Physical modelling of viscous fluid flows with the lengh-variable flow rate
DOI:
https://doi.org/10.15587/1729-4061.2012.4155Keywords:
abnormally viscous fluid, flow rate, rheological characteristics, coefficient of hydraulic friction, velocity gradient.Abstract
The article concerns the flow of abnormally viscous fluids in pipelines with length-varying flow rate. The solutions of carboxymethyl cellulose and glycerin were used as the working fluids, modelling the rheological behavior of oil. The rheological characteristics of Algerian oil at different temperatures were represented. The obtained results of researches are presented as pressure curve along the channel at the flow of the aqueous solution of CMC with 2% concentration, which is a non-Newtonian fluid. The rheological behavior of this fluid can be described by Oswald de Ville’s law. The scheme of the channel and the distance between the heads, mounted along the pipeline are presented in the figures. The table shows the experimental data to determine the coefficients of hydraulic friction λ in different areas and at different flow rates in accordance with the installation diagram. The dependence of the static pressure change along the channel is shown. During the experiments, there were measured such quantities as pressure and its changes along the channel, the flow rate and its changes along the channel at fixed temperatures and set rheological properties of used fluids, and the flow rates, flowing through the heads.References
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