Cyclone Geometry and Meshing Fix

I need assistance fixing the cyclone geometry to ensure it is connected and contains one volume, with the swirl extension properly integrated inside the barrel. After resolving these issues, I require perfect meshing with explanations before proceeding to the solution phase (mesh independence) , which involves simulating gas flow with sand particles. I need to track, determine separation efficiency, outlet flow rate and pressure drop estimations

Key Requirements:
- Use ANSYS Fluent for CFD simulation and meshing.
- Address gaps or discontinuities in the current cyclone geometry.
- Proper meshing.
- Ensure the gas flow with sand particles is modeled as turbulent flow.
- Swiril Simulation.
- Particles tracking.
Ideal Skills and Experience:
- Proficiency in ANSYS Fluent for CFD simulations.
- Experience in fixing geometric issues such as gaps or discontinuities.
- Expertise in meshing complex geometries.
- Knowledge of simulating turbulent flow in gas-solid interactions.