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Journal of Applied Mechanics and Technical Physics

, Volume 58, Issue 6, pp 1013–1020 | Cite as

On Stability of Plane and Cylindrical Poiseuille Flows of Nanofluids

  • V. Ya. Rudyak
  • E. G. Bord
Article
  • 21 Downloads

Abstract

Stability of plane and cylindrical Poiseuille flows of nanofluids to comparatively small perturbations is studied. Ethylene glycol-based nanofluids with silicon dioxide particles are considered. The volume fraction of nanoparticles is varied from 0 to 10%, and the particle size is varied from 10 to 210 nm. Neutral stability curves are constructed, and the most unstable modes of disturbances are found. It is demonstrated that nanofluids are less stable than base fluids; the presence of particles leads to additional destabilization of the flow. The greater the volume fraction of nanoparticles and the smaller the particle size, the greater the degree of this additional destabilization. In this case, the critical Reynolds number significantly decreases, and the spectrum of unstable disturbances becomes different; in particular, even for the volume fraction of particles equal to 5%, the wave length of the most unstable disturbances of the nanofluid with particles approximately 20 nm in size decreases almost by a factor of 4.

Keywords

nanofluid hydrodynamic stability laminar–turbulent transition Poiseuille flow 

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Copyright information

© Pleiades Publishing, Ltd. 2017

Authors and Affiliations

  1. 1.Novosibirsk State University of Architecture and Civil Engineering (SIBSTRIN)NovosibirskRussia

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