# Two-Parameter Probabilistic Model and Experimental Research on Micron Particle Deposition
## 3 Results and Discussion
### Simulation Results and Test Results
#### 3.3.3 Particle Deposition Morphology of Test Results  
In the particle migration and deposition test under 12 m/s wind speed conditions, the deposition conditions of two groups of 30 D particle-sampling plates on the lower, left, and right walls were obtained (because the hot-wire wind speed sensor probe was installed on the upper wall of the particle transport pipeline, a sampling plate could not be arranged). Observe the overall deposition status of 10 um silicon dioxide (SiO\({}_{2}\)) sample 1, as shown in Figure 8a; the deposition morphology of the three wall surfaces is streamlined, the particle deposition amount of the head-piece is higher than the end-piece, and the particle deposition at the angle between the left wall and the lower wall of the head-piece is lower, among which, the particle deposition amount of the lower wall is obviously higher than the left wall and the right wall; the head-piece particle deposition is obvious, accompanied by impact residue, flake peeling, and a sliding mark after the agglomeration of large-scale particles, and some deposition layers have an obvious thickness. Observe the overall deposition condition of 40 um silicon dioxide (SiO\({}_{2}\)) sample 2, as shown in Figure 8b; the deposition morphology of the three wall surfaces presents a streamlined shape, the particle deposition amount of the head-piece is higher than the end-piece, there is an obvious particle deposition low-density area at the angle between the left wall and the lower wall of the head-piece, the particle deposition amount of the lower wall is obviously higher than the left wall and the right wall, and the particle deposition rate is more significant. The streamlined direction of particle deposition morphology is consistent with the flow field direction, and the particle deposition amount of the head-piece is higher than the end-piece, which can also be found in the experimental results of sample 1, which accords with the morphology characteristics of particle deposition under the action of single-phase air fluid. There is an obvious lower-density area of particle deposition at the angle between the left wall and the lower wall of the head-piece, which can also be found in the experimental results of sample 1, but it is more obvious in the experiment of sample 2, which indicates that the deposition phenomenon of sample 2 occurs more frequently under the same wind speed. Compared with sample 1, the deposition amount on the three walls increases to varying degrees. The particle deposition quantity of the lower wall is obviously higher than that of the left wall and right wall, and the particle deposition distribution is farther from the inlet, which indicates the deposition distribution form of sample 2 under a wind speed of 12 m/s. This is consistent with the law obtained by the numerical simulation that \"the deposition distribution in gas transmission pipeline is mainly concentrated in the  
Figure 8: Experimental collection of particle transport at 12 m/s wind speed. (a) 10 μm; (b) 40 μm. lower wall from Head-piece to Mid-piece, Left wall and Right wall near the lower wall, where the lower wall is the deposition interval with the largest area. This is mainly due to the increase of particle size, which changes the main deposition form of particles from the original diffusion deposition to gravity deposition and inertia deposition\". The deposition morphology of particles on the lower wall is shown in Figure 9. Among them, sample 1 has a uniform spot deposition morphology as a whole, which conforms to the particle deposition law, as shown in Figure 9a. The particle spot deposition process is mainly due to the particle adhesion phenomenon in the process of impacting the wall surface, which may be caused by the large surface area of the particle or the high friction coefficient of the wall surface.