Hello,<\/p>\n
I am trying to simulate the waves in Ansys Fluent from last 6 months but whatever I try waves are getting damped.<\/p>\n
Wave length is 1m and Wave height is 0.05m. Domain is rectangular 2D having 20m length. Water depth is 1m and air height is 1m. <\/p>\n
I have tried with fine hexahedral cells in the range of 100\/150 cells per wavelength and 20\/30 cells per waveheight<\/strong>.<\/p>\n The basic requirements are, deep water conditions<\/strong>, wave shouldn’t get damped, first order airy theory<\/strong> and K-w SST<\/strong> \/K-e Standard<\/strong> model for turbulence.<\/p>\n For wave generation, I tried by using Implicit VOF<\/strong> as well as Explicit VOF<\/strong> I have used open channel wave BC<\/strong>, Implicit body force<\/strong> and Sharp<\/strong> from interface modelling. Interfacial Anti-diffusion<\/strong> is also ticked.<\/p>\n In order to avoid reflection from opposite wall, numerical beach<\/strong> is provided over 10 wavelengths from opposite wall(Outlet).<\/p>\n Boundary Conditions: Velocity inlet BC at inlet. I also tried with SHM of inlet boundary using UDF. Pressure Outlet BC at the outlet and top air surface. Bottoom of the doamin is slip wall. <\/p>\n For implicit VOF: Pressure- Velocity coupling PISO as well as Coupled <\/strong>scheme is used, Pressure – PRESTO<\/strong>, momentum – second order upwind<\/strong>, Volume fraction – Compressive<\/strong>, Turbulent K.E- second order upwind<\/strong>, Sp. Dissipation rate – second order upwind<\/strong>, transient formulation – Bounded second order implicit<\/strong>.<\/p>\n For Explicit VOF: Level set<\/strong> was ticked. Pressure- Velocity coupling PISO <\/strong>scheme is used, Pressure – PRESTO<\/strong>, momentum – second order upwind<\/strong>, Volume fraction – Geo-Reconstruct<\/strong>, Turbulent K.E- second order upwind<\/strong>, Sp. Dissipation rate – second order upwind<\/strong>, transient formulation – First Order Implicit<\/strong>.<\/p>\n The problem is that the waves are losing energy (height) during the propagation phenomena in the domain. I have taken help from Ansys user manual and many other research papers to get waves that are not damping but I failed every time. it will be great help if someone can help me to resolve this issue.<\/p>\n Thank you in advance,<\/p>\n Best Regards<\/p>\n Chakra<\/p>\n <\/p>\n","protected":false},"template":"","class_list":["post-302788","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t