RBF Morph will take part in ANSYS User Group Meeting – Italia that will be held on 22nd and 23rd of May at Gran Hotel Villa Torretta in Sesto San Giovanni (Milano).
The director of RBF Morph company will have two speeches during the Meeting, one in the fluid dynamic session and one in the mechanical session.
In the first intervention, he will be showing how the mesh morphing tool RBF Morph allows to accurately redefine the shape of the mesh exploiting adjoint sensitivity data.
In particular, two main features are now available and will be described: adjoint sculpting and adjoint preview.
In the second speech, he will present the new product of RBF Morph company, the ACT extension for ANSYS Mechanical. We will be really pleased to show for the first time how the ACT extension tool will be significantly enlarge the boundaries of analyses in the mechanical sector enjoying the successful experience matured in the CFD field.
You are warmly welcome to visit us at ANSYS booth.
Look forward to meeting you in Milano!
How to boost Fluent adjoint using RBF Morph mesh morphing
Marco Evangelos Biancolini, Corrado Groth, Andrea Cicione, Roberto Gallo
University of Rome Tor Vergata – Department of Enterprise Engineering
Abstract
Adjoint solver technology looks as one of the most promising tool for CFD development. And the current adjoint implementation embedded in Fluent 15 is today one of the most performing and reliable one.
Adjoint sensitivity data allows to predict the effect of the position of each node of the calculation mesh on an observed quantity (that could be a pressure drop a drag force or a complex function defined by the user).
This means that the user can understand what areas have to be updated to obtain the maximum benefit.Mesh morphing tool RBF Morph allows to accurately redefine the shape of the mesh and it has been coupled to the adjoint technology to fully exploit the potential of obtained sensitivity.
Two main features are now available: adjoint sculpting and adjoint preview. Adjoint sculpting allows to use sensitivity data obtained at the end of an adjoint run.
RBF Morph can interact with the morphing box of the adjoint module so that shape information can be captured and used in a standard RBF Morph set-up.
Several shapes (different portion of the model) can be captured in the same session and imposed enabling further constraints i.e. preserving details that cannot be modified.
Adjoint preview allows to compute adjoint derivatives with a respect to shape parameters imposed by the user.
Standard RBF Morph shape modifications can be used and/or shapes defined using adjoint sculpting.
The great potential is that the user can compute sensitivity with respect to an arbitrary number of design variables without any extra computational efforts.
Sensitivity can be evaluated with respect to the baseline or with respect to a different configuration produced by a given status of shape parameters (a recalculation of CFD and adjoint solutions is obviously required).
This allows to enable local optimisation workflow gradient based (as for instance the Steepest Descent Method) or to enrich DOE tables using sensitivity data.
Whatever is the workflow a key feature enabled using RBF Morph is the capability to update the CAD model of the original design into the new optimized one.
A NURBS transformation is required for this purpose and NURBS morphing is then used to generate the new geometry.
RBF Mesh Morphing ACT extension for ANSYS Mechanical
Marco Evangelos Biancolini, Corrado Groth, Tiziano Capponcelli
University of Rome Tor Vergata – Department of Enterprise Engineering
Abstract
The awarded RBF Morph add-on for ANSYS Fluent has been released in 2009.
The effectiveness of this technology has been proven by industrial and scientific applications and there is a growing interest in the extension of such a tool in other areas. RBF mesh morphing allows to provide an accurate control of surfaces and to update volume mesh accordingly with a minimum loss of quality.
The major benefits are: re-meshing noise is avoided, mesh update is faster than re-meshing, update is available even when the original CAD is not available.
The new RBF mesh morphing ACT extension is born to fit aforementioned needs. The new tool is powered by the fast RBF mesh morphing technology of RBF Morph and benefits of the smart tools of ANSYS Mechanical that allow to set-up very complex shapes just with a few mouse clicks.
The current implementation is available for ANSYS 15. The potential of the approach is demonstrated on simple models and on a complex industrial component.
