Maximum grid spacing effect on peak pressure computation using inflow turbulence generators

Mansouri, Zahra; Selvam, R. Panneer; Chowdhury, Arindam

doi:10.1016/j.rineng.2022.100491

Cited by 10 publications

(4 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Skewness of produced grid is within acceptable limit. The inflow boundary condition is chosen regardless of the largest grid spacing size, it leads to spurious pressure production in the domain (Mansouri et al 2022a ) To preserve computational time, size of grid in the centre of vessel is higher than other segments since less variation happens in these regions. For using the deformations, the sac section area (red volume) is split.…”

Section: Methodsmentioning

confidence: 99%

Influence of stent-induced vessel deformation on hemodynamic feature of bloodstream inside ICA aneurysms

Sabernaeemi

Gerdroodbary

Salavatidezfouli

et al. 2023

Biomech Model Mechanobiol

View full text Add to dashboard Cite

One of the effective treatment options for intracranial aneurysms is stent-assisted coiling. Though, previous works have demonstrated that stent usage would result in the deformation of the local vasculature. The effect of simple stent on the blood hemodynamics is still uncertain. In this work, hemodynamic features of the blood stream on four different ICA aneurysm with/without interventional are investigated. To estimate the relative impacts of vessel deformation, four distinctive ICA aneurysm is simulated by the one-way FSI technique. Four hemodynamic factors of aneurysm blood velocity, wall pressure and WSS are compared in the peak systolic stage to disclose the impact of defamation by the stent in two conditions. The stent usage would decrease almost all of the mentioned parameters, except for OSI. Stenting reduces neck inflow rate, while the effect of interventional was not consistent among the aneurysms. The deformation of an aneurysm has a strong influence on the hemodynamics of an aneurysm. This outcome is ignored by most of the preceding investigations, which focused on the pre-interventional state for studying the relationship between hemodynamics and stents. Present results show that the application of stent without coiling would improve most hemodynamic factors, especially when the deformation of the aneurysm is high enough.

show abstract

Section: Methodsmentioning

confidence: 99%

Influence of stent-induced vessel deformation on hemodynamic feature of bloodstream inside ICA aneurysms

Sabernaeemi

Gerdroodbary

Salavatidezfouli

et al. 2023

Biomech Model Mechanobiol

View full text Add to dashboard Cite

show abstract

“…Therefore, turbulence's effects on the wind flow will be initiated using turbulence modeling methods, namely, Large Eddy Simulation (LES). LES is a reliable and applicable than other turbulence modeling methods (Mansouri et al, 2022).…”

Section: Model Validationmentioning

confidence: 99%

“…Increasing population densities and expanding development into extreme wind-prone regions, such as coastlines, will increase the likelihood that structures will continue to encounter extreme wind events. In addition, wind hazard has a higher risk compared to the past, and it is expected to increase more in the future (Mansouri et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic mitigation of low-rise building with complex roof geometry

Al-Chalabi,

Elshaer

2023

Front. Built Environ.

View full text Add to dashboard Cite

During strong wind events, building roofs are subjected to high wind uplift forces (suctions), which often lead to severe roofing component damage, or even roof total failure, flying debris, and water intrusion, hence, interior damages. Typical roof shapes (e.g., gable and hip) are generally designed using provision codes and standards to accurately estimate peak load impacting the roofs during wind events for design purposes. Complex roof geometry can be efficiently examined using wind tunnel testing and computational modeling to provide quantitative assessment for wind to narrow down the design alternatives and to examine the improvement gained from mitigation techniques. In this study, an isolated low-rise building with a complex roof shape is examined using large eddy simulation (LES) to numerically assess wind load prediction by validating it with wind tunnel results. This study presents two roof modification scenarios using parapets added to roof corners and ridgelines to displace the flow from the separation locations to reduce the wind impact on the roof. The current study aims to 1) evaluate wind load on an isolated low-rise building with complex roof geometry for various angles of attack and 2) mitigate the roof aerodynamically using parapets, added corners, and ridgeline to reduce the wind impact on the roof. The validation shows that both the mean and RMS of the pressure coefficients are in good agreement with the wind tunnel results. The research results suggest that parapets with 500 mm height located at the corner and edges of complex roof geometry can effectively reduce extreme corner suction by 29% and roof uplift by 5.6%.

show abstract

“…Simple algorithm is used for solving of governing equations [31][32][33][34] . This algorithm is efficient method for the flow stream with lo velocity and viscous flow [35][36][37][38][39] . Due to the pulsatile flow of blood, simulations are done for three cardiac cycles, and the inlet and outlet velocity profile is applied as presented in Fig.…”

mentioning

confidence: 99%

Computational study of blood flow inside MCA aneurysm with/without endovascular coiling

Sadeh

Kazemi

Bahramkhoo

et al. 2023

Sci Rep

View full text Add to dashboard Cite

The simulation of blood hemodynamics inside the MCA aneurysm is done to investigate the potential region for rupture and hemorrhage. The main focus of this work is to disclose the impacts of endovascular coiling on blood hemodynamics and the risk of aneurysm rupture. Navier–stokes equations are solved for the computational study of blood flow while it is assumed that flow remains laminar, unsteady, and non-Newtonian. Influences of blood hematocrits and coiling porosity are also examined in this work. Obtained results show that impacts of blood hematocrit on the maximum OSI are limited in the MCA case.

show abstract

Maximum grid spacing effect on peak pressure computation using inflow turbulence generators

Cited by 10 publications

References 18 publications

Influence of stent-induced vessel deformation on hemodynamic feature of bloodstream inside ICA aneurysms

Influence of stent-induced vessel deformation on hemodynamic feature of bloodstream inside ICA aneurysms

Aerodynamic mitigation of low-rise building with complex roof geometry

Computational study of blood flow inside MCA aneurysm with/without endovascular coiling

Contact Info

Product

Resources

About