Effects of Brownian motions and thermophoresis diffusions on the hematocrit and LDL concentration/diameter of pulsatile non-Newtonian blood in abdominal aortic aneurysm

Abbasi, Mohammad; Esfahani, Amin Nadimian; Golab, Ehsan; Golestanian, Omid; Ashouri, Nima; Sajadi, S. Mohammad; Ghaemi, Ferial; Băleanu, Dumitru; Karimipour, Arash

doi:10.1016/j.jnnfm.2021.104576

Cited by 18 publications

(4 citation statements)

References 41 publications

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“…In Equation ( 2), μ b is the blood viscosity, p is pressure, ρ b is blood density, and γ γ is the strain rate and is calculated by the following equation [29]…”

Section: Momentum Equationmentioning

confidence: 99%

Evaluation of Energy Harvesting from Different Sections of the Aortic Artery with Several Energy Harvester Materials

Sadr

Nasri

Pourfarzad

et al. 2022

Adv Materials Technologies

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With the development of implants and microdevices used in the human body, supplying the energy of these devices is a challenge. One of the safest ways to overcome the challenge is to harvest the energy from the human body. In this study, the blood flow, wall deformation, and hemodynamic parameters of the aortic artery are evaluated based on computational fluid dynamics (CFD). Also, the artery displacement is linked to the output voltage by using Gauss’ law. The results show that for the artery under study, the proximal descending thoracic aorta (PDTA) is the best place to harvest energy, although there is the highest blood pressure on the ascending aorta (AAo) and the highest wall displacement is in the aortic arch. Part of this result depends on the morphology of the existing aortic artery. Also, the piezoelectric model of PZT‐5H harvests the most energy and polyvinylidene fluoride (PVDF) has the least, which can harvest power density of 1.34 and 1.27 × 10−3(μW/mm3) respectively.

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“…In Equation ( 2), μ b is the blood viscosity, p is pressure, ρ b is blood density, and γ γ is the strain rate and is calculated by the following equation [29]…”

Section: Momentum Equationmentioning

confidence: 99%

Evaluation of Energy Harvesting from Different Sections of the Aortic Artery with Several Energy Harvester Materials

Sadr

Nasri

Pourfarzad

et al. 2022

Adv Materials Technologies

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show abstract

“…Abdominal aortic aneurysm (AAA) is one of the most common cardiovascular diseases (CD) accounting for 1.7-5% people over 65 years of age [1] and reaching up to 10% for 80-year-old male subjects [2]. AAA is characterized by localized deformation and dilatation of the abdominal aorta (usually infrarenal) with 1.5 times the diameter of the healthy aorta [3,4]. AAA can undergo sudden rupture, frequently fatal, making it one of the most common causes of death in the United States [5].…”

Section: Introductionmentioning

confidence: 99%

Intraluminal Thrombus Characteristics in AAA Patients: Non-Invasive Diagnosis Using CFD

et al. 2023

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Abdominal aortic aneurysms (AAA) continue to pose a high mortality risk despite advances in medical imaging and surgery. Intraluminal thrombus (ILT) is detected in most AAAs and may critically impact their development. Therefore, understanding ILT deposition and growth is of practical importance. To assist in managing these patients, the scientific community has been researching the relationship between intraluminal thrombus (ILT) and hemodynamic parameters wall shear stress (WSS) derivatives. This study analyzed three patient-specific AAA models reconstructed from CT scans using computational fluid dynamics (CFD) simulations and a pulsatile non-Newtonian blood flow model. The co-localization and relationship between WSS-based hemodynamic parameters and ILT deposition were examined. The results show that ILT tends to occur in regions of low velocity and time-averaged WSS (TAWSS) and high oscillation shear index (OSI), endothelial cell activation potential (ECAP), and relative residence time (RRT) values. ILT deposition areas were found in regions of low TAWSS and high OSI independently of the nature of flow near the wall characterized by transversal WSS (TransWSS). A new approach is suggested which is based on the estimation of CFD-based WSS indices specifically in the thinnest and thickest ILT areas of AAA patients; this approach is promising and supports the effectiveness of CFD as a decision-making tool for clinicians. Further research with a larger patient cohort and follow-up data are needed to confirm these findings.

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“…In recent years, the heat transfer rates by computational fluid dynamics (CFD) and entropy generation are significantly investigated by researchers and companies due to having accurate with experimental studies [12][13][14][15]. Moreover, owing to its large specific area and higher solid thermal conductivity, there has been growing interest in heat transfer inside the porous media.…”

Section: Introductionmentioning

confidence: 99%

Cooling a Hot Semiannulus with Constant Heat Flux by Using Fe₃O₄‐Water Nanofluid and a Magnetic Field: Natural Convection Mechanism

Yang

Bouzgarrou

Marzouki

et al. 2022

Journal of Nanomaterials

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In this simulation, the nanoparticle distribution and entropy generation were studied using the Buongiorno’s developed two-phase model and magnetic field inside a porous semiannulus cavity. The influence of three terms was considered in the Buongiorno’s developed two-phase model such as Brownian motion, thermophoresis, and magnetophoresis effects. In addition, the entropy generation was assessed due to temperature and velocity gradient. The evidence showed that the effects of the magnetic field in high porosities and volume fraction of nanoparticles were remarkable on the Nusselt number and entropy generation. Also, irreversibility due to heat transfer is much greater than fluid friction.

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Effects of Brownian motions and thermophoresis diffusions on the hematocrit and LDL concentration/diameter of pulsatile non-Newtonian blood in abdominal aortic aneurysm

Cited by 18 publications

References 41 publications

Evaluation of Energy Harvesting from Different Sections of the Aortic Artery with Several Energy Harvester Materials

Evaluation of Energy Harvesting from Different Sections of the Aortic Artery with Several Energy Harvester Materials

Intraluminal Thrombus Characteristics in AAA Patients: Non-Invasive Diagnosis Using CFD

Cooling a Hot Semiannulus with Constant Heat Flux by Using Fe₃O₄‐Water Nanofluid and a Magnetic Field: Natural Convection Mechanism

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Effects of Brownian motions and thermophoresis diffusions on the hematocrit and LDL concentration/diameter of pulsatile non-Newtonian blood in abdominal aortic aneurysm

Cited by 18 publications

References 41 publications

Evaluation of Energy Harvesting from Different Sections of the Aortic Artery with Several Energy Harvester Materials

Evaluation of Energy Harvesting from Different Sections of the Aortic Artery with Several Energy Harvester Materials

Intraluminal Thrombus Characteristics in AAA Patients: Non-Invasive Diagnosis Using CFD

Cooling a Hot Semiannulus with Constant Heat Flux by Using Fe3O4‐Water Nanofluid and a Magnetic Field: Natural Convection Mechanism

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Cooling a Hot Semiannulus with Constant Heat Flux by Using Fe₃O₄‐Water Nanofluid and a Magnetic Field: Natural Convection Mechanism