Brochures

Industry Solutions R E L E A S E 1 3 . 0 Flow velocities on the free surface water flow across a dam with a sluice, showing hydraulic jump just past the base A precessing vortex core colored by axial velocity in an SAS simulation of a combustion chamber Courtesy of German Aerospace Center (DLR) Institute of Combustion Technology. The flow through a screw pump simulated using the immersed solid technology to capture the motion of the rotors Multiphase: More than two decades of experience in multiphase model- ing is incorporated into ANSYS CFX software, to allow the simulation of multiple fluid streams, bubbles, droplets, particles and free surface flows. The Lagrangian transport model allows the solution of one or more discrete particle or droplet phases within a continuous fluid phase. Break- up models are available to describe both the initial fluid atomization and further fragmentation due to the action of external forces. Further options include an efficient statistical particle-particle collision model and a quasi-static wall film model. The Eulerian multiphase model incorpo- rates a wealth of options to capture the exchange of momentum, energy and mass, including numerous drag and non-drag force models as well as robust models for phase change due to cavitation, evaporation, condensa- tion and boiling. The multiple size group (MUSIG) model is available to simulate the breakup and coalescence of disperse phases in poly-dispersed multi-phase flows. Heat Transfer and Radiation: Beyond solving the convective transport of energy by fluid flow, ANSYS CFX software includes a conjugate heat transfer (CHT) capability to solve the thermal conduction in solids. It also incorporates a wealth of models to capture all types of radiative heat exchange in and between fluids and solids, whether these are fully or semitransparent to radiation or opaque. Combustion: Whether simulating combustion design in gas turbines, automotive engines or coal-fired furnaces, or assessing fire safety in and around buildings and other structures, ANSYS CFX software provides a rich framework to model chemical reactions and combustion associated with fluid flow. Combustion models are provided for anything from laminar to turbulent flows, fast to slow chemical kinetics and non- to partially or fully pre-mixed reactants. A rich library of predefined chemical reactions that can be easily edited and extended by users, as well as the integration of the flamelet library generator ANSYS CFX-RIF for detailed chemistry tables, provides a complete range of options for all situations. These are rounded out with models for auto and spark ignition, pollutant formation (NOx, soot), residual exhaust gases, knock, wall quenching, flame extinction and more. Fluid Structure Interaction (FSI): ANSYS combines the specialized capabilities and technology of its leading fluid dynamics and structural mechanics software to provide the most advanced capability for the simulation of the interaction between fluids and solids. Both one-way and two-way FSI simulations are possible, from problem setup to post-process- ing, all within the ANSYS Workbench environment. The native two-way connection to structural analysis technologies from ANSYS allows users to capture even the most complex FSI problems without the need to pur- chase, administer or configure third-party coupling software. Moving Mesh, Remeshing and Immersed Solids: Beyond the powerful range of options for capturing FSI together with ANSYS structural analysis technologies many additional options exist directly within ANSYS CFX software to model the effect of solid motion on fluid flow. Mesh deforma- tion technology used in FSI simulations to allow large ranges of motion with a fixed mesh topology can be combined with external remeshing to capture even the most complex geometry movement. This motion can be either prescribed, such as the valve and piston motion in an internal

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