INFLUENCE OF BOUNDARY LAYER THICKNESS ON THE NEAR-WAKE FLOW OF AN AXISYMMETIC BLUNT BASED BODY IN LAMINAR REGIME

1 Introduction 2 1.1 Flow Regimes . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.2 Goals & Outline . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2 Geometry and Numerical Methodology 7 2.1 Geometry and Numerical Set-up . . . . . . . . . . . . . . . . . 7 2.2 Numerical Model . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.3 Post-Processing . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3 Mesh and First Results 12 3.1 Mesh Sensitivity Analysis . . . . . . . . . . . . . . . . . . . . 12 3.2 Results: Re = 300 . . . . . . . . . . . . . . . . . . . . . . . . . 15 3.3 Results: Re = 800 . . . . . . . . . . . . . . . . . . . . . . . . . 19 3.4 Results: Re = 1500 . . . . . . . . . . . . . . . . . . . . . . . . 19 4 Investigation On The Axisymmetric Regime 20 4.1 Autosimilarity Analysis . . . . . . . . . . . . . . . . . . . . . . 20 4.2 Curvature Analysis . . . . . . . . . . . . . . . . . . . . . . . . 22 4.3 Delta Analysis: Dierent Body Lengths - Inlet Uniform . . . . 24 4.4 Delta Analysis: Dierent Body Lengths - Inlet = 0:1 . . . . 30 4.5 Delta Analysis: Same Body Length=2D -Dierent Inlet Ve- locity Prole . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3