Calculation of flow - field in abdominal aorta

Aneurizma abdominalne aorte (AAA) predstavlja zdravstveni problem relativno male učestalosti, ali s velikom incidencijom smrtnih posljedica. Točan uzrok i sam razvoj AAA još uvijek nije objašnjen, a većina aneurizama dijagnosticira se slučajno. Otkriju se pri fizikalnom pregledu ili na ultrazvuku, CT–u ili MR–u trbuha vršenim zbog drugih razloga. Zbog prethodno navedenih razloga, AAA je predmet brojnih znanstvenih istraživanja u zadnjih nekoliko godina. U skladu sa sve većim mogućnostima računala, ali i razvojem novih algoritama za numeričku analizu fizikalnih problema, numeričke metode u strojarstvu kao što su Metoda konačnih elemenata (MKE ) i Metoda konačnih volumena (MKV) sve više se počinju primjenjivati u području biomehanike i bioloških strujanja. Tako će tema ovog rada biti upravo numeričko modeliranje i simulacija strujanja krvi kroz abdominalnu aortu. Sam proračun je proveden za više geometrijskih modela primjenom metode konačnih volumena, pomoću programskog paketa OpenFOAM. Ukupno je analizirano pet geometrijskih modela koji odražavaju povijest geometrije aorte prilikom nastanka aneurizme.Abdominal aortic aneurysm (AAA) is a health problem of relatively low frequency, but with a high incidence of fatal consequences. The exact cause and development of AAA is still unexplained, and most of the aneurysms are diagnosed by accident. They are detected at physical examination or on ultrasound, CT scans of MRI of the abdomen exercised for other reasons. Because of the foregoing reasons, AAA is the subject of numerous scientific studies in the last few years. In line with the increasing capabilities of computers, but also the development of the new algorithms for numerical analysis of physical problems, numerical methods in engineering such as Finite element method (FEM) and Finite volume method (FVM) are being applied more and more in the field of bio mechanics and biological fluid mechanics. Thus, the topic of this work is numerical modelling and simulation of the blood flow through abdominal aorta. The calculation itself is carried out for five geometric models using finite volume method, with use of OpenFOAM. The calculation covers five geometric models which reflect the history of the geometry of the aorta during the formation of aneurysm