Mesh Morphing in Computational Fluid Dynamics and Fluid-Structure Interaction Comparison in Ascending Thoracic Aortic Aneurysms
Please login to view abstract download link
Aneurysms on the Ascending Thoracic Aorta (ATAA) result from the prolonged expansion of the vessel due to factors such as ageing and genetics. The European Society of Cardiology's guidelines classify ATAA as a 50% increase in diameter, with surgical intervention recommended when surpassing a 55 mm threshold. Notably, 60% of patients experiencing aortic complications had diameters below the surgical limit, emphasizing the significance of considering interventions at a threshold lower than currently recommended. Computational Fluid Dynamics (CFD) models for exploring the hemodynamics of ATAA have undergone iterative enhancements through the integration and development of Fluid-Structure Interaction (FSI) techniques [1], allowing to address ATAA wall deformation. However, these techniques need to be improved when incorporating the impact of ATAA motion. This paper investigates the augment of CFD models by using patient-specific mesh morphology on ATAA hemodynamics. This allows to derive conclusive insights into the significance of incorporating patient-specific wall motion in the form of mesh morphing, to attain a more exhaustive comprehension of ATAA hemodynamics. The study employs a thorough comparative examination of the two CFD and FSI models [2]. This investigation holds importance in establishing the relevance of considering not only wall deformation and patient-specific boundary conditions but also the intricate motion of the patient-specific aorta to enhance the precision and applicability of CFD models in ATAA research.
