摘要：The downward movement of solid particles in the deformable channel is ubiquitous in nature, such as snakes devouring eggs and sediment particles going through soft tube fissures. This study takes the phenomenon of snakes devouring eggs as an example to conduct a mechanical analysis. The study obtains the force acting on the eggs in a channel, and builds the force model of the eggs in horizontal direction inside the snake's body. The model is also the mechanical model of the migrating non-deformable solid in a deformable channel. It can be obtained that the main cause of the egg's movement inside the lumen is that the pressure of the wall on the front end of the egg is greater than the sum of the pressure of the wall on the rear end and the friction of the middle section. The study contributes to the understanding of non-deformable solids' downward migration in the tube cavity. The analysis process can provide reference for the migration of underground sediments through rock and soil tube fissures in hydraulic engineering.
关键词：Solid particles;deformable channels;mechanical mechanism;mechanical model
