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Open Physics

formerly Central European Journal of Physics

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Volume 9, Issue 3 (Jun 2011)


Effect of side walls on the motion of a viscous fluid induced by an infinite plate that applies an oscillating shear stress to the fluid

Constantin Fetecau
  • Department of Theoretical Mechanics, Technical University of Iasi, 700050, Iasi, Romania
  • Email:
/ Dumitru Vieru
  • Department of Theoretical Mechanics, Technical University of Iasi, 700050, Iasi, Romania
  • Email:
/ Corina Fetecau
  • Department of Theoretical Mechanics, Technical University of Iasi, 700050, Iasi, Romania
  • Email:
Published Online: 2011-02-26 | DOI: https://doi.org/10.2478/s11534-010-0073-1


The velocity field corresponding to the unsteady motion of a viscous fluid between two side walls perpendicular to a plate is determined by means of the Fourier transforms. The motion of the fluid is produced by the plate which after the time t = 0, applies an oscillating shear stress to the fluid. The solutions that have been obtained, presented as a sum of the steady-state and transient solutions satisfy the governing equation and all imposed initial and boundary conditions. In the absence of the side walls they are reduced to the similar solutions corresponding to the motion over an infinite plate. Finally, the influence of the side walls on the fluid motion, the required time to reach the steady-state, as well as the distance between the walls for which the velocity of the fluid in the middle of the channel is unaffected by their presence, are established by means of graphical illustrations.

Keywords: unsteady motion; side walls; oscillating shear stress; exact solutions

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About the article

Published Online: 2011-02-26

Published in Print: 2011-06-01

Citation Information: Open Physics, ISSN (Online) 2391-5471, DOI: https://doi.org/10.2478/s11534-010-0073-1. Export Citation

© 2010 Versita Warsaw. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. (CC BY-NC-ND 3.0)

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