The Positive Crankcase Ventilation (PCV) system in a car engine is designed to lower the pressure\nin the crankcase, which otherwise could lead to oil leaks and seal damage. The rotation of crankshaft\nin the crankcase causes the churn up of oil which conducts to occurrence of oil droplets\nwhich in turn may end in the PCV exhaust air intended to be re-injected in the engine admission.\nThe oil catch can (OCC) is a device designed to trap these oil droplets, allowing the air to escape\nfrom the crankcase with the lowest content of oil as possible and thus, reducing the generation\nand emission of extra pollutants during the combustion of the air-fuel mixture. The main purpose\nof this paper is to optimize the design of a typical OCC used in many commercial cars by varying\nthe length of its inner tube and the relative position of the outlet from radial to tangential fitting to\nthe can body. For this purpose, CFD parametric analysis is performed to compute a one-way coupled\nLagrangian-Eulerian two-phase flow simulation of the engine oil droplets driven by the air\nflow stream running through the device. The study was performed using the finite volume method\nwith second-order spatial discretization scheme on governing equations in the Solid Works-EFD\nCFD platform. The turbulence was modelled using the k- model with wall functions. Numerical\nresults have proved that maximum efficiency is obtained for the longest inner tube and the tangential\nposition of the outlet; however, it is recommended further investigation to assess the potential\nerosion on the bottom of the can under such a design configuration.
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