🔥 ANSYS Meshing Course – Session 7 | Body of Influence (BOI) for CFD Mastery 🚀

#BodyOfInfluence #ANSYSMeshing #ANSYSTutorial ⚡ Welcome to *Session 7* of the ANSYS Meshing Masterclass! In this critical lesson, we unlock the power of the *Body of Influence (BOI)* — the secret to placing high‑quality mesh exactly where complex physics happens, even in empty fluid space. By the end of this session, you'll master: ✅ Creating BOIs in 2D and 3D cases ✅ Refining wake regions behind airfoils & vehicles ✅ Controlling mesh density without modifying CAD geometry ✅ Reducing computational cost while capturing critical flow details --- ⏱ TIMELINE: 00:00 Why key CFD physics often happens in empty space 00:07 Problem: no geometry to click for meshing 00:38 Introduction to Body of Influence (BOI) 01:02 Recap of previous sessions & the need for BOI 01:09 Example: wake region behind a car 01:23 Physics in CFD often away from body 01:47 BOI defined: virtual box, sphere, cylinder, etc. 02:02 Practical examples: 2D airfoil & 3D Ahmed body 02:31 Starting 2D airfoil case in ANSYS Meshing 03:12 Initial mesh setup, inflation layers, cell sizes 04:24 Why local sizing fails in empty regions 04:31 Switching to DesignModeler for BOI geometry 04:35 Creating independent BOI surface on XY plane 04:49 Dimensioning the BOI zone 05:02 Returning to Meshing & applying BOI sizing 07:00 Reviewing fine mesh in wake region 07:50 Transition to 3D example: Ahmed body 08:06 BOI in 3D: volumetric zone instead of surface 08:30 Creating rectangular BOI volume in DesignModeler 08:44 Extruding with "Add Frozen" to keep it separate 08:55 Applying BOI sizing (1 cm) in Meshing 09:20 Reviewing refined mesh around Ahmed body 09:45 Conclusion & emphasis on BOI’s importance in CFD --- ▶️ *Previous Sessions:* 📹 *[Session 1 – Introduction to Mesh](   • ANSYS Meshing Free Course - Session 1: Int...   📹 *[Session 2 – All Mesh Types](   • ANSYS Meshing Free Course - Session 2: All...   📹 *[Session 3 – Global Mesh Controls](   • ANSYS Meshing Free Course - Session 3: Glo...   📹 *[Session 4 - Mesh Methods (Part I)](   • ANSYS Meshing Free Course - Session 4: Mes...   📹 *[Session 5 – Sweep, Cartesian & Multi-Zone Explained! (Part II)](   • 🔥 ANSYS Meshing Course - Session 5 | Sweep...  )* 📹 *[Session 6 – Local Sizing, Sphere of Influence & Bias Control](   • 🔥 ANSYS Meshing Course – Session 6 | Local...  )* 📞 Contact CFDLAND: [email protected] | +44 7833 901310