Vortex-induced vibration of a cylinder in pulsating nanofluid flow

  • Y. AminiEmail author
  • S. Akhavan
  • E. Izadpanah


In this paper, vortex-induced vibration of a circular cylinder with forced convection heat transfer and entropy generation in pulsating alumina–water nanofluid flow is investigated numerically. Numerical simulation is carried out for a constant mass ratio of 2 and damping ratio of 0.01 at a fixed Reynolds number of 150. The ranges of reduced velocity, particle volume fraction and inlet velocity oscillation amplitude are 3–8, 0–5% and 0–1, respectively. It was found that the lock-in phenomenon, nanofluid concentration and inlet velocity oscillation amplitude have an effective role in increasing heat transfer and decreasing entropy generation. Two wake patterns (2S and 2P) were observed in the present simulation. For velocity oscillation amplitude of 1, the transition from 2S to 2P modes occurs in vortex shedding pattern.


Vortex-induced vibration Nanofluid Pulsating flow Entropy generation Forced convection heat transfer 

List of symbols


Bejan number


Heat capacity (J Kg−1 k−1)


Lift coefficient


Drag coefficient


Heat capacity at constant pressure (J Kg−1 k−1)


Cylinder diameter (m)


Nanoparticle diameter (m)


Frequency (Hz)


Heat transfer coefficient (W/m2K)


Thermal conductivity (W m−1 K−1)


Boltzmann constant (J k−1)


Mass (Kg)


Nusselt number


Pressure (Pa)


Prandtl number


Heat transfer rate (W)


Kapitza resistance (K m2 W−1)


Reynolds number


Entropy generation rate (J Kg−1 k−1)


Strouhal number


Temperature (K)


Time (s)


Free stream velocity (m s−1)


Fluid velocity (m s−1)


Cylinder vertical displacement (m)


Nondimensional cylinder vertical displacement

Greek symbols


Fluid viscosity (Pa s)


Density (Kg m−3)


Angular position (°)


Nanoparticle concentration (%)



Base fluid








Fluid friction




Heat transfer













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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringPersian Gulf UniversityBushehrIran
  2. 2.School of Mechanical EngineeringTehran UniversityTehranIran

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