Rheological Features of Water Flow in Microcracks

• Published in: Journal of engineering physics and thermophysics Vol. 97; no. 3; pp. 663 - 667
• Main Authors: Veliev, F. G., Mamedova, M. A., Aslanova, A. R.
• Format: Journal Article
• Language: English
• Published: New York Springer US 2024; Springer Nature B.V
• Subjects: Classical Mechanics; Complex Systems; Electrokinetics; Engineering; Engineering Thermodynamics; Heat and Mass Transfer; Industrial Chemistry/Chemical Engineering; Microchannels; Microcracks; Newtonian fluids; Rheological properties; Thermodynamics; Transfer Processes in Rheological Media; Viscous fluids; Water flow; streaming potential; microcrack opening; flow curves; microcrak; double electric layer; ultimate shear stress; structural viscosity; antistatic additives
• ISSN: 1062-0125; 1573-871X
• DOI: 10.1007/s10891-024-02936-9

Rheophysical phenomena during the flow of a viscous fluid (water) in differently opened flat microcracks have been studied. The role of the electrokinetic factor in the manifestation of the nonlinear rheological effect in a water flow in a microchannel model — the transformation of a Newtonian fluid into a non-Newtonian one — is examined experimentally. Water flow curves were recorded and, based on the Bingham model, its rheological parameters were assessed for differently opened microcracks. It has been established that the non-Newtonian nature of water in microcracks is determined mainly by the value of the electrokinetic potential of the flow, and by reducing it, using antistatic additives, the nonlinear nature of the flow can be weakened significantly.