How Fluent simulates tube size changes?

    • h395523899

      I want to simulate a section of pipe flow, while the pipe is affected by external forces, the length and diameter will change. How should I simulate this situation?

    • Karthik R


      You can use 2-way FSI to model such a problem. You will have to couple ANSYS mechanical and Fluent to model such a problem. Here are some videos you can use to start.

      Could you please elaborate a little more on your issue? We might be able to point you to some more information.

      Thank you.

      Best Regards,


    • h395523899

      Thank you for your answer

      I can't see the video because of the firewall.

      I still have a question.

      If the fluid is acid, the simulated tube wall is corroded and the wall thickness is thinner. Can Fluent do it? Still need another module coupling.

    • Rob
      Ansys Employee

      Yes, but you'd need to use moving mesh in Fluent and link it into some rate controlling equations, probably via UDF. However, what time scale does the corrosion occur in? Typically flow time scales are of the order of fractions of seconds, corrosion could be days/weeks or even years.

      The videos are on YouTube, so I don't think we can do anything about that.

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