File:Pebble accretion 2 r 1 1 1 1.png
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Summary
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| Description |
English: Basic principle of ebble accretion in gaseous protoplanetery disc. Big pebbles does not collide so easily to planet than smaller pebbles.
This is because gas drag. Gas friction slows down a bit of smaller pebbles, that has lower Stokes number St. Bigger pebbles has big stokes number, sho gas slows down them little. |
| Date | |
| Source | Own work |
| Author | Merikanto |
POV-Ray 3.8 source code
//###############
//#
//## pebble accretion
//#
//## pov-ray 3.8 source code
//#
//## 14.5.2024 0000.0000
//#
//######
- include "colors.inc"
- include "textures.inc"
- include "stones.inc"
- include "shapes.inc"
- include "shapes2.inc"
- include "functions.inc"
- include "math.inc"
- include "transforms.inc"
camera {
location z*50
look_at 0
angle 18
}
light_source {
<3000,0,1000>*1000*1000
color rgb 1
}
background {
color rgb <0.9,0.9,1>
}
- declare mark_sphere1= object {
sphere {
0,1
}
scale 0.03
pigment {color rgb <1,0,0>}
finish {ambient 1 }
}
- declare mark_sphere2= object {
sphere {
0,1
}
scale 0.03
pigment {color rgb <0,1,0>}
finish {ambient 1 }
}
- declare mark_sphere3= object {
sphere {
0,1
}
scale 0.03
pigment {color rgb <0.5,0.5,1>}
finish {ambient 1 }
}
- declare mark_arrow1= union {
cylinder { <-5,0,0>,<0,0,0>,1 }
cone { <0,0,0>,2,<3,0,0>,0 }
pigment { rgb<1,0,0> }
scale 0.1
}
- declare pebble1=object {
sphere {0, 1}
pigment { color <1,1,1>/2}
scale 0.1
}
object {
sphere {0, 1}
scale 1.25
pigment { color <0,0,1>}
}
- for (n,0,180)
#declare fii=((n*2))*pi/180;
#declare rr=4.5;
#declare px=cos(fii)*rr;
#declare py=sin(fii)*rr;
object {
object {mark_sphere3}
translate x*px
translate y*py
}
- end
//#for (n,-5000,5000)
// #declare px=n*0.01;
// #declare py=0.05*px*px+0.02*px-2;
- for (n,-100,100)
#declare px1=n*1;
#declare py1=0.05*px1*px1+-0.02*px1-2;
#declare px2=(n+1)*1;
#declare py2=0.05*px2*px2+-0.02*px2-2;
object {
// object {mark_sphere2}
// translate x*px
//translate y*py
cone { <px2,py2,0>,0.07,<px1,py1,0>,0.00 }
pigment {color rgb <0,1,0>}
finish {ambient 1 }
}
- end
- for (n,0,360)
#declare fii=((n*10))*pi/180;
#declare fii2=(((n+0.5)*10))*pi/180;
#declare rr=exp(fii/3);
#declare rr2=exp(fii2/3);
#declare px=cos(fii)*rr;
#declare py=sin(fii)*rr;
#declare px2=cos(fii2)*rr;
#declare py2=sin(fii2)*rr;
object {
cone { <px2,py2,0>,0.07,<px,py,0>,0.00 }
pigment {color rgb <1,0,0>}
finish {ambient 1 }
}
- end
object { pebble1
scale 4
translate y*-0.85
translate x*5
}
object { pebble1
scale 2
translate y*-4.0
translate x*5
}
Licensing
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This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. |
| The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 13:57, 14 May 2024 | | 2,400 × 1,800 (66 KB) | Merikanto (talk | contribs) | Uploaded own work with UploadWizard |
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