An Integrated System for Shape Optimization in ANSYS Fluent

1. An Integrated System for Shape Optimization in ANSYS Fluent

2. The Proposed Product • The aim of the product is to allow the study of shape optimization entirely within ANSYS Fluent • This new approach takes advantage of the ANSYS Fluent’s CFD technology and overcomes the limits of the mainstream methods, by introducing these functionalities through the implementation of dedicated routine in the CFD ANSYS Fluent code • A dedicated Graphical User Interface (GUI) has been developed and integrated in ANSYS Fluent • The product is CFD users oriented and does not require the knowledge of other software packages.

3. PRE - PROCESSING CAD CAD GEOMETRY GEOMETRY New: The product allows to perform morphing (mesh could be modified) directly inside the ANSYS Fluentcode without rebuilding the geometry and the mesh with an external tool PRE - PROCESSING PRE - PROCESSING MODEL AND BOUNDARY MODEL AND BOUNDARY CONDITIONS SETTING CONDITIONS SETTING OPTIMIZATION OPTIMIZATION ALGORITHM ALGORITHM INITIALIZATION INITIALIZATION MORPHING FLUIDYNAMIC PROBLEM FLUIDYNAMIC SOLUTION PROBLEM SOLUTION POST - PROCESSING POST - PROCESSING Our Strategy Mainstreamstrategy New strategy

4. Product Features (1) • Morphing directly inside the ANSYS Fluent code without rebuilding the geometry with a different software • Modification of the original mesh surfaces by: • smooth reshape • rigid movements • rescale • High quality smoothing of internal mesh (volume) • Mesh characteristics are preserved (element type and distribution, prism layers, etc) • Mesh consistent approach • Parallel calculation (million of cells are easily managed)

5. Product Features (2) • Internal smoothing is achieved by means of a mesh-less approach that is independent from the internal mesh structure handling without problems every type of mesh elements, like tetrahedral, hexahedral, hex-core and polyhedral meshes, prism and boundary layers, mesh with non-conformal interfaces • Multi-parameter and multi-step problems • Multi-configuration runs are possible as well as parallel runs for different configurations • Available for steady and transient cases • Pre and Post Processing entirely inside ANSYS Fluent

6. Product Strengths • Moving parts and deforming parts are easily managed by the proposed tool • Parametric analyses are easily conducted without preparing a new CFD model • Mesh consistency (mesh dependency problems are removed because mesh structure and sizes are preserved) • High efficiency • ANSYS Fluent users oriented • No other software knowledge is required • Projects time and cost reduction and speed up of products development and optimization

7. Custom GUI in ANSYS Fluent software edited with scheme language Custom GUI in ANSYS Fluent software edited with scheme language Graphical User Interface

8. Example of application (1) Problem: Pipe junction. Test: Rigid movement of part of the model preserving mesh quality and original surfaces shape, polyedral mesh. Goal: Optimise the position of inlet duct without rebuilding a new model.

9. Example of application (2) Problem: Flexible pipes branching. Test: Deformation for polyedrical mesh. Goal: Minimize the pressure losses at branching point.

10. Example of application (3) Problem: Hemisferical shell deformations obtained by applying a local load. Test: Single Point deformation with Morpher UDF. Goal: Preservation of the mesh quality.

11. Example of application (4) Problem: Kart bodywork Test: Points deformation with Morpher UDF Goal: Aerodynamic optimization Morphing action Cx=0.16 Cx=0.15 Time to allow mesh deformation: 10 min to morph 2.300.000 cells on AMD Opteron workstation with 8GB of RAM

12. Contact • University of Rome Tor Vergata • Dept. Mechanical Engineering • Via del Politecnico,1 – Rome, ITALY • e-mail addr: fsi-project@torvergata-karting.it • Phone n. : +39 06 7259 7124 - Dr. Marco E. Biancolini