Journal of the Korean Society of Visualization (한국가시화정보학회지)

The Korean Society of Visualization (한국가시화정보학회)
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Evolution of Low Wall-Shear Stress Area in Anterior Communicating Artery Aneurysm

전교통동맥류 내부 유동 전산해석을 통한 낮은 벽면 전단 응력 영역 발달 분석

  • Guk, Yoonhyeok (School of Mechanical Engineering, Pusan National University) ;
  • Kwon, Taeho (School of Mechanical Engineering, Pusan National University) ;
  • Moon, Seongdeuk (School of Mechanical Engineering, Pusan National University) ;
  • Kim, Dongmin (School of Mechanical Engineering, Pusan National University) ;
  • Hwang, Jinyul (School of Mechanical Engineering, Pusan National University) ;
  • Bae, Youngoh (Department of Neurosurgery, Kangbuk Samsung Hospital, Sungkyunkwan University)
  • Received : 2022.06.21
  • Accepted : 2022.07.19
  • Published : 2022.07.31
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Abstract

We analyzed the low wall-shear stress area in the intracranial aneurysm that occurred at an anterior communicating artery with a special emphasis on vortical structures close to the wall. We reconstructed the aneurysm model from patient CTA data. We assumed blood as an incompressible Newtonian fluid and treated the blood vessel as a solid wall. The pulsatile boundary condition was applied at the inlet of the anterior cerebral artery. From the instantaneous flow field, we computed the histogram of the wall-shear stress over the aneurysm wall and found the low wall-shear stress event (< 0.4 Pa). This extreme event was due to the low wall-shear stress area that occurred at the daughter sac. We found that the merging of two vortices induced the low wall-shear stress area; one arises from the morphological characteristics of the daughter sac, and the other is formed by a jet flow into the aneurysm sac. The latter approaches the daughter sac, which ultimately leads to the strong ejection event near the daughter sac.

Keywords

Acknowledgement

이 과제는 부산대학교 기본연구지원사업(2년)에 의하여 연구되었음.

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