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Aortic Bifurcation

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Wen-jei Yang – One of the best experts on this subject based on the ideXlab platform.

  • A computer simulation of the blood flow at the Aortic Bifurcation with flexible walls
    Journal of biomechanical engineering, 1993
    Co-Authors: Zheng Lou, Wen-jei Yang

    Abstract:

    To understand the role of fluid dynamics in atherogenesis, especially the effect of the flexibility of arteries, a two-dimensional numerical model for blood flow at the Aortic Bifurcation with linear viscoelastic walls is developed. The arbitrary Lagrangian-Eulerian method is adopted to deal with the moving boundary problem. The wall expansion induces flow reversals or eddies during the decelerating systole while the wall contraction restricts them during the diastole. A flexible Bifurcation experiences the shear stresses about 10 percent lower than those of a rigid one.

  • A COMPUTER SIMULATION OF THE NON-NEWTONIAN BLOOD FLOW AT THE Aortic Bifurcation
    Journal of biomechanics, 1993
    Co-Authors: Zheng Lou, Wen-jei Yang

    Abstract:

    A two-dimensional numerical model was developed to determine the effect of the non-Newtonian behavior of blood on a pulsatile flow at the Aortic Bifurcation. The blood rheology was described by a weak-form Casson equation. The successive-over-relaxation (SOR) method was used to solve both the vorticity and Poisson equations numerically. It was disclosed that the non-Newtonian property of blood did not drastically change the flow patterns, but caused an appreciable increase in the shear stresses and a slightly higher resistance to both flow separations and the phase shifts between flow layers.

  • A Computer Simulation of the Blood Flow at the Aortic Bifurcation with Flexible Walls
    , 1991
    Co-Authors: Zheng Lou, Wen-jei Yang

    Abstract:

    To understand the possible role of hemodynamics in the atherogenesis, especially the effect of the flexibility of the arteries, a two-dimensional numerical model for the blood flow at the Aortic Bifurcation with linear viscoelastic walls has been developed. The arbitrary Lagrangian-Eulerian method was used to deal with the moving boundaries. The successive-over-relaxation method was used to solve both the vorticity and Poisson equations. A flexible Bifurcation experienced the shear stresses about 10% lower than those by a rigid one.

Zheng Lou – One of the best experts on this subject based on the ideXlab platform.

  • A computer simulation of the blood flow at the Aortic Bifurcation with flexible walls
    Journal of biomechanical engineering, 1993
    Co-Authors: Zheng Lou, Wen-jei Yang

    Abstract:

    To understand the role of fluid dynamics in atherogenesis, especially the effect of the flexibility of arteries, a two-dimensional numerical model for blood flow at the Aortic Bifurcation with linear viscoelastic walls is developed. The arbitrary Lagrangian-Eulerian method is adopted to deal with the moving boundary problem. The wall expansion induces flow reversals or eddies during the decelerating systole while the wall contraction restricts them during the diastole. A flexible Bifurcation experiences the shear stresses about 10 percent lower than those of a rigid one.

  • A COMPUTER SIMULATION OF THE NON-NEWTONIAN BLOOD FLOW AT THE Aortic Bifurcation
    Journal of biomechanics, 1993
    Co-Authors: Zheng Lou, Wen-jei Yang

    Abstract:

    A two-dimensional numerical model was developed to determine the effect of the non-Newtonian behavior of blood on a pulsatile flow at the Aortic Bifurcation. The blood rheology was described by a weak-form Casson equation. The successive-over-relaxation (SOR) method was used to solve both the vorticity and Poisson equations numerically. It was disclosed that the non-Newtonian property of blood did not drastically change the flow patterns, but caused an appreciable increase in the shear stresses and a slightly higher resistance to both flow separations and the phase shifts between flow layers.

  • A Computer Simulation of the Blood Flow at the Aortic Bifurcation with Flexible Walls
    , 1991
    Co-Authors: Zheng Lou, Wen-jei Yang

    Abstract:

    To understand the possible role of hemodynamics in the atherogenesis, especially the effect of the flexibility of the arteries, a two-dimensional numerical model for the blood flow at the Aortic Bifurcation with linear viscoelastic walls has been developed. The arbitrary Lagrangian-Eulerian method was used to deal with the moving boundaries. The successive-over-relaxation method was used to solve both the vorticity and Poisson equations. A flexible Bifurcation experienced the shear stresses about 10% lower than those by a rigid one.

Seok Hyun Kim – One of the best experts on this subject based on the ideXlab platform.

  • vertical distance between umbilicus to Aortic Bifurcation on coronal view in korean women
    Obstetrics & gynecology science, 2014
    Co-Authors: Joo Jeong, Seok Hyun Kim, Yeo Rang Kim, Ju Yeong Kim, Byung Chul Jee

    Abstract:

    2 ) were also recorded. Results Aortic Bifurcation was located caudal to umbilicus in 52.9% and cephalad to umbilicus in 37.4%. The vertical distance had a negative relationship with BMI (r=−0.180, P=0.004), as well as woman’s age (r=−0.382, P<0.001). However, a multivariate analysis revealed that the vertical distance had a significant negative relationship with woman's age (P<0.001) but not with BMI (P=0.510). An equation could be drawn to estimate the vertical distance by using woman's age and BMI: vertical distance (mm)=12.6−0.3×(age)−0.2×(BMI).