TY - GEN
T1 - Flow between a plane wall and an oscillating circular cylinder in still water at low KC and Reynolds number
AU - Tom, J. G.
AU - Draper, S.
PY - 2016/1/1
Y1 - 2016/1/1
N2 - 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.
AB - 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.
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M3 - Conference contribution
T3 - Proceedings of the 20th Australasian Fluid Mechanics Conference, AFMC 2016
BT - Proceedings of the 20th Australasian Fluid Mechanics Conference, AFMC 2006
PB - Australasian Fluid Mechanics Society
T2 - 20th Australasian Fluid Mechanics Conference, AFMC 2006
Y2 - 5 December 2016 through 8 December 2016
ER -