{"id":391155,"date":"2024-10-24T06:05:53","date_gmt":"2024-10-24T06:05:53","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/vof-open-chanel-flow-reversed-flow\/"},"modified":"2024-10-24T06:05:53","modified_gmt":"2024-10-24T06:05:53","slug":"vof-open-chanel-flow-reversed-flow","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/vof-open-chanel-flow-reversed-flow\/","title":{"rendered":"VOF Open chanel flow reversed flow"},"content":{"rendered":"<p>&lt;p&gt;Hi everyone, I am trying to model a floating solar pv (with base) in fluent by using the volume of fluid method with the open channel flow model also activated. I also activated the energy equation, the radiation equation and a k- omega turbulence model. My BCs are velocity-inlet and pressure outlet. My fluid domain is an octogon with a total length of 25m. My mesh i believe it is fine based on that i dont have skewness over 0.8, aspect ratio over 12, and orthogonal quality under 0.2. In the manual&#8217;s reccomendations about open channel flow it says that: &#8220;In the case of reverse flow, the pressure outlet boundary behaves as a pressure inlet, and the boundary specific static pressure is taken as the Total Pressure. In this case, the static pressure is calculated from the&nbsp;total pressure.You can use the following text command to fix the boundary-specified static pressure, which&nbsp;helps to suppress reflections from the pressure boundary for certain cases: solve &rarr; set &rarr; open-channelcontrols&#8221;. The problem that i am facing is that i still have reversed flow and the variables that are not converging are continuity k and omega.&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;I have also tryied the following:&lt;\/p&gt;&lt;p&gt;1) denser grid&nbsp;&lt;\/p&gt;&lt;p&gt;2) face meshing in pressure outlets&lt;\/p&gt;&lt;p&gt;3) relaxation factors&lt;\/p&gt;&lt;p&gt;Do anyone has any idea on how can i solve this problem?&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-391155","topic","type-topic","status-publish","hentry","topic-tag-pressure-outlet","topic-tag-reversed-flow","topic-tag-vof"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hi everyone, I am trying to model a floating solar pv (with base) in fluent by using the volume of fluid method with the open channel flow model also activated. 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