[MilesHerro]

My 2D simulation scenario involves a water jet carrying particles, injected vertically through a 1mm diameter inlet at a speed of 20 m/s. The particles have a diameter of 2 micrometers and are sprayed onto a wall located 5mm away.
I want to obtain the particle distribution on the wall surface. Theoretical analysis suggests that the concentration should be highest in the middle, but the data I obtained after using multiphase flow, k-e turbulence model, and DPM is highly inaccurate.
Here are my questions：
1. Please tell me how I can obtain a particle distribution image similar to Figure 4.
2. Should I set it to steady-state or transient?
3. Since I need to perform integration on the particles later, is it possible to track the total number of particles over a period of time?

VOF and k-e setting are shown as Fig. 1.
DPM and injection setting are shown as Fig. 2.
Velocity distribution of water and chaotic particle distribution are shown as Fig. 3.
The correct particle distribution in previous studies is shown by the yellow triangles in the Fig. 4.