Author(s)

M. Podyma, I. Zbicinski, J. Walecki, M. L. Nowicki, P. Andziak, P. Makowski & L. Stefanczyk

Abstract

A CFD model of flow hemodynamics in abdominal aortic aneurysm to estimate the effect of four different flow conditions on velocity and pressure profiles was developed and verified. The reconstruction of blood flow domain geometry was performed on the basis of CT examination. Our own software was used for CT image segmentation and real blood flow domain geometry reconstruction. Data necessary for determination of initial and boundary conditions as well as for verification of developed CFD model were collected from USG-Doppler examinations at 4 characteristic areas of the abdominal aorta. The result of these calculations proved that, irrespective of the applied boundary conditions and flow type, velocity profiles in all of the analysed models were similar. The comparison of theoretical and experimental results showed a significant difference in the absolute values of both velocities and heart-work period length. The reasons for the discrepancies were analyzed indicating both numerical factors and the character and accuracy of the USG examination. Keywords: numerical simulation, verification of CFD model, hemodynamics, segmentation, CT, USG-Doppler.

Keywords

numerical simulation, verification of CFD model, hemodynamics, segmentation, CT, USG-Doppler.