Ansys Fluent R Michele Andreoli

Transcription

1 Ansys Fluent R 17.0 Michele Andreoli (m.andreoli@enginsoft.it)

2 Table of contents User Interface Fluent Meshing Solver Numerics New features Innovative Solutions

3 New User Interface: Ribbon-Driven Solver Workflow Ribbon: Access primary workflow Tree: Access model particulars and shortcuts

4 New User Interface: Ribbon-Driven Solver Workflow

5 New User Interface

6 Fluent Meshing Display/Selection controls Movable Icon Sets Common Icons with solver Operation Icons Highlight entities

7 Native Polyhedral Meshing Polyhedral mesh requires initial tet mesh generation and then polyhedral mesh conversion in the Fluent solver. Can be complicated, time consuming and result in too many small mesh cells Create native polyhedral mesh Advantages: 2-3 times less memory 2-3 times faster

8 Solver Accuracy New settings for a better convergence and robustness for typical industrial cases Equations Conservative Coarsening (poly and highly stretched cells) Reordering of the AMG solver Mesh Quality Warped-Face Gradient Correction No reordering RCM reordering WFGC

9 New features Overset Mesh Method Customers expect to be able to simulate complex geometries where components of the geometry are moving relative to one another. Overset mesh problems can be set up and solved for: Steady and transient (fixed mesh), 3-D and 2-D planar Pressure-based coupled solver Incompressible density method Single-phase or VOF multiphase Heat transfer k-epsilon and SST k- models BETA in 17.0: Moving mesh, compressible flow, VOF with surface tension, pressure-far-field BC, Workbench support, pressurebased segregated algorithms.

10 Turbulence/Acoustics Hybrid RANS-LES models Shielded Detached Eddy Simulation (SDES) New shielding function for DES models Much improved shielding under grid refinement Shielding function which dissolves under LES conditions Improved definition of mesh length scale and calibration Stress Blended Eddy Simulation (SBES) Based on SDES shielding function, switch from selected RANS model to selected LES model Provide shielding function to clearly define/show regions of RANS and regions of LES

11 Acoustics Axial Fan

12 Fluent Addon Modules

13 Fluent Reacting Flow Enhancements CHEMKIN-CFD Solver can now be used with no additional license Full compatibility with CHEMKIN mechanisms Dynamic Cell Clustering with CHEMKIN-CFD offers significant speed-up for detailed chemistry Chemkin-CFD_DCC R17-DI-CA R17-DI ODE_solver Iterative_Solver

14 Fluent Offshore/Marine VOF Segregated Velocity Inputs for primary and secondary phases and moving object for Open Channel BC Multi-directional numerical beach Fenton Wave Theory for Open-Channel Flows Improved accuracy for steep waves for which earlier implementations would predict premature breaking Old New

15 From the comprehensive analysis to innovative solutions Design Exploration Mesh Morpher Optimizer Adjoint Solver Streamlined workflow of entire simulation using Workbench Multi-Physics Deterministic and Probabilistic analysis Can be coupled with RBF Morph to include morphing Standalone Mesh Morpher based on Free Form Deformation Approach Coupled Mesh Morpher with Non-Gradient Based Optimization Methods Full Fluent Model Support One tool no additional license Comprehensive design space Detailed sensitivity analysis Innovative solutions by gradient based shape optimization Can be coupled with RBF Morph for advanced morphing One tool no additional license Parameter Based Parameter Free Innovative Design

16 Shape Optimization Optimization without Morphing Optimization with morphing

17 How to increase life time of a manifold? Goal: Decrease pressure loss in a pipe or manifold. Design Space Challenges: Time. Limited Resources. Complex Environments. Porous media Outcome: Improved overall performance. Life time improvement. Pressure loss decreased by 12%.

18 Adjoint Solver

19 ANSYS Solution for Erosion Modeling Different particulate modeling options DPM, DDPM, DEM, Eulerian-Granular Wide Varieties of Erosion Models are available in ANSYS FLUENT FLUENT s Default Erosion Model Mclaury et. Al Erosion Model Salama & Venkatesh Erosion Model Tulsa Erosion Model DNV Erosion Model Erosion Model based on Wall Shear Stress Flexibility to incorporate any erosion model Contours of Erosion Rate Erosion pattern in complex flows and geometries can be predicted with a good accuracy

20 Thanks for you attention