Simple Rheoscopic Flows Used in Teaching Fluid Mechanics

Abstract

Four simple demonstration experiments are presented. They are used as a support in the teaching of Fluid Mechanics I (a compulsory lecture at the University of West Bohemia in Pilsen). All mentioned experiments use the rheoscopic fluid obtained as a water solution of mica powder to visualize the flow in a esthetic way, which, as we hope, has a potential to attract students attention. The experiments are: demonstration of Bernoulli equation in a widening and narrowing channel, Taylor-Couette flow, the effect of viscosity to the scales and decay of turbulence, and the Galilean transformation inside an axial compressor.

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“…We wish to share with the students our exultation over all the beautiful and rich phenomena of the God's creation. We continue our work (Duda et al, 2019) (Duda, Uruba, & Yanovych, 2022) by simple apparatus for demonstration of the jet flow, which shows not only jet itself, but also the time-irreversibility on a simple case.…”