Observation of the chain transformation process in magnetorheological fluids using micro-DHPTV

Hai Liu; Zhixiong Zhao; Lin Hu; Yunxiu Shui; Gang Zhu

doi:10.1117/12.2267968

8 March 2017 Observation of the chain transformation process in magnetorheological fluids using micro-DHPTV

Hai Liu, Zhixiong Zhao, Lin Hu, Yunxiu Shui, Gang Zhu

Proceedings Volume 10255, Selected Papers of the Chinese Society for Optical Engineering Conferences held October and November 2016; 1025509 (2017) https://doi.org/10.1117/12.2267968
Event: Selected Papers of the Chinese Society for Optical Engineering Conferences held October and November 2016, 2016, Jinhua, Suzhou, Chengdu, Xi'an, Wuxi, China

Abstract

In the last years, several techniques have been developed for the measurement of the three velocity components in a fluid plane or volume.Digital holography particle tracing velocimetry(DHPTV)was applied to observe the chain transformation process of magnetorheological fluids (MR fluids) under an external magnetic field. With the help of correlation coefficient(CC)method[1], the focus plane of standard particle target was determined. The displacement of standard target mounted on a precise displacement measurement workbench was compared with the distance measured by difference of focal planes movement. Making use of a controlled rotating platform with constant revolving speed, the rotation speed of particles was obtained after extracting the coordinates from reconstruction images. The measured speed was compared with actual speed of particles,which can be worked out through rotation speed of platform. The transformation speed was measured when magnetic particle moved along with magnetic direction under an external magnetic field. The experiments showed that a visible part of 3D velocity field could be observed in the chain transformation process of MR fluids with DHPTV.

Citation Download Citation

Hai Liu, Zhixiong Zhao, Lin Hu, Yunxiu Shui, and Gang Zhu "Observation of the chain transformation process in magnetorheological fluids using micro-DHPTV", Proc. SPIE 10255, Selected Papers of the Chinese Society for Optical Engineering Conferences held October and November 2016, 1025509 (8 March 2017); https://doi.org/10.1117/12.2267968

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