Axial flow centrifugal separator

A crankcase ventilation system comprising:

• a housing forming a central compartment and having an inlet and an outlet, the inlet configured to provide blowby gases from a crankcase of an internal combustion engine into the central compartment;
• and
• a rotating coalescer element installed in the central compartment, the rotating coalescer element comprising:
• a top endcap,
• a bottom endcap, and
• filter media contained within a space defined by the top endcap and the bottom endcap, the filter media interfacing with at least one of the top endcap or the bottom endcap such that rotation of the at least one of the top endcap or the bottom endcap is transmitted to the filter media, the filter media comprising a plurality of axial flow channels configured to receive blowby gas from the bottom endcap and to provide separated gas to the top endcap.