Abstract
The flow between two coaxial cylinders of polymer solutions has been investigated using laser-induced fluorescence flow visualization technique to clarify the viscoelastic effect on the flow patterns in the region. Test fluids were Separan 10〜1000ppm solutions. Visual observations and measurements of the axial wavelength of Taylor cells led to the conclusion that the vortex which occurs at the upper and lower side expands very long because of the viscoelasticity of the polymer solutions. The concentration of the polymer solutions effects on the phenomena. At the higher concentrations, the critical Reynolds number which Taylor vortex appears increases and the axial wavelength at the upper and lower side increases.
