Individual Research Project 02

The combined use of mesh morphing, force-feedback device and static reduced-order models for achieving real-time hemodynamic solution over geometric changes

Leonardo Geronzi – ESR 02

The objectives of the project are related the combination of efficient mesh morphing, computational dynamic reduced order models (DROMs) and haptic devices in order to manage and solve hemodynamic simulations including fluid-structure interaction over geometric changes of tissues. The combined use of the three tools is expected to allow real-time solution, visualization and feedback in view of the Digital Twin MeDiTATe is planning to build. The assessment of this approach, vis-a-vis to Digital Twin, which is the ultimate goal of MeDiTATe, will be carried out and compared to the static results of ESR01. The first part of the project will be focused on the creation of the initial geometry model and the extraction of the surface mesh dataset. The use of ANSYS/Fluent and ANSYS/Mechanical will be combined to RBF Morph and dynamic ROM Builder in order to prepare and solve a design of experiments scenario able to produce a ROM for the hemodynamic solution. In a second part, the definition and implementation of the communication with the haptic device will be addressed in order to enhance the interactive spatial creation and displacement of control points on the anatomical tissue giving a real-time force-feedback to the user. This part will be completed by the study of possible real-time interaction to the dynamic ROM to retrieve fast and reliable information about the hemodynamic simulations. The interaction is intended in two ways in order to actively update the geometry of the model and have a force-feedback (i.e. force and vibration) in order to enhance the interpretation of the results through an augmented probe (visual and haptic feedback).

Expected Results

• Numerical algorithms for combining the use of ANSYS/Fluent,ANSYS/Mechanical, RBF Morph and ANSYS Dynamic ROM Builder.

• Numerical algorithms for real-time interaction between anatomical soft tissue and the haptic device.

• Development and verification of selected test cases.

• Comparison with static ROMs (model developed by ESR1).