Length of my domain is 20 wavelengths so I am damping the last 10 wavelengths and my working area is just first 10 wavelengths. Also I have tried by providing no numerical beach as well as 2 numerical beach from outlet still waves were damping. I have open channel BC for pressure outlet and velocity inlet. I have also tried also by changing the initial values of Turbulent Kinetic Energy and Specific Dissipation Rate while initialization but the issue is not solved. I have no idea where I am missing.
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