Computers and Concrete

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Classical shell theory for instability analysis of concrete pipes conveying nanofluid

  • Keikha, Reza (Department of Civil Engineering, Faculty of Engineering, University of Zabol) ;
  • Heidari, Ali (Department of Civil Engineering, Faculty of Engineering, University of Zabol) ;
  • Hosseinabadi, Hamidreza (Department of Civil Engineering, Faculty of Engineering, University of Zabol) ;
  • Haghighi, Mohammad Salkhordeh (Department of Civil Engineering, Faculty of Engineering, University of Zabol)
  • Received : 2018.04.16
  • Accepted : 2018.05.30
  • Published : 2018.08.25
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Abstract

This paper deals with the instability analysis of concrete pipes conveying viscous fluid-nanoparticle mixture. The fluid is mixed by $AL_2O_3$ nanoparticles where the effective material properties of fluid are obtained by mixture rule. The applied force by the internal fluid is calculated by Navier-Stokes equation. The structure is simulated by classical cylindrical shell theory and using energy method and Hamilton's principle, the motion equations are derived. Based on Navier method, the critical fluid velocity of the structure is calculated and the effects of different parameters such as fluid velocity, volume percent of nanoparticle in fluid and geometrical parameters of the pipe are considered. The results present that with increasing the volume percent of nanoparticle in fluid, the critical fluid velocity increase.

Keywords

References

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