Simulation of flow induced vibration of a cylinder in an expansion tube
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2022
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866916178215043072 |
|---|---|
| author | Peng, Sai Deng, Qiyu Zhou, Lin Huang, Tao Yu, Peng |
| author_facet | Peng, Sai Deng, Qiyu Zhou, Lin Huang, Tao Yu, Peng |
| contents | In this study, a series of simulations are conducted to investigate the motion of a small cylinder in an expansion tube, focusing on two-dimensional dynamics. These simulations are performed on the FLUENT platform employing the Overset function. The collision between the cylinder and the tube wall is modeled as a positive rigid body collision without losing energy. Two key parameters, the dimensionless gravity (Mg*) and the Reynolds number (Re), were explored within the ranges of 4.9-79.4 and 1-300, respectively. Two types of inflow are considered: the invariable inflow or superimposed a sinusoidal inflow of periodical fluctuation. For invariable inflow, three motion modes (drainage mode, balance mode and vibration mode) are found in the phase diagrams of (Mg*, Re). For an invariable inflow, the high-amplitude vibrations of a cylinder is proved to be widespread in the Reynolds number range from 5 to 40. Additionally, the scenario involving Re =300, Mg* =39.25 with sinusoidal periodic fluctuation incoming flow demonstrated intense vibrations of the cylinder. The behavior of the two-dimensional cylinder can be approximated as a simplified version of a three-dimensional sphere when the spherical motion is disregarded. Our research may help to understand this ancient flow problem. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2205_01820 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Simulation of flow induced vibration of a cylinder in an expansion tube Peng, Sai Deng, Qiyu Zhou, Lin Huang, Tao Yu, Peng Fluid Dynamics In this study, a series of simulations are conducted to investigate the motion of a small cylinder in an expansion tube, focusing on two-dimensional dynamics. These simulations are performed on the FLUENT platform employing the Overset function. The collision between the cylinder and the tube wall is modeled as a positive rigid body collision without losing energy. Two key parameters, the dimensionless gravity (Mg*) and the Reynolds number (Re), were explored within the ranges of 4.9-79.4 and 1-300, respectively. Two types of inflow are considered: the invariable inflow or superimposed a sinusoidal inflow of periodical fluctuation. For invariable inflow, three motion modes (drainage mode, balance mode and vibration mode) are found in the phase diagrams of (Mg*, Re). For an invariable inflow, the high-amplitude vibrations of a cylinder is proved to be widespread in the Reynolds number range from 5 to 40. Additionally, the scenario involving Re =300, Mg* =39.25 with sinusoidal periodic fluctuation incoming flow demonstrated intense vibrations of the cylinder. The behavior of the two-dimensional cylinder can be approximated as a simplified version of a three-dimensional sphere when the spherical motion is disregarded. Our research may help to understand this ancient flow problem. |
| title | Simulation of flow induced vibration of a cylinder in an expansion tube |
| topic | Fluid Dynamics |
| url | https://arxiv.org/abs/2205.01820 |