Investigation on the flow structure in the aortic vessel for patients having an aortic aneurysm and having COVID-19

When medical imaging software and engineering programs are used in cooperation with each other, they will play an essential role in patients' treatments. This thesis is an investigation on the flow structure of the aorta, the main artery originating from the heart, in patients who have undergone thoracic aortic surgery with a diagnosis of thoracic aortic aneurysm and patients diagnosed with covid-19 as a fundamental effort to assess the adequacy of numerical simulation for this area of research. The deformation on aorta walls and velocity profiles at different times in the vessels have been modeled using the ANSYS-Fluent which is a computational fluid dynamic program (CFD). The highest velocity value has been acquired as 0.86 m/s where the vessel is repaired for the patient that undergone the surgery whereas it has been 1.135 m/s at the entrance and exit part of the covid-affected patient's aorta. The maximum pressure has been found at 13380 Pa in the repaired aorta while 14430 Pa in the aorta affected by the covid-19. On the other hand, wall shear stress results are found to be around 20 Pa for the patient affected by covid-19 but a maximum of 6.02 Pa for the patient having repaired vessel. In addition, it is observed that the change in cell volume is not at a level that would cause a problem for the two vessels examined, it occurred between 1.3% and 3%. When the analysis results of these 2 vessels were investigated in general, it was seen that most of the hemodynamic values were higher in the covid-19 infected patient.