Abstract
The oscillation frequencies produced by oscillation-type density meters during the density measurements suffer damping due to the viscosity of Newtonian liquids. The effect of viscoelastic behaviour of non-Newtonian liquids in the damping of these oscillations is still not known. So, 7 viscoelastic liquids were rheologically characterized, resorting to a rheometer, and their density measured in order to provide a deeper insight into the damping effects produced by these types of fluids. To do so, oscillatory data was related with the obtained density deviations. The results of this study will give further insights for the knowledge of the measuring behaviour of these density meters when measuring viscoelastic fluids, one of the scopes of the EMPIR Project 17RPT02-rhoLiq.
Highlights
1.1 Density of fluids Density, is one of the major driving elements in economic transactions with important goods, ranging from fuels to liquid food products
As a static method it is expected that viscoelastic properties of samples would not influence density measurement results, as it might do in oscillation-type density meters
Oscillation-type density meters have shown to be convenient instruments to measure the density of Newtonian liquids in a wide range of density, viscosity and temperature, with an expanded uncertainty from 0.01-0.03 kg m-3, by using a proper calibration curve, since the deviations due to viscosity may lead to a maximum density deviation of 0.62 kg m-3 in the viscosity interval up to 795 mPa s [8]
Summary
1.1 Density of fluids Density, , is one of the major driving elements in economic transactions with important goods, ranging from fuels to liquid food products. Fluids’ physical properties such as: density, surface tension, viscosity and elasticity (i.e. viscoelastic behavior due to dissolved gases like carbon dioxide in beverages, suspended particles like in the pulp in a natural juice, etc.), among others, cover a wide spectrum of variation. These liquids are handled in a wide range of temperature and pressure. Improvements in the quality of fluids density measurements will have a direct impact at industrial sites, leading to more competitive national industries and it will allow a free circulation within the EU market
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
