Meshing Research Papers - Academia.edu (original) (raw)

The use of turbochargers has increased in response to strengthened automotive exhaust emission and fuel consumption regulations for global environmental protection. Most centrifugal compressors are required to operate over a broad range of flow rates and to provide a high pressure ratio with high efficiency. The internal flow of a centrifugal compressor is very problematic with 3-dimensional and unsteady flow phenomena, and the analysis of flow phenomena and expansion of the operational range are difficult problems. Review is done for gathering the efficient method for designing and analyzing the centrifugal compressor. In order to meet these demands the application of variable geometry techniques is often considered and applied.

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- Simulation, ANSYS FLUENT, Computational Fluid Dynamics (CFD), Meshing

The wing of aircraft is designed according to the mission or operational purposes. In the design, maintenance and operations of training aircrafts, cost, reliability and safety are some of the most important parameters to consider. Wing performances are not just determined by their aerodynamic characteristics but also their structural characteristics which is the ability to sustain both internal and external loads. In addition to the internal weights of the spars, ribs, stringers, landing gear and tanks, the fuel load and aerodynamic loads are external forces that act on the structure and exert pressure on it. This paper will concentrate on the structural design of the wing of a two-seater trainer aircraft. The report addresses both modeling and simulation in order to evaluate the wing structural performances. The modeling is performed using SolidWorks and the simulation using ANSYS. Also, a MATLAB m-file coding is used to generate the wing external dimensions. The result of the simulation is then analyzed and interpreted. At the end, a construction of V-n diagram for the designed wing is achieved.

The moving-mesh provides a capability of tackling flow simulations where the domain shape changes during the simulation. In such cases, the computational mesh needs to adapt to the time-varying shape of the domain and preserve its validity and quality. The mesh motion solver support which calculates the internal point motion based on the prescribed motion of the boundary. The performance of the method is preserved through the choice of decomposition of cells, the bounded discretization and the use of iterative solvers

- by Ideen Sadrehaghighi
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- Unstructured Meshing, Meshing

A dynamic model of vibration screen for cement industry is established in order investigate the working performance of the system. In order to acquire result 3D model of vibration screen is created using solid works 2012. In modelling for simplicity whole mass of vibration screen is considered as equivalent mass which is supported by four spring. Simulated model is used in Ansys Workbench 14 for analysis of system. In analysis modal analysis used to find natural frequency of system. Modal analysis is the process of determining inherent dynamic characteristics of system in form of natural frequency, damping factors and mode shape and using them to formulate mathematical model for its dynamic behaviour. The formulated mathematical mode is referred to as modal model of the system and the information for the characteristics is known as modal data. The dynamics of a structure are physically decomposed by frequency and position. This is clearly evidenced by the analytical solution of partial differential equations of continuous systems such as beams and strings. Modal analysis is based upon the fact that the vibration response of a linear time-invariant dynamic system can be expressed as the linear combination of a set of simple harmonic motions called the natural modes of vibration.

- by Sergio Coronado
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- Modeling and Simulation, Meshing
- by Ideen Sadrehaghighi
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- Meshing

The main aim of this paper isto design, analyze and develop a fully comfortableMCM (Multipurpose Commode Motorized) wheelchair for handicapped users. The purpose of the study was to design a cost effective, adjustable, and lightweight wheelchair with lot of good features. A quality function design of the wheelchair is prepared on CATIA V5 software and also there simulations and weight evaluated with their performance. Design model was prepared using anthropometric parameters of tallest user. To assess the wheelchair designs, static strength, and stability, here the researchers carried out the static and crash analysis using 1D,2D and 3D meshing with the help of ANSYS 14.0 and HYPERMESH 12.0, thereby applying loads and various boundary constraints to evaluate the deformation and the von-mises stress on different members to study the high stress concentration points.Wheelchair designed for paralysis were developed that were cost effective, adjustable and had light weight compared to commercially available wheelchairs.

We present a modular tool chain for high performance CFD simulations of pulsatile blood flow in intracranial aneurysms. We describe a path from in-situ imaging (ie. CT and MRI) to flow simulations and show different modules for obtaining anatomically accurate and allover smooth meshes suitable for computed fluid dynamics (CFD) as well as methods for computing the blood flow in a robust and high performing way.

Generating finite element mesh for the purpose of determining structural response of shells is not a trivial task. This paper presents a solution to this problem using a combination of basic parametric patch models, mesh to solid intersections and mesh to mesh intersections. First a shell classification and generalization is carried out and then parametric shell patches are defined. At the second level, parametric shell models are defined using parametric patches. The finite element mesh of these parametric models is generated based on specified mesh size and type. The basic parametric models are then combined to create more complex shell forms and structures. The combined mesh of these models is determined by intersecting each parametric model by other overlapping models. This intersection includes the determination of mesh to be removed, the mesh to be retained and mesh to be modified to enforce the compatibility and continuously across and along the intersecting boundaries. The results of each intersection are then carried on to the overlapping parametric models. The mesh intersection is based on volumetric entitles such as cylinder, sphere, prism as well as planes and surfaces. The final mesh can be either in terms of surface elements such as shells or membranes or as line elements such as frame truss or cable elements. Several examples of mesh generation are given applicable to water tank, reservoirs, shell roofs, fabric structures etc. The basic parametric shells include cylindrical, spherical, hypars, shells or revolution, folded plates, planner canopies etc.

- by Naveed Anwar
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- Finite element method, Finite Elements, Meshing
- by Hamidreza Arzbin
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- Solar Cell, Simulation, Meshing, Pn Junction

Automatic finite element mesh generation of CAD generated data has been a goal of finite element meshing codes for years. However, the lack of accuracy and the amount of detail in this data have made this a daunting task. In essence, the CAD data needs to be defeatured to overcome accuracy deficiencies and to remove excessive detail. In this paper, an object-oriented approach to automatic geometry defeaturing is presented. The geometric and finite element data abstractions are given, along with the basic algorithms used. These algorithms deal with near tangencies, coincident edge precision discrepancies, poor intersection curve accuracy, and small geometrical features. Along with this discussion, examples of these types of defeaturing are given.

- by Scott Canann
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- Computer Science, Computer Aided Engineering, Computer Aided Design, Finite Element

An ATV roll cage is a specially designed protective frame around the driver that protects the driver in each & every condition. During the designing of roll cage take few objectives like diver safety, easy of manufacturing, light weight, ergonomics. This paper outline dynamic analysis of roll cage of ATV by doing per & post processing in ANSYS 18.2 & CAD modelling done in solid works 2018 to obtain optimum FOS (factor of safety) in worst condition under a set of particular rules given by Society of Automotive Engineers (SAE) Which ensure that the roll cage of ATV will be safe in all conditions.

Meshing can be defined as the process of breaking up a physical domain into smaller elements in order to facilitate the numerical solution of a partial differential equation. This process have been automatized through several algorithms under various computational systems to attempt the increasing “push” of meshing technology. In fact, human analysts expect to mesh complex domains constituted of thousands or even millions of elements with low level of interactions. In spite of high transparency, one difficulty arises: how to develop the necessary sensitivity to analyse the relationship between the mesh quality, in global sense, and the element quality, in local sense, with minimal interactions? The aim of this paper is to provide a simple and didactic two dimensional meshing web application (2D-Mesher), that permits the evaluation of a given mesh, concerning its global quality, by operating definition and manipulation over a set of element properties. Thus, the expectation is to con...

- by Sergio Scheer
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- Computer Science, Meshing

Meshing can be defined as the process of breaking up a physical domain into smaller elements in order to facilitate the numerical solution of a partial differential equation. This process have been automatized through several algorithms under various computational systems to attempt the increasing " push " of meshing technology. In fact, human analysts expect to mesh complex domains constituted of thousands or even millions of elements with low level of interactions. In spite of high transparency, one difficulty arises: how to develop the necessary sensitivity to analyse the relationship between the mesh quality, in global sense, and the element quality, in local sense, with minimal interactions? The aim of this paper is to provide a simple and didactic two dimensional meshing web application (2D-Mesher), that permits the evaluation of a given mesh, concerning its global quality, by operating definition and manipulation over a set of element properties. Thus, the expectation is to contribute to the understanding of the meshing process, and its relevance in numerical solution. The didactic web application was designed in an object oriented fashion and implemented using Java Language, trying to increase the access and to facilitate the ability for meshing construction and analysis. A practical optical cable design analysis is used to demonstrate the process and the application capabilities.

- by Alexandre Manoel dos Santos and +1
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- Meshing

Salah satu bagian dari pesawat UAV adalah propeller, dimana fungsi propeller ini adalah sebagai gaya dorong (trush) bagi sebuah pesawat. namun dalam sebuah propeller terdapat gaya dorong yang menyebabkan terjadi beberapa macam tegangan yang terjadi propeller Untuk mempermudah mendapatkan tegangan, regangan dan deformasi yang terjadi pada bilah propeller maka dilakukan simulasi aliran maupun static structural yang merupakan tujuan dari penelitian ini. Kegunaan dilakukannya simulasi ini adalah untuk mendapatkan nilai tegangan, regangan dan deformasi yang terjadi pada setiap elemen propeller. Dalam hal ini setiap bagian pada propeller akan mendapatkan tegangan yang berbeda pada setiap titik. Dalam melakukan simulasi pada propeller peneliti menggunakan software ansys 15.0 yaitu fluent dan static structural dengan variasi kecepatan fluida sebesar 10 – 50 m/s. Propeller dibagi dalam 198827 meshing yang dilakukan di fluent, setelah hasil aliran didapat maka hasil tersebut menjadi input di ...

- by Alfian Hamsi
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- Propeller, Meshing, Fluent

This paper presents and explains the procedure for creating 3D models of human bones for subsequent numerical analysis. In particular, the models of tibia and femur are constructed from a number of magnetic resonance (MR) images using MIMICS software. The models are meshed and prepared for the numerical analysis of the contact problem between them. In addition, the procedure of producing real models using 3D printing (3DP) is also presented. The study shows a great potential of this approach not only for the analysis of the contact phenomena, but also in other biomechanics areas, such as for planning complex surgical procedures, design and manufacture of implants, and so on.

- by Aleksandar Karač
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- Numerical Analysis, Segmentation, Magnetic Resonance Imaging (MRI), Meshing

Generating finite element mesh for the purpose of determining structural response of shells is not a trivial task. This paper presents a solution to this problem using a combination of basic parametric patch models, mesh to solid intersections and mesh to mesh intersections. First a shell classification and generalization is carried out and then parametric shell patches are defined. At the second level, parametric shell models are defined using these parametric patches. The finite element mesh of these parametric models is generated based on specified mesh size and type. The basic parametric models are then combined to create more complex shell forms and structures. The combined mesh of these models is determined by intersecting each parametric model by other overlapping or adjacent models. This intersection includes the determination of mesh to be removed, the mesh to be retained and mesh to be modified to enforce the compatibility and continuity across and along the intersecting boundaries. The mesh intersection is based on volumetric entitles such as cylinder, sphere, prism as well as planes and surfaces. The final mesh can be either in terms of surface elements such as shells or membranes or as line elements such as frame truss or cable elements. Several examples of mesh generation are given applicable to water tank, reservoirs, shell roofs, fabric structures etc. The basic parametric shells include cylindrical, spherical, hypars, shells or revolution, folded plates, planner canopies etc.

- by Naveed Anwar
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- Finite Elements, Meshing, Shell Model
- by Sudhakar Marur
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- Mesh generation, Meshing, 3D Surface and Shape Perception