cf) atoms, planets, stars, WD, NS, Universe… appendix
Dust Fall
1.Dust Fall toward the outer-edge of the inner hole.
Dusts naturally fall! This is not a trouble, but a universal phenomena
to form dense and high-speed torus along the outer-edge.
ダスト落下
ガスが存在する円盤内でのダストの運動方程式