To my understanding, the application of global mapping will transform the deforming computational domain to static one. So, the post-processing of the results will be on the static mesh. Since additional terms related to the global mapping are added to the Navier-Stokes equations and also the boundary conditions are imposed in the new coordinate system, the simulated forces from the pressures on the body are the same as that in the deformed domain case. Several references related to the coordinate transformation method are listed below for your convenience.

Newman, D.J., Karniadakis, G.E., 1997. A direct numerical simulation study of flow past a freely vibrating cable. Journal of Fluid Mechanics 344, 95–136. https://doi.org/10.1017/S002211209700582X

Li, L., Sherwin, S.J., Bearman, P.W., 2002. A moving frame of reference algorithm for fluid/structure interaction of rotating and translating bodies. International Journal for Numerical Methods in Fluids 38, 187–206. https://doi.org/10.1002/fld.216

Serson, D., Meneghini, J.R., Sherwin, S.J., 2016. Velocity-correction schemes for the incompressible Navier–Stokes equations in general coordinate systems. Journal of Computational Physics 316, 243–254. https://doi.org/10.1016/j.jcp.2016.04.026

Wish it will help.

On Oct 20, 2020, at 7:08 AM, Debbahi Saad <saad.debbahi@gmail.com> wrote:

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Dear Nektar users,

I have launched a few runs of the cylinder example demonstrating the global mapping approach for geometry deformation, using the IncNavierStokesSolver, however when trying to visualize the deformation under Paraview or Tecplot the post-processor shows no geometry alteration? Please notice that I've used the Hdf5 output format for parallel run. and batch converted the *.chk files using FieldConvert which definitely uses the same XML session file to generate the .plt and .vtu files.
If it's normal to see no geometry alteration, could there be a way to alter the geometry accordingly and obtain a model that visually deforms in the post-processor?

Thanks to all of you,

S. Debbahi
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