Rectification on the inertial effects for co‐axial cylinders rheometer

Article type: Research Article

Authors: Zhang, Jian‐bao | Kuang, Zhen‐bang | Fan, Yun

Affiliations: Department of Physics, The Forth Military Medical University, Xi’an, 710032, China | Department of Engineering Mechanics, Shanghai Jiaotong University, Shanghai, 200240, China Tel.: +86 29 3221616‐75285; E‐mail: bme@fmmu.edu.cn

Abstract: The inertia of the fluid and the inner cylinder in co‐axial cylinders rheometer have a great influence on the unsteady flow of non‐Newtonian fluid. In the paper this phenomenon is studied minitely and a method to correct the measured results for an unsteady flow in the rheometer is proposed. It was found that the inertia effect of a fluid can be ignored when the gap between cylinders is smaller and the inertia effect of the inner cylinder can be represented with a vibration equation. Using the equation changes of Huang’s blood constitutive parameters are observed.

Keywords: Inertia, rheometer, fluid, hemorheology

Journal: Clinical Hemorheology and Microcirculation, vol. 19, no. 3, pp. 229-234, 1998