To determine the appropriate size of the pores for your internal part, there are several factors to consider:
1. **Gas Properties**: The type of gases you're dealing with (molecular weight, viscosity, etc.) will influence how they flow and how big the pores need to be to redirect and slow them down.
2. **Desired Flow Rate**: Consider the flow rate of the gases that you need to maintain. Smaller pores can create more resistance to flow, which


