Nagaoka University of Technology

Masataka Shirakashi

Tsutomu Takahashi

Toshihiro Kawano

A planar elongational viscosity measuring method and apparatus which can advance analysis of planar elongational viscosities for high-viscosity and low-viscosity fluids. As a bomb-shell like bobis pushed into a container, a non-Newtonian fluidreaches a planar elongation state in a side space G, counterforce F applied to the bomb-shell like bobat this time is measured, planar elongation stress &#x3c3; is calculated using the counterforce F and conditions input by a user based on push-up force, the counterforce F, and the horizontal cross-sectional area of the side space G, and the planar elongation stress is divided by a planar elongation speed &#x3b5;', thereby acquiring a planar elongational viscosity &#x3b7;. Accordingly, it becomes possible to acquire planar elongational viscosities of not only a high-viscosity non-Newtonian fluid, but also a low-viscosity non-Newtonian fluid which is not likely to be solidified, resulting in an advancement of analysis of planar elongational viscosities for high-viscosity and low-viscosity fluids.

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Niigata, Japan

Masataka Shirakashi