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Parallelise DEFINE_GRID_MOTION for dynamic mesh

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Old   October 29, 2016, 02:15
Default Parallelise DEFINE_GRID_MOTION for dynamic mesh
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Hello everyone,

I've been really struggling with parallelising my UDF for dynamic mesh update. Basically the UDF is at each time step to read in a CSV file containing coordinates for each grid point of my mesh and update the coordinates, then fluent does smoothing and remeshing of the deforming domain based on the updated coordinates. The UDF works perfectly in serial, but I just can't get it to work in parallel.

I've attached the script here.

What I've been trying to do is to make the script loop through the faces and nodes (grid points) in serial because the order in which it does so is important due to the way the coordinates are ordered in the CSV files. However that doesn't seem to work. I also thought maybe I could get the IDs of the grid points so that I can use that to point to the corresponding coordinates in the CSV file, but how do you get grid point IDs? Do they still get ordered the same way when distributed across a number of compute nodes?

I've gone through the manual, tutorials and all the discussion threads I can find online but still don't know how to solve this.

Any help or suggestions will be greatly appreciated!
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File Type: c wall_csv.c (1.4 KB, 31 views)
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define_grid_motion, dynamic mesh, parallel, udf

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