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Unformatted text preview: Introduction to Computational Fluid Dynamics (CFD) Tao Xing, Shanti Bhushan and Fred Stern IIHRHydroscience & Engineering C. Maxwell Stanley Hydraulics Laboratory The University of Iowa 57:020 Mechanics of Fluids and Transport Processes http://css.engineering.uiowa.edu/~fluids/ 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? CFD is the simulation of fluids engineering systems using modeling (mathematical physical problem formulation) and numerical methods (discretization methods, solvers, numerical parameters, and grid generations, etc.) Historically only Analytical Fluid Dynamics (AFD) and Experimental Fluid Dynamics (EFD). CFD made possible by the advent of digital computer and advancing with improvements of computer resources (500 flops, 1947 20 teraflops, 2003 1.3 pentaflops, Roadrunner at Las Alamos National Lab, 2009.) 4 Why use CFD? Analysis and Design 1. Simulationbased design instead of build & test More cost effective and more rapid than EFD CFD provides highfidelity 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? 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 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? 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 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...
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 Fall '10
 FredrickStern
 mechanics

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