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Research on the method of constructing a numerical wave-current flume

QIN Nan1,LU Chuan-jing1,2,LI Jie1(1.Department of Engineering Mechanics,Shanghai Jiao Tong University,Shanghai 200240,China;2.MOE Key Laboratory of Hydrodynamics,Shanghai 200240,China)  
A numerical wave-current flume is developed using the CFD software FLUENT.The numerical model is based on the RANS equations and VOF method.The flume inlet is defined as the position where the interactions between the currents and the waves set in.An artificial damping zone is located before the outlet boundary to remove the reflected waves.The validity of the numerical wave-current flume model is examined by previous experimental works.We start with the simplest uniform current condition.The interactions between the uniform currents and the linear waves could be described as the Doppler shift effect.The experiments conducted by Thomas are simulated to analyze the wave length and amplitude variations with the currents.For shear current condition,the experiments conducted by Kemp and Simons is studied numerically.The numerical results show good agreement with the measured data,which indicates the numerical wave-current flume can accurately simulate the interaction between waves and steady currents.
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