- PII
- S30345537S0044453725040086-1
- DOI
- 10.7868/S3034553725040086
- Publication type
- Article
- Status
- Published
- Authors
- Volume/ Edition
- Volume 99 / Issue number 4
- Pages
- 595-604
- Abstract
- A structural rheological model is used to describe the thixotropic dispersed system of silicon dioxide in oil. The model includes a kinetic equation of the processes of formation and destruction of particle aggregates and a rheological equation containing a structural parameter (the number of aggregated particles in a unit volume). The case of an equilibrium plastic flow, which corresponds to experimental flow curves, is considered. The coefficients of the rheological equation are calculated. For a stepwise increase in the shear rate from γ1 to γ2 , the transient process is considered as a transition from one equilibrium state of the flow to another equilibrium state through a certain nonequilibrium state of the flow. The coefficient of deviation from equilibrium is introduced, and its dependence ζ(t) is calculated using exponential functions; the limiting value ζ0 is determined. The transient dependences τ1/2(t) are approximated.
- Keywords
- дисперсная система тиксотропные свойства структурная реологическая модель кривые течения переходный процесс при увеличении скорости сдвига
- Date of publication
- 15.04.2025
- Year of publication
- 2025
- Number of purchasers
- 0
- Views
- 28
References
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- 2. Yufei Wei. Investigating and Modeling the Rheology and Flow Instabilities of Thixotropic Yield Stress Fluids. A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy (Chemical Engineering). University of Michigan, 2019. 139 p.
- 3. Mujumdar A., Beris A.N., and Metzner A.B. // J. of Non-Newtonian Fluid Mech. 2002. V. 102. P. 157.
- 4. Cross M. // J. Colloid Sci. 1965. Vol. 20. P. 417.
- 5. Кирсанов Е.А., Матвеенко В.Н. Неньютоновское течение дисперсных, полимерных и жидкокристаллических систем. Структурный подход: монография М.: Техносфера, 2016. 384 с.@@ Kirsanov E.A., Matveenko V.N. Non-Newtonian flow of dispersed, polymer and liquid crystal systems. Structural approach. Moscow: Technosphere, 2016, 384 p. (in Russ.).
- 6. Кирсанов Е.А., Матвеенко В.Н. Вязкость и упругость структурированных жидкостей: монография М.: Техносфера, 2022. 284 с.@@ Kirsanov E.A., Matveenko V.N. Viscosity and elasticity of structured liquids. Moscow: Technosphere, 2022, 284 p. (in Russ.).
