What is the best way to control the packing density without changing the characteristics of the grading curve? In other words, how can I obtain a looser column?
Here are some ways which I though may work:
- Remove some particles from previously settled column randomly and the number of the particles can be estimated from the ratio of the smaller packing density to the denser one with respect to the total number of particles. But using this way I even end up with a greater packing density as 0.86 than the previous one 0.84。
- when assigning the suspended particles in rows and columns, give limited spacing in y direction.
- increase the friction angle only in the settling stage?
- Directly changing the grading curve. Like with bad grading where the minimum and maximum size of particles are more approaching the greater the void ratio will be.
Attached is the radius,x and y of the randomly particles-removed column and its ps.loose_50000_3rd.txt (1.2 MB)