Particle Collision with a wall in an Oblique Stagnation Flow under the Action of Gravity

抄録

The process of the particle collision with a plane wall is theoretically examined in an oblique stagnation flow under the action of gravity. It is shown that a particle motion in an oblique stagnation flow can be reduced to a motion in a normal stagnation flow using a transformation. Then equations of motion in the direction perpendicular to the wall and parallel to it are independent of each other and are separately solved. The critical condition of the collision with the wall of a particle with a co-ordinate and a velocity given initially is obtained. Under the action of gravity, characteristics of the particle collision are determined depending on whether the flow of the stagnation point is normal or oblique. For several practical cases, the influence of the direction of the oblique stagnation flow and of gravity is studied, and the critical condition of a particle collision, the collision time and the position of the collision are obtained.