Abstract
The flow field that results between a plane wall and a normally
oscillating cylinder is explored through a series of particle image
velocimetry (PIV) experiments. Sinusoidal cylinder motion is
considered for Keulegan Carpenter (KC) numbers between 1 – 10
and Reynolds numbers (Re) less than 5000 (holding β=Re/KC
constant). A constant minimum gap ratio between the cylinder and
wall equal to 0.125 is adopted for all experiments. For sufficiently
small KC and Re, the measured flow velocities beneath the
cylinder show good comparison with both analytical predictions
based on continuity arguments and on potential flow theory. At
larger KC number asymmetry results, which is not captured in the
analytical predictions. Over the full parameter space the results are
used to explore the relationship between the motion of the cylinder
and the flow velocity near the wall. It is believed that this
relationship is important for quantifying the sediment transport
beneath offshore infrastructure such as riser pipelines and mooring
line chains, which oscillate normal to the seabed.
oscillating cylinder is explored through a series of particle image
velocimetry (PIV) experiments. Sinusoidal cylinder motion is
considered for Keulegan Carpenter (KC) numbers between 1 – 10
and Reynolds numbers (Re) less than 5000 (holding β=Re/KC
constant). A constant minimum gap ratio between the cylinder and
wall equal to 0.125 is adopted for all experiments. For sufficiently
small KC and Re, the measured flow velocities beneath the
cylinder show good comparison with both analytical predictions
based on continuity arguments and on potential flow theory. At
larger KC number asymmetry results, which is not captured in the
analytical predictions. Over the full parameter space the results are
used to explore the relationship between the motion of the cylinder
and the flow velocity near the wall. It is believed that this
relationship is important for quantifying the sediment transport
beneath offshore infrastructure such as riser pipelines and mooring
line chains, which oscillate normal to the seabed.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 20th Australasian Fluid Mechanics Conference |
| Editors | Greg Ivey, Nicole Jones, Tongming Zhou |
| Place of Publication | Australia |
| Publisher | Australasian Fluid Mechanics Society |
| Number of pages | 4 |
| ISBN (Electronic) | 9781740523776 |
| ISBN (Print) | 9781740523776 |
| Publication status | Published - Dec 2016 |
| Event | 20th Australasian Fluid Mechanics Conference - University of Western Australia, Perth, Australia Duration: 5 Dec 2016 → 8 Dec 2016 Conference number: 20 http://www.afms.org.au/20AFMC/ |
Conference
| Conference | 20th Australasian Fluid Mechanics Conference |
|---|---|
| Abbreviated title | AFMC |
| Country/Territory | Australia |
| City | Perth |
| Period | 5/12/16 → 8/12/16 |
| Internet address |