Optimized Stairmand Cyclone Separator

This is a Stairmand type cyclone separator with optimized geometry for better separation efficiency and reduced airflow resistance. It is inspired by the following study:
https://aaqr.org/articles/aaqr-13-04-oa-0129.pdf

Inlet and outlets have an outer diameter of 10 mm. Particle outlet has an inner diameter of 4 mm. For different diameter (D) values you can simply scale the model in your slicer by using the factor
F = D/10 (mm),
in which D is your required diameter in millimeters.
Note that the model is designed with its current overall dimensions in mind. Large scale factors will result in overly thick walls at some point.

There are 5 different clean air outlet configurations provided, 4 for every 90 deg in the horizontal plane and 1 in the upward direction. Note that STL files are upside down for printing purposes mentioned later below.

Ensure the following for the separator to work:

• higher air pressure at the inlet than at the clean air outlet
• particle outlet is pointing downwards
• inner diameter of the particle outlet is big enough for the collected particles to go through and not get stuck
• particle outlet is connected to a closed container (there must be no airflow), e.g., https://www.thingiverse.com/thing:7213794

I use this as an air oil separator in a car engine crankcase ventilation system and I am very impressed by its efficiency. I am also very pleased with the fact that it is maintenance free.

Material: Chemically resistant filament to whichever particle it collects.

Printing note: You will need supports for this one. It needs to be printed as oriented in the STL file (upside down) - do not rotate. This is mainly for the purpose of successfully printing the internal structure.

Model units: Millimeters (mm).

Infill: 100%

Please consider tipping/donating through the link below if you have use of my design. Any amount is greatly appreciated.
https://www.paypal.com/paypalme/marin1401