Introduction to Computational Fluid DynamicsInstructor: Dmitri KuzminInstitute of Applied MathematicsUniversity of Dortmund[email protected]Fluid (gas and liquid) flows are governed by partial differential equations whichrepresent conservation laws for the mass, momentum, and energy.Computational Fluid Dynamics (CFD) is theartof replacing such PDE systemsby a set of algebraic equations which can be solved using digital computers.∼kuzmin/cfdintro/cfd.html
What is fluid flow?
What is CFD?
Why use CFD?Numerical simulations of fluid flow (will) enable•architects to design comfortable and safe living environments•designers of vehicles to improve the aerodynamic characteristics•chemical engineers to maximize the yield from their equipment•petroleum engineers to devise optimal oil recovery strategies•surgeons to cure arterial diseases (computational hemodynamics)•meteorologists to forecast the weather and warn of natural disasters•safety experts to reduce health risks from radiation and other hazards•military organizations to develop weapons and estimate the damage•CFD practitioners to make big bucks by selling colorful pictures :-)
Examples of CFD applicationsAerodynamic shape design
Examples of CFD applicationsCFD simulations by L¨ohner et al.
Examples of CFD applicationsSmoke plume from an oil fire in BaghdadCFD simulation by Patnaik et al.
Experiments vs. SimulationsCFD gives an insight into flow patterns that are difficult, expensive or impossibleto study using traditional (experimental) techniquesExperimentsSimulationsQuantitativedescriptionof flowQuantitativepredictionof flowphenomena using measurementsphenomena using CFD software•for one quantity at a time•at a limited number of pointsand time instants•for a laboratory-scale model•for a limited range of problemsand operating conditions•for all desired quantities•with high resolution inspace and time•for the actual flow domain•