Wake-Induced-Vibrations of Circular Cylinders in Tandem Arrangement

6 Pages Posted: 12 Feb 2018 Last revised: 16 Feb 2018

See all articles by Sanjeet Kumar

Sanjeet Kumar

Indian Institute of Technology, Dhanbad

Deepak Kumar

Indian Institute of Technology, Dhanbad, Students

Kumar Sourav

Indian Institute of Technology, Dhanbad

Subhankar Sen

Indian Institute of Technology, Dhanbad

Date Written: December 21, 2017

Abstract

Stabilized space-time finite element technique is utilized to perform numerical simulation on the wake-induced-vibrations of two identical tandem circular cylinders placed in the flow at Reynolds number 100. Cylinders are separated by a center to center distance of 5 times the diameter of the cylinder. Results are computed for various values of reduced velocities (1 to 8). The downstream cylinder, of mass ratio 10, is allowed to execute oscillations in both in-line and transverse directions, whereas the upstream cylinder is stationary. Response curve of downstream cylinder is observed to be composed of initial and lower branches. Phenomenon of lock-in is identified at a reduced velocity of 5. Nature of flow exhibits periodicity for the entire range of initial branch with single dominant lift frequency. For reduced velocity near the end of lock-in, flow and body motion shows quasi-periodic behavior with complicated non-overlapping loops in the cylinder trajectory as well as in the phase plots of drag and lift coefficients.

Keywords: Circular Cylinders, Periodic and Quasi Periodic Flow, Tandem Arrangement, Two Degree-of-Freedom, Wake Induced Vibration

Suggested Citation

Kumar, Sanjeet and Kumar, Deepak and Sourav, Kumar and Sen, Subhankar, Wake-Induced-Vibrations of Circular Cylinders in Tandem Arrangement (December 21, 2017). International Conference on Advances in Thermal Systems, Materials and Design Engineering (ATSMDE2017). Available at SSRN: https://ssrn.com/abstract=3101982 or http://dx.doi.org/10.2139/ssrn.3101982

Sanjeet Kumar (Contact Author)

Indian Institute of Technology, Dhanbad ( email )

Sardar Patel Nagar
Dhanbad, Jharkhand 826004
India

Deepak Kumar

Indian Institute of Technology, Dhanbad, Students ( email )

Sardar Patel Nagar
Dhanbad, Jharkhand 826004
India

Kumar Sourav

Indian Institute of Technology, Dhanbad ( email )

Sardar Patel Nagar
Dhanbad, Jharkhand 826004
India

Subhankar Sen

Indian Institute of Technology, Dhanbad ( email )

Sardar Patel Nagar
Dhanbad, Jharkhand 826004
India

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