PietKuip said:Probably static electricity.
By friction. Friction between the particles in the powder, friction between particles and the walls. The walls may also get charged. It depends on materials, on humidity, etc. But in a vacuum, everything becomes dry.ravindrar said:May you explain. How static electricity generated.
PietKuip said:By friction. Friction between the particles in the powder, friction between particles and the walls. The walls may also get charged. It depends on materials, on humidity, etc. But in a vacuum, everything becomes dry.
(And it is not really friction, it is touching and separating that transfers electrons between surfaces.)
I don't know which would be better. If your vacuum were not too deep, you could, perhaps just use an AC discharge using RF excitation which would produce both polarities of ion all around your particles.ravindrar said:Thank you. May I use negative Ion generator? What if silo is grounded?
In a vacuum, there is no air resistance or buoyancy force acting on the particles. This means that the only force acting on the particles is gravity, causing them to fall down due to their own weight.
In a normal environment, fine and light particles may float or disperse due to air currents or other forces. However, in a vacuum, they will fall in a straight line towards the ground until they hit a surface or are acted upon by another force.
Technically, yes. Fine and light particles can be suspended in a vacuum using technologies such as electrostatic levitation or magnetic levitation. However, in a natural vacuum environment, they will eventually fall down due to gravity.
The rate at which particles fall in a vacuum is primarily determined by their size and weight. Smaller and lighter particles will fall more slowly than larger and heavier particles due to differences in their gravitational force. Air resistance can also play a role in the rate of fall, but it is negligible in a vacuum.
Yes, fine and light particles can be affected by other forces in a vacuum, such as electromagnetic forces or collisions with other particles. These forces may alter their trajectory or cause them to clump together, but ultimately gravity will still be the dominant force causing them to fall towards the ground.