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Nesting and Particle Tracking

asked 2019-03-15 06:35:13 +0200

Marine gravatar image

Hi Everyone,

I asked a long time ago on the inria forum the same question ( here ) but could not work on this since, so I am going to re-post it here.

I am trying to use CROCO with particle tracking and a nested grid. However I am facing a problem for the particle inside the child grid : They do not move !

I did 3 tests to initialize the floats module :

  • one floats.in file with all the particles inside the parent grid (Fgrd = 0), result : particles inside the child grid do not move,
  • one floats.in file with the adequate particles inside the child grid (Fgrd = 1), result : particles inside the child grid are well initialized but after the first time step the coordinates are set to 0,
  • two floats. in file (floats.in and floats.in.1), in floats.in.1 only the particle inside the nested area are declared, result : particles inside the child grid are well initialized but after the first time step the coordinates are set to 0.

Does/did someone face the same issue or do I miss a step ?

Thank you, Best regards, Marine

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answered 2019-04-08 04:36:07 +0200

Marine gravatar image

Hi Patrick and Gildas, Thank you for your answers. I tried with the 1 Way nesting, but I don't have the feeling it changes something (particles inside not moving). I may then consider switching to offline particle tracking. Thank you for your help ! Best, Marine

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answered 2019-04-04 19:32:27 +0200

At some point the FLOATS were working with 1-way nesting (this implementation was made by Xavier Capet). But I don't think it was used for a long time and don't know if it is still operational. Everyone seems to be doing offline Lagrangian computations nowadays (using offline ROMS float model by Xavier or Ariane: http://stockage.univ-brest.fr/~grima/... and others) ... Patrick

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answered 2019-04-04 14:26:54 +0200

GildasC gravatar image

Hi Marine,

I do not think the online lagrangian module is working ith the AGRIF online nesting. Other user's with experience could confirm that ? Brest, Gildas

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Asked: 2019-03-15 06:35:13 +0200

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Last updated: Apr 08