tmany-grain-collision.sh - granular - granular dynamics simulation
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       tmany-grain-collision.sh (745B)
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            1 #!/bin/sh
            2 
            3 # stop the shell script if there's an error
            4 set -e
            5 
            6 # set a common id string for files
            7 id=many-grain-collision
            8 
            9 # remove any old files associated with this id
           10 rm -f ${id}.grains.*.{tsv,png} ${id}.mp4
           11 
           12 # create a single grain and a granular packing, and simulate the interaction over time
           13 (granulargrain -R -u 1.0 -y 2.5; granularpacking -X 2.2) | granular -e 4.0 -I 0.1 ${id}
           14 
           15 # plot grain positions over time, colored by their horizontal velocity
           16 for f in ${id}.grains.*.tsv; do
           17         granular2img -f '$5' -l 'x velocity [m/s]' -t png < "$f" > "${f%.tsv}.png"
           18 done
           19 
           20 # combine grain plots into animation
           21 ffmpeg -y -framerate 5 -i ${id}.grains.%05d.png \
           22         -c:v libx264 -r 30 -pix_fmt yuv420p ${id}.mp4
           23 
           24 # open animation
           25 xdg-open ${id}.mp4