Application of the electric field for reducing the suspension effective viscosity

• Autorzy: Taran E. Y. , Pridatchenko Y. V. , Gryaznova V. A.
• Konferencja: Second International Tribology Conference
• Języki publikacji: EN

Abstrakty

EN

The special features of electrorheological control over effective viscosity of dilute suspension with axisymmetric rigid suspended particles in a simple shear flow using a cross electric field are investigated. It is demonstrated that if the suspension carrier fluid is anisotropic then the orientation of suspended particles under the action of hydrodynamic forces and forces of electric field can lead to an anomalous reducing the suspension effective viscosity below the value of the effective viscosity of the carrier fluid. As a rheological model of the electrically neutral suspension carrier fluid and a hydrodynamic model of suspended particles, which have permanent dipole moment, the Ericksen anisotropic fluid and uniaxial dumbbell are used. The rheological equations of the suspension are obtained within the framework of the structure-phenomenological approach. The results obtained can be used in the lubricant rheology for the study of the possible influence of the orientation of particles of additives added to liquid crystalline lubricants for controlling their rheological properties.

Słowa kluczowe

EN

electrorheology; dilute suspension; rigid suspended particles; anisotropic carrier fluid

PL

hydromechanika; reologia; płyn nośny

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2002
• Tom: Vol. 7, Spec. is
• Strony: 93--98
• Opis fizyczny: Bibliogr. 9 poz., wykr.

Twórcy

autor

Taran E. Y.

• Faculty of Mechanics and Mathematics, Kyiv Taras Shevchenko National University 64, Volodymyrska St., 01033 Kyiv, UKRAINE

autor

Pridatchenko Y. V.

• Faculty of Mechanics and Mathematics, Kyiv Taras Shevchenko National University 64, Volodymyrska St., 01033 Kyiv, UKRAINE

autor

Gryaznova V. A.

• Faculty of Mechanics and Mathematics, Kyiv Taras Shevchenko National University 64, Volodymyrska St., 01033 Kyiv, UKRAINE

Bibliografia

• [1] Einstein A. (1906): Eine neue Bestimmung der Molekiildimens- Ann. Physik, vol.19, pp.289-306.
• [2] Einstein A. (1911): Berichtung zu meiner Arbeit: "Eine neue Bestimmung der Molekiildimensionen’’ Ann. Physik, vol.34, pp.591-592.
• [3] Ericksen J.L. (1960a): Transversely isotropic fluids. - Koli. Z., vol.173, No.2, pp.l 17-122.
• [4] Ericksen J.L. (1960b): Anisotropicfluids. - Arch. Ration. Mech. Anal., vol.4, pp.231-237.
• [5] Spenser A.J.M. and Rivlin R.S. (1959): The theory of matrix polynomials and its application on the mechanics of isotropic continua. - Arch. Ration. Mech. Anal., vol.2, pp.309-336.
• [6] Shmakov Y.I. and Taran E.Y. (1970): Structure-continual approach in rheology of polymer materials Inzh.-Fiz. Zhurn., vol. 18, No.6, pp. 1019-1024 (in Russian).
• [7] Taran E.Y. (1977): Rheological equation of state for dilute suspensions of rigid dumbbells with beads at the ends. — Prikl. Mekhanika, vol.13, No.4, pp.l 10-115 (in Russian).
• [8] Taran E.Y. (1978): Influence of electric field on rheological behaviour of dilute suspension of dipole dumbbells in Oldroyd elasticoviscous fluid.- Mekhanika Polimerov, No.3, pp 519-524 (in Russian).
• [9] Volkov V.S. and Vinogradov G.V. (1984): Molecular theories of nonlinear viscoelasticity of polymers. - Rheol. Acta, vol.23, pp.231-237.