Hydrothermal analysis on non-Newtonian nanofluid flow of blood through porous vessels

2022 ◽  
pp. 095440892110692
Author(s):  
S. Hosseinzadeh ◽  
Kh. Hosseinzadeh ◽  
A. Hasibi ◽  
D.D. Ganji
Keyword(s):  
Magnetic Field ◽  
Finite Element Method ◽  
Magnetic Field Intensity ◽  
Porous Wall ◽  
Blood Velocity ◽  
Concentration Profiles ◽  
The Finite Element Method ◽  
Governing Equations ◽  
Nanofluid Flow ◽  
The Magnetic Field

In this paper, the flow of non-Newtonian blood fluid with nanoparticles inside a vessel with a porous wall in presence of a magnetic field have been investigated. This study aimed to investigate various parameters such as magnetic field and porosity on velocity, temperature, and concentration profiles. In this research, three different models (Vogel, Reynolds and Constant) for viscosity have been used as an innovation. The governing equations are solved by Akbari-Ganji's Method (AGM) analytical method and the Finite Element Method (FEM) is used to better represent the phenomena in the vessel. The results show that increasing the Gr number, porosity and negative pressure increase the blood velocity and increasing the magnetic field intensity decrease the blood velocity.

scholarly journals Hydrothermal and Entropy Investigation of Ag/MgO/H2O Hybrid Nanofluid Natural Convection in a Novel Shape of Porous Cavity

2021 ◽  
Vol 11 (4) ◽  
pp. 1722
Author(s):  
Nidal Abu-Libdeh ◽  
Fares Redouane ◽  
Abderrahmane Aissa ◽  
Fateh Mebarek-Oudina ◽  
Ahmad Almuhtady ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Heat Transfer ◽  
Natural Convection ◽  
Volume Fraction ◽  
Solid Volume Fraction ◽  
Hybrid Nanofluid ◽  
The Finite Element Method ◽  
Governing Equations ◽  
Nanofluid Flow ◽  
The Magnetic Field

In this study, a new cavity form filled under a constant magnetic field by Ag/MgO/H2O nanofluids and porous media consistent with natural convection and total entropy is examined. The nanofluid flow is considered to be laminar and incompressible, while the advection inertia effect in the porous layer is taken into account by adopting the Darcy–Forchheimer model. The problem is explained in the dimensionless form of the governing equations and solved by the finite element method. The results of the values of Darcy (Da), Hartmann (Ha) and Rayleigh (Ra) numbers, porosity (εp), and the properties of solid volume fraction (ϕ) and flow fields were studied. The findings show that with each improvement in the Ha number, the heat transfer rate becomes more limited, and thus the magnetic field can be used as an outstanding heat transfer controller.

scholarly journals Static force characteristics of electromagnetic actuators for Braille screen

2011 ◽  
Vol 24 (2) ◽  
pp. 157-167 ◽  
Author(s):  
Ivan Yatchev ◽  
Krastio Hinov ◽  
Iosko Balabozov ◽  
Kristina Krasteva
Keyword(s):  
Magnetic Field ◽  
Finite Element Method ◽  
Finite Element ◽  
Permanent Magnet ◽  
Static Force ◽  
The Finite Element Method ◽  
Electromagnetic Actuators ◽  
Minimum Force ◽  
The Magnetic Field ◽  
Force Characteristics

Several constructions of electromagnetic actuators with moving permanent magnet for Braille screen are studied. All they are formed from a basic one that consists of two coils, core and moving permanent magnet. The finite element method is used for modeling of the magnetic field and for obtaining the electromagnetic force acting on the mover. The static force-stroke characteristics are obtained for four different constructions of the actuator. The constructions with ferromagnetic disc between the coils ensure greater force than the ones without disc and can reach the required minimum force.

Magnetic Field Analysis for Magnetron Sputtering Apparatus for Accurate Composition Control

2009 ◽  
Vol 154 ◽  
pp. 175-179 ◽  
Author(s):  
Yutaka Sakurai ◽  
Ryo Nakajima ◽  
Hiroko Nakamura
Keyword(s):  
Magnetic Field ◽  
Finite Element Method ◽  
Magnetron Sputtering ◽  
Field Analysis ◽  
The Finite Element Method ◽  
Film Composition ◽  
Composite Target ◽  
Composition Control ◽  
Magnetic Field Analysis ◽  
The Magnetic Field

Authors use magnetron sputtering technique for controlling the film composition by modifying the magnetic field with an external solenoid in addition to the magnetic field with a permanent magnet on back of composite target. It is necessary to understand the contribution of the solenoid quantitatively for the effective application of this technique. The magnetic field changes by the solenoid current on the target were calculated by the finite element method (FEM), and compared with the film composition. As the solenoid current increases, magnetic tunnel region on the target (correspond with the well sputtered region by the confined plasma) moves to the centre of the target. The behaviour corresponds with the actually formed film composition. The calculated results also give an information to design the composite target and the correction value for using the already eroded target.

scholarly journals New Constitutive Matrix in the 3D Cell Method to Obtain a Lorentz Electric Field in a Magnetic Brake

Sensors ◽  
2018 ◽  
Vol 18 (10) ◽  
pp. 3185 ◽  
Author(s):  
José Monzón-Verona ◽  
Pablo González-Domínguez ◽  
Santiago García-Alonso
Keyword(s):  
Magnetic Field ◽  
Finite Element Method ◽  
Finite Element ◽  
Computer Applications ◽  
The Finite Element Method ◽  
Cell Method ◽  
Hall Sensors ◽  
Constitutive Matrix ◽  
The Magnetic Field ◽  
Made In

In this work, we have obtained a new constitutive matrix to calculate the induced Lorentz electric current of in a conductive disk in movement within a magnetic field using the cell method in 3D. This disk and a permanent magnet act as a magnetic brake. The results obtained are compared with those obtained with the finite element method (FEM) using the computer applications Getdp and femm. The error observed is less than 0.1173%. Likewise, a second verification has been made in the laboratory using Hall sensors to measure the magnetic field in the proximity of the magnetic brake.

Modeling of Eddy Current Loss for Magnetic Thrust Bearings

2011 ◽  
Author(s):  
Yongsheng Tian ◽  
Yanhua Sun ◽  
Lie Yu
Keyword(s):  
Magnetic Field ◽  
Eddy Current ◽  
Magnetic Field Intensity ◽  
Fem Simulation ◽  
Eddy Current Loss ◽  
The Finite Element Method ◽  
Current Loss ◽  
Surface Magnetic Field ◽  
Thrust Bearings ◽  
The Magnetic Field

In this paper, an analytical model for calculating eddy current loss in magnetic thrust bearings (MTBs) is presented. The surface magnetic field intensity, considering the skin effect of eddy current, is varying with the frequency and can be calculated by effective reluctance method. The magnetic field distribution and eddy current loss can be obtained from it. Finally, the validity of the model is verified by the finite element method (FEM) simulation and experimental results.

Modeling and Design Optimization of Contactless Sliding Transformer System for Ropeless Elevators

2013 ◽  
Vol 416-417 ◽  
pp. 264-269
Author(s):  
Pei Long Wang ◽  
Xiao Zhuo Xu ◽  
Bao Yu Du ◽  
Hai Chao Feng ◽  
Xu Dong Wang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Finite Element Method ◽  
Finite Element ◽  
Permanent Magnet ◽  
Power Transmission ◽  
Electrical Power ◽  
Coupling Coefficients ◽  
The Finite Element Method ◽  
The Magnetic Field ◽  
Load Conditions

In this paper, two novel topological structures of sliding transformer with ferromagnetic core applied in the Contactless Electrical Power Transmission (CEPT) system used for the ropeless elevator driven by moving-coil type Permanent Magnet Synchronous Linear Motor (PMLSM) have been proposed, and the magnetic field distribution is calculated and analyzed by the finite element method (FEM). According to the analysis results of the traditional E-E topology sliding transformer, much higher coupling coefficients of sliding transformers with proposed topologies have been obtained. Then, based on the magnetic distribution and the circuit model of system, the compensation capacitances have been calculated considering supply frequency and load conditions. Finally, the load characteristic of the system with compensation is also obtained by FEM.

Восстановление топографии поверхностных дефектов ферромагнетиков при нормальном намагничивающем поле

2021 ◽  
pp. 35-41
Author(s):  
Ю.Л. Гобов ◽  
С.Э. Попов
Keyword(s):  
Magnetic Field ◽  
Finite Element Method ◽  
Equipotential Surface ◽  
Ferromagnetic Material ◽  
Small Distance ◽  
The Finite Element Method ◽  
Reconstruction Accuracy ◽  
Soft Magnetic ◽  
The Magnetic Field ◽  
Magnetizing Field

A technique for reconstructing the topography of defects in ferromagnetic materials in a normal magnetizing field is considered. It is shown that with such a magnetization, the surface of a soft magnetic ferromagnetic material is an equipotential surface. An approximation is proposed that makes it possible to obtain its topography from the results of measuring the three components of the magnetic field at a small distance from the defect. The reconstruction accuracy was estimated from the results of calculating the field from the defect by the finite element method and reconstructing the topography of the defect using the proposed approximation.

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