{"id":287002,"date":"2023-06-04T08:42:44","date_gmt":"2023-06-04T08:42:44","guid":{"rendered":"\/forum\/?post_type=topic&p=287002"},"modified":"2023-10-09T16:09:50","modified_gmt":"2023-10-09T16:09:50","slug":"modelling-ship-hydrodynamics-open-channel","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/modelling-ship-hydrodynamics-open-channel\/","title":{"rendered":"Modelling Ship hydrodynamics, open channel"},"content":{"rendered":"

I’m currently trying to simulate flow past the hull of a boat to calculate the drag coefficient. <\/p>\n

However, I have a pressure inlet and outlet such that the water level remains the same. However, as you can see in the image the water flows from the inlet and then causes a backflow and doesn’t create the free stream flow I would like. How can I change my boundary conditions or setup to ensure I achieve the free stream I would like. <\/div>\n
Some information on my setup can be found below:<\/div>\n
-VOF, multiphase (water and air)<\/div>\n
-Open channel flow, (no wave BC, with wave BC there was no change), implicit body force<\/div>\n
-K-Omega SST turbulence model.<\/div>\n
-Hull is fixed (preferably want to change it to moving mesh fixed on some axes as a bobbing boat on the water)<\/div>\n
-Pressure inlet and outlet (Velocity inlet I achieved the same results)<\/div>\n
-Inlet is set to 1.5m\/s at a level 0.25 m (waterline)<\/div>\n
-Outlet is set to 0.25m,<\/div>\n
-Wall is no slip<\/div>\n
If more information is required, let me know. <\/div>\n
Thank you for taking the time to read my post,<\/div>\n
<\/a><\/div>\n
 <\/div>\n","protected":false},"template":"","class_list":["post-287002","topic","type-topic","status-closed","hentry","topic-tag-multiphase_models-1","topic-tag-fluent","topic-tag-hull-1","topic-tag-open-channel","topic-tag-ship","topic-tag-transient","topic-tag-turbulence"],"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\n\t\t\n\t\t\n\t\t