Introduction to Computational Fluid Dynamics (CFD) Tao Xing, Shanti Bhushan and Fred Stern IIHR—Hydroscience & Engineering C. Maxwell Stanley Hydraulics Laboratory The University of Iowa 57:020 Mechanics of Fluids and Transport Processes October 5, 2010
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. 57:020 CFD Labs
3 What is CFD?
4 Why use CFD? • Analysis and Design 1. Simulation-based design instead of “build & test” More cost effective and more rapid than EFD CFD provides high-fidelity database for diagnosing flow field 2. Simulation of physical fluid phenomena that are difficult for experiments Full scale simulations (e.g., ships and airplanes) Environmental effects (wind, weather, etc.) Hazards (e.g., explosions, radiation, pollution) Physics (e.g., planetary boundary layer, stellar evolution) • Knowledge and exploration of flow physics
5 Where is CFD used?•Where is CFD used? • Marine • Oil & Gas • Power Generation • Sports Temperature and natural convection currents in the eye following laser heating. Automotive
6 Where is CFD used? Polymerization reactor vessel - prediction of flow separation and residence time effects. Streamlines for workstation ventilation • Where is CFD used? • Aerospacee • Automotive • Biomedical • Chemical Processing • HVAC • Hydraulics • Marine • Oil & Gas • Power Generation • Sports HVAC Chemical Processing Hydraulics
7 Where is CFD used?•Where is CFD used?Marine (movie)Sports
8 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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