Intro.pptx - Mechanical Engineering MVGR Introduction to Computational Fluid Dynamics(CFD Md Yousuf Ali 1 Computational Fluid Mechanical Engineering

Intro.pptx - Mechanical Engineering MVGR Introduction to...

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Mechanical Engineering MVGR Computational Fluid Dynamics 1 Introduction to Computational Fluid Dynamics (CFD) Md Yousuf Ali
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Mechanical Engineering MVGR Computational Fluid Dynamics 2 Outline 1. What, why and where of CFD? 2. Modeling 3. Numerical methods 4. Types of CFD codes 5. CFD Educational Interface 6. CFD Process 7. Example of CFD Process 8. CFD Labs
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Mechanical Engineering MVGR Computational Fluid Dynamics 3 Where is CFD used? Where is CFD used? Aerospace Automotive Biomedical Chemical Processing HVAC Hydraulics Marine Oil & Gas Power Generation Sports F18 Store Separation Temperature and natural convection currents in the eye following laser heating. Aerospace Automotive Biomedical
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Mechanical Engineering MVGR Computational Fluid Dynamics 4 Where is CFD used? Where is CFD used? Aerospacee Automotive Biomedical Chemical Processing HVAC Hydraulics Marine Oil & Gas Power Generation Sports Polymerization reactor vessel - prediction of flow separation and residence time effects. Streamlines for workstation ventilation HVAC Chemical Processing Hydraulics
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Mechanical Engineering MVGR Computational Fluid Dynamics 5 Where is CFD used? Where is CFD used? Aerospace Automotive Biomedical Chemical Processing HVAC Hydraulics Marine Oil & Gas Power Generation Sports Flow of lubricating mud over drill bit Flow around cooling towers Marine (movie) Oil & Gas Sports Power Generation
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Mechanical Engineering MVGR Computational Fluid Dynamics 6 Modeling Modeling is the mathematical physics problem formulation in terms of a continuous initial boundary value problem (IBVP) IBVP is in the form of Partial Differential Equations (PDEs) with appropriate boundary conditions and initial conditions. Modeling includes : 1. Geometry and domain 2. Coordinates 3. Governing equations 4. Flow conditions 5. Initial and boundary conditions 6. Selection of models for different applications
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Mechanical Engineering MVGR Computational Fluid Dynamics 7 Modeling (geometry and domain) Simple geometries can be easily created by few geometric parameters (e.g. circular pipe) Complex geometries must be created by the partial differential equations or importing the database of the geometry(e.g. airfoil) into commercial software Domain : size and shape Typical approaches Geometry approximation CAD/CAE integration: use of industry standards such as Parasolid, ACIS, STEP, or IGES, etc. The three coordinates: Cartesian system (x,y,z), cylindrical system (r, θ, z), and spherical system(r, θ, Φ) should be appropriately chosen for a better resolution of the geometry (e.g. cylindrical for circular pipe).
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Mechanical Engineering MVGR Computational Fluid Dynamics 8 Modeling (coordinates) x y z x y z x y z (r, ,z) z r (r, , ) r (x,y,z) Cartesian Cylindrical Spherical General Curvilinear Coordinates General orthogonal Coordinates
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Mechanical Engineering MVGR Computational Fluid Dynamics 9
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