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  • question about fvscheme with dynamic mesh

    Posted by Xin on February 19, 2024 at 12:09 pm

    Hi support team,

    In lesson 13, with dynamic mesh solver, why in fvscheme the laplacian scheme, it has two terms, velocity and displacement. Since dynamic mesh only includes a mesh velocity in the equation. Can you please explain how the displacement is included in the laplacian term? Thank you

    Regards,
    Xin Xiong

    Xin replied 4 months, 3 weeks ago 2 Members · 2 Replies
  • 2 Replies
  • Chennakesava

    Member
    February 20, 2024 at 10:15 am

    Hi,

    We need only the displacement one. The fluid mesh is solved for new positions of the mesh nodes, and then velocities are calculated from the displacements using time integration schemes.

    The code for the velocity was left there to help with the syntax.

    • Xin

      Member
      February 20, 2024 at 10:39 am

      Hi Dr Kadapa,

      I still don’t understand, as the equation show below, only velocity is needed in fluid solver. As my understanding, the process is as follows:
      1.fluid solver solve with added velocity only for dynamic mesh as equation shows,

      2. then force is calulated based on the fluid solver.
      3.And then solid solver in this case as Newmark solve the ode to calute the velocity, displacement and accelarate.
      4. displacement is implemented to the dynamic mesh.
      5. go back to 1

      …….
      so my question is why there is displacement in fluid solver.
      Thank you

      Regards,

      Xin Xiong

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