Prescribed motion flow dynamics
The numerical analysis of a circular cylinder undergoing oscillations in a two-dimensional laminar flow pattern, is performed in this paper. The cylinder is subjected to forced oscillations transverse to the free stream flow. A detailed analysis is presented for prescribed frequency ratios which a...
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| Main Authors: | , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
2020
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/144390 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | The numerical analysis of a circular cylinder undergoing oscillations in a two-dimensional laminar flow pattern, is performed in this
paper. The cylinder is subjected to forced oscillations transverse to the free stream flow. A detailed analysis is presented for prescribed
frequency ratios which are half, equal and double to that of the vortex shedding frequency. The prescribed motion amplitudes investigated
range from 10-100 % of the cylinder diameter, at a fixed Reynolds number of 100. Detailed characteristics and field analysis of
prescribed motion dynamics is presented in the paper. When the prescribed frequency matches shedding frequency, phase transition between
transverse pressure force and displacement is witnessed along with the existence of a critical amplitude. The pressure distribution
and evolution of wake contours with respect to the cylinder motion and excitation frequency is critically analysed to develop insight of
the load development in the cylinder-fluid coupled system. |
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