Dataset on rheological measurements of xanthan gum aqueous dispersions containing sodium chloride and settling dynamics of spheres and disks in these dispersions

Published: 26 September 2022| Version 1 | DOI: 10.17632/ntgfb38k69.1
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Description

This dataset contains (1) measurements of settling dynamics of spheres and disks in non-Newtonian aqueous solutions of sodium chloride with xanthan gum addition and (2) rheological characteristics of these solutions. Experiments on settling dynamics were carried out at the Laboratory of Hydrodynamic Micromodels, Institute of Geophysics Polish Academy of Sciences. Experiments comprised eleven test solutions with salt molar concentration varying between 0 M and 0.9 M and constant xanthan gum content equal to 1 g/L. Falling of two types of spheres, density of 1.41 g/cm3 varying in diameter (3.00 mm and 1.59 mm) and four types of disks, density of 1.43 g/cm3, thickness of 0.3 mm varying in diameter (1.5 mm, 2.0 mm, 2.5 mm, and 3.0 mm) was examined in a settling column using visualisation methods to achieve data on the position of particle centroid in time. Rheological measurements were carried out at the Faculty of Chemistry, Warsaw University of Technology to assess flow properties (shear dependent viscosity) and viscoelasticity (shear stress amplitude sweeps, frequency sweeps, the dependence of the first normal stresses difference on shear strain) of all test solutions.

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Institutions

Politechnika Warszawska Wydzial Chemiczny, Polska Akademia Nauk Instytut Geofizyki

Categories

Polymer, Polysaccharides, Rheology, Bacterial Polysaccharides, Sedimentation, Non-Newtonian Fluid Mechanics Experimental Methods, Food Rheology, Mechanics of Particles

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