Large Eddy Simulations of blood dynamics in abdominal aortic aneurysms
Keywords
Computational Medicine for the Cardiocirculatory System
Code:
54/2016
Title:
Large Eddy Simulations of blood dynamics in abdominal aortic aneurysms
Date:
Tuesday 13th December 2016
Author(s):
Vergara, C.; Le Van, D.; Quadrio, M.; Formaggia, L.; Domanin, M.
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Abstract:
In this work we address the study of transition to turbulence effects
in abdominal aortic aneurysms (AAA). The formation of transitional ef-
fects in such districts is caused by the heart pulsatility and the sudden
change of diameter, and has been recorded by means of clinical measures
and computational studies. Here we propose, for the first time, the use
of a large eddy simulation (LES) model to describe transition to turbu-
lence in realistic scenarios of AAA obtained from radiological images. To
this aim, we post-process the obtained numerical solutions to produce sig-
nificant quantities, such as the ensemble-averaged velocity and wall shear
stress, the standard deviation of the velocity field, the Q-criterion. The
results show the suitability of the considered LES model and the presence
of significant transitional effects during the mid-deceleration phase around the impingement region.