Wall shear stress calculations in space–time finite element computation of arterial fluid–structure interactions

2009 ◽  
Vol 46 (1) ◽  
pp. 31-41 ◽  
Author(s):  
Kenji Takizawa ◽  
Creighton Moorman ◽  
Samuel Wright ◽  
Jason Christopher ◽  
Tayfun E. Tezduyar
Keyword(s):  
Finite Element ◽  
Shear Stress ◽  
Wall Shear Stress ◽  
Space Time ◽  
Fluid Structure Interactions ◽  
Fluid Structure ◽  
Element Computation ◽  
Wall Shear ◽  
Finite Element Computation

Space-time finite element computation of complex fluid-structure interactions

2010 ◽  
Vol 64 (10-12) ◽  
pp. 1201-1218 ◽  
Author(s):  
Tayfun E. Tezduyar ◽  
Kenji Takizawa ◽  
Creighton Moorman ◽  
Samuel Wright ◽  
Jason Christopher
Keyword(s):  
Finite Element ◽  
Space Time ◽  
Fluid Structure Interactions ◽  
Fluid Structure ◽  
Element Computation ◽  
Complex Fluid ◽  
Finite Element Computation

scholarly journals Numerical modeling in arterial hemodynamics incorporating fluid-structure interaction and microcirculation

2021 ◽  
Vol 18 (1) ◽  
Author(s):  
Fan He ◽  
Lu Hua ◽  
Tingting Guo
Keyword(s):  
Numerical Modeling ◽  
Shear Stress ◽  
Wall Shear Stress ◽  
Fluid Structure Interaction ◽  
Rigid Wall ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Arterial Hemodynamics ◽  
Wall Compliance ◽  
Wall Shear

Abstract Background The effects of arterial wall compliance on blood flow have been revealed using fluid-structure interaction in last decades. However, microcirculation is not considered in previous researches. In fact, microcirculation plays a key role in regulating blood flow. Therefore, it is very necessary to involve microcirculation in arterial hemodynamics. Objective The main purpose of the present study is to investigate how wall compliance affects the flow characteristics and to establish the comparisons of these flow variables with rigid wall when microcirculation is considered. Methods We present numerical modeling in arterial hemodynamics incorporating fluid-structure interaction and microcirculation. A novel outlet boundary condition is employed to prescribe microcirculation in an idealised model. Results The novel finding in this work is that wall compliance under the consideration of microcirculation leads to the increase of wall shear stress in contrast to rigid wall, contrary to the traditional result that wall compliance makes wall shear stress decrease when a constant or time dependent pressure is specified at an outlet. Conclusions This work provides the valuable study of hemodynamics under physiological and realistic boundary conditions and proves that wall compliance may have a positive impact on wall shear stress based on this model. This methodology in this paper could be used in real model simulations.

Numerical CFD / FSI Study of Teflon and Dacron for Use in the Femoral Artery Graft Procedure

2019 ◽  
Author(s):  
Sukwinder Sandhu ◽  
Kevin R. Anderson
Keyword(s):  
Shear Stress ◽  
Wall Shear Stress ◽  
Femoral Artery ◽  
Hoop Stress ◽  
Fluid Structure Interaction ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Implant Materials ◽  
Artery Graft ◽  
Wall Shear

Abstract This paper presents Fluid Structure Interaction modeling of candidate implant materials used in the femoral artery graft medical procedure. Two candidate implant materials, namely Teflon and Dacron are considered and modeled using Computational Fluid Dynamics (CFD) and structural Finite Element Analysis (FEA) to obtain Fluid Structure Interaction (FSI) developed stresses within the candidate materials as a result of non-Newtonian blood flowing in a pulsatile unsteady fashion into the femoral artery implant tube. The pertinent findings for a pulsatile velocity maximum magnitude of 0.3 m/s and period of oscillation of 2.75 sec are as follows. For the biological tissue the wall shear stress is found to be 2.15 × 104 Pa, the hoop stress is found to be 1.6 × 104 Pa. For the Teflon implant material, the wall shear stress is found to be 1.177 × 104 Pa, the hoop stress is found to be 2.2 × 104 Pa. For the Dacron implant material the wall shear stress is found to by 3.9 × 104 Pa, the hoop stress is found to be 2.17 × 104 Pa. Based upon the analysis herein the PTFE material would be recommended.

3D Quantification of Wall Shear Stress and Oscillatory Shear Index Using a Finite-Element Method in 3D CINE PC-MRI Data of the Thoracic Aorta

2016 ◽  
Vol 35 (6) ◽  
pp. 1475-1487 ◽  
Author(s):  
Julio Sotelo ◽  
Jesus Urbina ◽  
Israel Valverde ◽  
Cristian Tejos ◽  
Pablo Irarrazaval ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Shear Stress ◽  
Wall Shear Stress ◽  
Thoracic Aorta ◽  
Oscillatory Shear ◽  
Oscillatory Shear Index ◽  
Wall Shear ◽  
Element Method

scholarly journals 3D quantification of wall shear stress using finite-element interpolations from 4D flow MR data in the Thoracic Aorta

2014 ◽  
Vol 16 (S1) ◽  
Author(s):  
Julio A Sotelo ◽  
Jesus Urbina ◽  
Cristian Tejos ◽  
Israel Valverde ◽  
Daniel E Hurtado ◽  
...  
Keyword(s):  
Finite Element ◽  
Shear Stress ◽  
Wall Shear Stress ◽  
Thoracic Aorta ◽  
4D Flow ◽  
Wall Shear

Space–time SUPG finite element computation of shallow-water flows with moving shorelines

2011 ◽  
Vol 48 (3) ◽  
pp. 293-306 ◽  
Author(s):  
Shinsuke Takase ◽  
Kazuo Kashiyama ◽  
Seizo Tanaka ◽  
Tayfun E. Tezduyar
Keyword(s):  
Finite Element ◽  
Shallow Water ◽  
Space Time ◽  
Water Flows ◽  
Shallow Water Flows ◽  
Element Computation ◽  
Finite Element Computation

Space–time finite element techniques for computation of fluid–structure interactions

2006 ◽  
Vol 195 (17-18) ◽  
pp. 2002-2027 ◽  
Author(s):  
Tayfun E. Tezduyar ◽  
Sunil Sathe ◽  
Ryan Keedy ◽  
Keith Stein
Keyword(s):  
Finite Element ◽  
Space Time ◽  
Fluid Structure Interactions ◽  
Fluid Structure
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