Reply To: Three-phase Simulation: Eulerian Model for Free-Surface Flow around Bridge Pier

[luca.vene]

Thank you for your input. I’d like to clarify the problem I am working on. My focus is on a clear water scenario, meaning that I am not concerned with sediment inflow from upstream. Instead, I aim to determine the maximum potential scour depth. The bed material consists of uniform-sized particles.

In the Multiphase Model setup, along with selecting Inhomogeneous Models: Eulerian, I’m wondering if I should enable the DDPM model or the Multi-fluid VOF model, or possibly both. From my understanding:

   - The DDPM model would allow me to define sand as a discrete phase, while air and water are treated as Eulerian phases. This would be useful if I want to track the individual sand particles' behavior.

   - The Multi-fluid VOF model would be essential for capturing the air-water interface, especially for simulating free surface dynamics.

Since I’m focusing on clear water scour and need to model both the air-water interaction and sand particles as discrete entities, should I enable both the DDPM and Multi-fluid VOF models for this scenario?

At the start of the simulation, I would initialize the domain filled with air, then use the Patch command to specify where the water and sediment are located. I plan to set a velocity inlet for water inflow and a pressure outlet for the outlet and top surface.

I would appreciate any suggestions you may have regarding the simulation setup. Thank you for your time and assistance.

Best regards,

Luca