CFD Oil Flow Study in Magna’s Pumpless System Approach II Update May 4, 2011

Approach I Assumptions Chain is modeled as a moving plate Chain is modeled as a moving plate Flow is modeled as internal flow in a duct Flow is modeled as internal flow in a duct - Model 1: Rectangular duct - Model 2: Includes geometric details - Model 2: Includes geometric details Duct is completely filled with oil Duct is completely filled with oil Flow is driven by the moving plate Flow is driven by the moving plate Flow is steady and incompressible Flow is steady and incompressible

Model 1 Geometry and Mesh L = 200 mm W = 48 mm 4.3 mm GeometryNodesElements Simple Geometry Model

Model 1 Mesh

Flow Geometry

Model 2 Geometry and MeshGeometryNodesElements Detailed Geometry Model

Velocity Profile on Outlet

Velocity profile on Outlet

Approach II Model Ch a in Oil deflector

Approach II  Use Detailed Geometry Model  Two-phase Flow (Oil - Air)  Transient Flow  With and Without Gravity (  =22, 27 deg.)   Model Oil Flow around Detailed Model of Chain   Model Different Chain Speeds 250 – 3000 rpm

Two-Phase Transient Flow in Simple Geometry

Two-Phase Transient Flow in Semi-detailed Geometry

Two-Phase Transient Flow in more-detailed Geometry

Next Steps   Model Oil Flow around Detailed Model of Chain   Model Different Chain Speeds 3000 rpm Approach III   Incorporate Chain Details instead of Plate   Incorporate Additional Geometric Details into the Model

Discussion