J, Advaith S, Ganesan A.R, Mani A Abstract: The present study investigates the evaporation dynamics of a sessile acetone droplet on an aluminium substrate using digital holography and Fourier Transform Profilometry (FTP). A Mach-Zehnder Interferometer with a red laser (632 nm) is employed to record images for this analysis. The reference image is captured prior to placing the droplet, while the object image is recorded after placing the droplet. By computing the phase difference between these holograms, the evolution of the droplet evaporation profile is determined. The phase difference is correlated with the refractive index variations in the surrounding air, enabling the reconstruction of the vapor concentration field. This non-intrusive optical approach provides an accurate, high-resolution method to visualize droplet evaporation processes.

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