Apakah WinAir merupakan valid software untuk simulasi aliran angin? untuk mencari rating di Green Mark, WinAir tidak bisa memenuhi syarat ukuran grid hingga 0,2 meter (limitasi jumlah cell pada WinAir terbatas).
- Problem dimensionality: one, two and three dimensions.
- Time dependence: steady state and transient processes.
- Grid systems: Cartesian, cylindrical-polar and curvilinear co-ordinates; rotating co-ordinate systems; multi-block grids and fine grid embedding.
- Compressible/incompressible flows.
- Newtonian/non-Newtonian flows.
- Subsonic, transonic and supersonic flows.
- Flow in porous media, with direction-dependent resistances.
- Convection, conduction and radiation; conjugate heat transfer, with a library of solid materials and automatic linkage at the solid fluid interface.
- A wide range of built-in turbulence models for high and low-Reynolds number flows; LVEL model for turbulence in congested domains and a variety of K-E models, including RNG, two- scale and two-layer models.
- Multi-phase flows of three kinds with a variety of built-in interphase-transfer models:Finite-volume approach on staggered or collocated grids, with 13 choices of discretisation schemes for convection.
- Inter-penetrating continua, including turbulence and modulation;
- Particle tracking, including turbulence dispersion effects;
- Free-surface flows.
- Combustion and Nox models, with a range of diffusion and kinetically controlled models including the unique Multi-Fluid Model for turbulent chemical reaction.
- Chemical kinetics including multi-component diffusion and variable properties. Built-in interface to the CHEMKIN chemical database.
- Advanced radiation models, including surface-surface model with calculated view factors, a six-flux model and composite radiosity model for radiative heat transfer, known as IMMERSOL
- Mechanical and thermal stresses in immersed solids can be computed at the same time as the fluid flow and heat transfer.
The vast majority of industrial flows are turbulent, so ANSYS Fluent software has always placed special emphasis on providing leading turbulence models to capture the effects of turbulence accurately and efficiently.
For statistical turbulence models, ANSYS Fluent provides numerous common two-equation models and Reynolds–stress models. However, particular focus is placed on the widely tested shear stress transport (SST) turbulence model, as it offers significant advantages for non-equilibrium turbulent boundary layer flows and heat transfer predictions. The SST model is as economical as the widely used k-ε model, but it offers much higher fidelity, especially for separated flows, providing excellent answers on a wide range of flows and near-wall mesh conditions. ANSYS Fluent complements the SST model with numerous other turbulence modeling innovations, including an automatic wall treatment for maximum accuracy in wall shear and heat transfer predictions and a number of extensions to capture effects like streamline curvature.
ANSYS Fluent also has innovative capabilities for laminar-to-turbulent transitionl. Using CFD to predict the location where the laminar boundary layer becomes turbulent is critical to improving efficiency and/or longevity of equipment in turbomachinery, aerospace, marine and many other industries. The Menter–Langtry γ–θ laminar–turbulent transition model™ gives users a powerful tool to capture various types of transition mechanisms in CFD simulation.
In addition, ANSYS Fluent provides a number of scale-resolving turbulence models, such as large- and detached-eddy simulation (LES and DES) model. The development of the novel scale-adaptive simulation (SAS) model is a highlight. This model provides a steady solution in stable flow regions while resolving turbulence in transient instabilities, such as massive separation zones without an explicit grid or time-step dependency. The SAS model has shown excellent results on numerous validation cases. It provides a good option for applications in which resolution of turbulence is required.
In ANSYS Fluent, an embedded-LES (E-LES) option allows computation of an LES solution for the subdomain in which unsteady (resolved) turbulence is required for accuracy, with a RANS model used to model the rest of the flow domain. For flows were wall effects are important but cannot be captured by a full LES simulation, the wall model LES (WM-LES) model was developed.
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