TY - JOUR
T1 - Vortex generation and evolution in water waves propagating over a submerged rectangular obstacle. Part II
T2 - Cnoidal waves
AU - Chang, Kuang An
AU - Hsu, Tian Jian
AU - Liu, Philip L.F.
N1 - Funding Information:
This research was supported by grants from the National Science Foundation (CTS-9302203, CTS-9808542) to Cornell University. The financial supports for Tian-Jian Hsu provided by Department of Civil and Environmental Engineering, University of Delaware is also acknowledged.
PY - 2005/3
Y1 - 2005/3
N2 - Vortex generation and evolution due to flow separation around a submerged rectangular obstacle under incoming cnoidal waves is investigated both experimentally and numerically. The Particle Image Velocimetry (PIV) technique is used in the measurement. Based on the PIV data, a characteristic velocity, phrased in terms of incoming wave height, phase speed, dimension of the obstacle, and a local Reynolds number are proposed to describe the intensity of vortex. The numerical model, which solves the two dimensional Reynolds Averaged Navier Stokes (RANS) equations, is used to further study the effects of wave period on the vortex intensity. Measurements for the mean and turbulent velocity fields further indicate that the time history of the intensity of fluid turbulence is closely related to that of the vortex intensity.
AB - Vortex generation and evolution due to flow separation around a submerged rectangular obstacle under incoming cnoidal waves is investigated both experimentally and numerically. The Particle Image Velocimetry (PIV) technique is used in the measurement. Based on the PIV data, a characteristic velocity, phrased in terms of incoming wave height, phase speed, dimension of the obstacle, and a local Reynolds number are proposed to describe the intensity of vortex. The numerical model, which solves the two dimensional Reynolds Averaged Navier Stokes (RANS) equations, is used to further study the effects of wave period on the vortex intensity. Measurements for the mean and turbulent velocity fields further indicate that the time history of the intensity of fluid turbulence is closely related to that of the vortex intensity.
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U2 - 10.1016/j.coastaleng.2004.11.006
DO - 10.1016/j.coastaleng.2004.11.006
M3 - Article
AN - SCOPUS:14544276872
SN - 0378-3839
VL - 52
SP - 257
EP - 283
JO - Coastal Engineering
JF - Coastal Engineering
IS - 3
ER -