Relevant bibliographies by topics / Unstructured grid

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Unstructured grid'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Unstructured grid"

1

Mavriplis, D. J. "UNSTRUCTURED GRID TECHNIQUES." Annual Review of Fluid Mechanics 29, no. 1 (January 1997): 473–514. http://dx.doi.org/10.1146/annurev.fluid.29.1.473.

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Evazi, M., and H. Mahani. "Unstructured-Coarse-Grid Generation Using Background-Grid Approach." SPE Journal 15, no. 02 (March 3, 2010): 326–40. http://dx.doi.org/10.2118/120170-pa.

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Summary Reservoir flow simulation involves subdivision of the physical domain into a number of gridblocks. This is best accomplished with optimized gridpoint density and a minimized number of gridblocks, especially for coarse-grid generation from a fine-grid geological model. In any coarse-grid generation, proper distribution of gridpoints, which form the basis of numerical gridblocks, is a challenging task. We show that this can be achieved effectively by a novel grid-generation approach based on a background grid that stores gridpoint spacing parameters. Spacing parameter (L) can be described by Poisson's equation (∇2L = G), where the local density of gridpoints is controlled by a variable source term (G); see Eq. 1. This source term can be based on different gridpoint density indicators, such as permeability variations, fluid velocity, or their combination (e.g., vorticity) where they can be extracted from the reference fine grid. Once a background grid is generated, advancing-front triangulation (AFT) and then Delaunay tessellation are invoked to form the final (coarse) gridblocks. The algorithm produces grids varying smoothly from high- to low-density gridpoints, thus minimizing use of grid-smoothing and -optimization techniques. This algorithm is quite flexible, allowing choice of the gridding indicator, hence providing the possibility of comparing the grids generated with different indicators and selecting the best. In this paper, the capabilities of approach in generation of unstructured coarse grids from fine geological models are illustrated using 2D highly heterogeneous test cases. Flexibility of algorithm to gridding indicator is demonstrated using vorticity, permeability variation, and velocity. Quality of the coarse grids is evaluated by comparing their two-phase-flow simulation results to those of fine grid and uniform coarse grid. Results demonstrate the robustness and attractiveness of the approach, as well as relative quality/performance of grids generated by using different indicators.
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Suzuki, Masahiro. "Surface grid generation based on unstructured grids." AIAA Journal 29, no. 12 (December 1991): 2262–64. http://dx.doi.org/10.2514/3.10869.

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Petrov, I. B., A. V. Favorskaya, M. V. Muratov, V. A. Biryukov, and A. V. Sannikov. "Grid-characteristic method on unstructured tetrahedral grids." Doklady Mathematics 90, no. 3 (November 2014): 781–83. http://dx.doi.org/10.1134/s1064562414070254.

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Löhner, Rainald. "Automatic unstructured grid generators." Finite Elements in Analysis and Design 25, no. 1-2 (March 1997): 111–34. http://dx.doi.org/10.1016/s0168-874x(96)00038-8.

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Löhner, Rainald, Jose Camberos, and Marshal Merriam. "Parallel unstructured grid generation." Computer Methods in Applied Mechanics and Engineering 95, no. 3 (March 1992): 343–57. http://dx.doi.org/10.1016/0045-7825(92)90192-m.

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Lauritzen, P. H., J. T. Bacmeister, P. F. Callaghan, and M. A. Taylor. "NCAR_Topo (v1.0): NCAR global model topography generation software for unstructured grids." Geoscientific Model Development 8, no. 12 (December 14, 2015): 3975–86. http://dx.doi.org/10.5194/gmd-8-3975-2015.

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Abstract. It is the purpose of this paper to document the NCAR global model topography generation software for unstructured grids (NCAR_Topo (v1.0)). Given a model grid, the software computes the fraction of the grid box covered by land, the grid-box mean elevation (deviation from a geoid that defines nominal sea level surface), and associated sub-grid-scale variances commonly used for gravity wave and turbulent mountain stress parameterizations. The software supports regular latitude–longitude grids as well as unstructured grids, e.g., icosahedral, Voronoi, cubed-sphere and variable-resolution grids.
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Guo, Guang Dong, Song Sheng Deng, and Wei Xing Hua. "Comparison of Different Grid Structures for the Hydrocyclone Flow Field Simulation." Applied Mechanics and Materials 353-356 (August 2013): 3399–402. http://dx.doi.org/10.4028/www.scientific.net/amm.353-356.3399.

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In the CFD(computational fluid dynamics) study of hydrocyclones, the grid is a important factor to predicting the flow field. An attempt has been made in this study, in the same turbulence model and boundary conditions, three different structures of grid, the structured grid, the unstructured grid and the hybrid grid, are compared for the predictions of the axial, radial and tangential velocities. It has been observed that the memory space structured grid is large, and there are much number grid of the unstructured grid. The structured grid led to an improved turbulence field prediction and thereby to predict the velocity fields of single phase flow field more accurately. The unstructured grids is used to simulate the process of oil-water separation.
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Fung, L. S. K. S. K., X. Y. Y. Ding, and A. H. H. Dogru. "Unconstrained Voronoi Grids for Densely Spaced Complex Wells in Full-Field Reservoir Simulation." SPE Journal 19, no. 05 (January 30, 2014): 803–15. http://dx.doi.org/10.2118/163648-pa.

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Summary Accurate representation of near-well flow is an important subject matter in reservoir simulation. In today's field-scale reservoir simulation, cell-centered structured grids remain the predominant practice. Typically, well-inflow performance of the perforated cells is connected to the finite-volume solution by means of well indices that may not be well-defined when the wellbore intersects the finite-volume cells in a complex trajectory. Fine gridding is also required to resolve the flow dynamics in the near-well regions. Strong grid-orientation sensitivities can also contribute to the numerical errors and may require significant local grid refinement to alleviate. There are ongoing resesarch-and-development (R&D) efforts on applying unstructured grids to better represent the near-well flow in reservoir simulation, but their applications are mainly in single-well study or sector modeling with a few wells. Some of the reasons cited for this include (1) the lack of an effective, easy-to-use full-field complex well-gridding tool; (2) the lack of supporting unstructured workflow for full-cycle reservoir simulation; (3) the cost of unstructured-grid simulation; and (4) the availability of post-analysis and visualization tools for unstructured-grid simulation. The paper describes a novel method to automatically generate unstructured grids that conform to complex well paths in field-scale simulation. The method uses a multilevel approach to place cells optimally within the solution domain on the basis of the “regions of interests.” The wellbore geometry is honored by means of the construction of a near-well grid that is complemented with multilevel quad-tree (Fig. 1) refinements to achieve the desired resolution in grid transition zones. The method includes an algorithm to remove small cells and pinching cells on the basis of local grid quality measures and cell prioritization to honor well paths. The gridding process forms a component of a production-level reservoir-simulation workflow. The use of unstructured grid results in computational savings by placing cells where the resolution is needed. An in-house massively parallel simulator is used to run the unstructured-grid models. Simulation examples for full-field applications with hundreds of complex wells by use of both structured grids and unstructured grids will be used to compare results, accuracy, and performance of the gridding method for reservoir simulation.
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TIAN, SHULING, YIZHAO WU, and JIAN XIA. "NUMERICAL SIMULATION OF UNSTEADY FLOW FIELD AROUND HELICOPTER IN FORWARD FLIGHT USING A PARALLEL DYNAMIC OVERSET UNSTRUCTURED GRIDS METHOD." Modern Physics Letters B 23, no. 03 (January 30, 2009): 325–28. http://dx.doi.org/10.1142/s021798490901831x.

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A parallel Navier-Stokes solver based on dynamic overset unstructured grids method is presented to simulate the unsteady turbulent flow field around helicopter in forward flight. The grid method has the advantages of unstructured grid and Chimera grid and is suitable to deal with multiple bodies in relatively moving. Unsteady Navier-Stokes equations are solved on overset unstructured grids by an explicit dual time-stepping, finite volume method. Preconditioning method applied to inner iteration of the dual-time stepping is used to speed up the convergence of numerical simulation. The Spalart-Allmaras one-equation turbulence model is used to evaluate the turbulent viscosity. Parallel computation is based on the dynamic domain decomposition method in overset unstructured grids system at each physical time step. A generic helicopter Robin with a four-blade rotor in forward flight is considered to validate the method presented in this paper. Numerical simulation results show that the parallel dynamic overset unstructured grids method is very efficient for the simulation of helicopter flow field and the results are reliable.
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Dissertations / Theses on the topic "Unstructured grid"

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Said, Rajab. "Unstructured parallel grid generation." Thesis, Swansea University, 2003. https://cronfa.swan.ac.uk/Record/cronfa42637.

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The ultimate goal of this study is to develop a 'tool' by which large-scale unstructured grids for realistic engineering problems can be generated efficiently on any parallel computer platform. The adopted strategy is based upon a geometrical partitioning concept, where the computational domain is sub-divided into a number of sub-domains which are then gridded independently in parallel. This study focuses on three-dimensional applications only, and it implements a Delaunay triangulation based generator to generate the sub-domain grids. Two different approaches have been investigated, where the variations between them are limited to (i) the domain decomposition and (ii) the inter-domain boundary gridding algorithms only. In order to carry out the domain decomposition task, the first approach requires an initial tetrahedral grid to be constructed, whilst the second approach operates directly on the boundary triangular grid. Hence, this thesis will refer to the first approach as 'indirect decomposition method' and to the second as 'direct decomposition method'. Work presented in this thesis also concerns the development of a framework in which all different sub-algorithms are integrated in combination with a specially designed parallel processing technique, termed as Dynamic Parallel Processing (DPP). The framework adopts the Message Passing Library (MPL) programming model and implements a Single Program Multiple Data (SPMD) structure with a Manager/Workers mechanism. The DPP provides great flexibility and efficiency in exploiting the available computing resources. The framework has proved to be a very effective tool for generating large-scale grids. Grids of realistic engineering problems and to the order of 115 million elements, generated using one processor on an SGI Challenge machine with 512 MBytes of shared memory, will be presented.
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Burgess, David A. "Parallel computing for unstructured mesh algorithms." Thesis, University of Oxford, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318758.

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Bailey, R. H. "Unstructured grid methods and moving boundary problems." Thesis, Swansea University, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636006.

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The work presented in this thesis is concerned with the modelling of moving boundary problems, with particular reference to the solution of the problem of the release of a store from beneath an aircraft wing. Chapter 2 presents a two-dimensional unstructured mesh generation procedure for generating grids of three-noded triangular elements about any number of arbitrarily shaped geometries and within an arbitrarily shaped domain. The method combines a Quadtree point generation procedure with a Delaunay triangulation algorithm. The method is used to generate the grids for the moving boundary algorithm. Chapter 3, a moving boundary flow solution algorithm and the corresponding data control structure are presented. The flow solver uses the explicit timestepping procedure of Lohner et al. A multiple grid or grid embedding procedure is used to model the motion of a body relative to another or other stationary bodies. A minor grid encloses the moving body and is allowed to move under a prescribed motion over the grid enclosing the stationary bodies spanning the domain. A number of steady state problems are analysed and a simple store release case is examined. Chapter 4 presents an implicit finite element scheme for the solution of the flow problems using an unstructured computational grid. The algorithm is based upon the centred finite difference scheme of Lerat et al. The governing equations are solved using a Generalized Minimal Residual method, which is related to the Conjugate Gradient method. A number of steady state flow solutions are presented. Finally, the implicit algorithm is incorporated into the moving boundary data structure of Chapter 3 and results for the new scheme are presented.
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Haselbacher, Andreas C. "A grid-transparent numerical method for compressible viscous flows on mixed unstructured grids." Thesis, Loughborough University, 1999. https://dspace.lboro.ac.uk/2134/7257.

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The goal of the present work is the development of a numerical method for compressible viscous flows on mixed unstructured grids. The discretisation is based on a vertex-centred finite-volume method. The concept of grid transparency is developed as a framework for the discretisation on mixed unstructured grids. A grid-transparent method does not require information on the cell types. For this reason, the numerical method developed in the present work can be applied to triangular, quadrilateral, and mixed grids without modification. The inviscid fluxes are discretised using the approximate Riemann solver of Roe. A limited linear-reconstruction method leads to monotonic capturing of shock waves and second-order accuracy in smooth regions of the flow. The discretisation of the viscous fluxes on triangular and quadrilateral grids is first studied by reference to Laplace's equation. A variety of schemes are evaluated against several criteria. The chosen discretisation is then extended to the viscous fluxes in the Navier-Stokes equations. A careful study of the various terms allows a form to be developed which may be regarded as a thin-shear-layer approximation. In contrast to previous implementations, however, the present approximation does not require knowledge of normal and tangential coordinate directions near solid surfaces. The effects of turbulence are modelled through the eddy-viscosity hypothesis and the one-equation model of Spalart and Allmaras. The discrete equations are marched to the steady-state solution by an explicit Runge-Kutta method with local time-stepping. The turbulence-model equation is solved by a point-implicit method. To accelerate the convergence rate, an agglomeration multigrid method is employed. In contrast to previous implementations, the governing equations are entirely rediscretised on the coarse grid levels. The solution method is applied to various inviscid, laminar, and turbulent flows. The performance of the multigrid method is compared for triangular and quadrilateral grids. Care is taken to assess numerical errors through grid-refinement studies or comparisons with analytical solutions or experimental data. The main contributions of the present work are the careful development of a solution method for compressible viscous flows on mixed unstructured grids and the comparison of the impact of triangular, quadrilateral, and mixed grids on convergence rates and solution quality.
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Tasri, Adek. "Accuracy of nominally 2nd order unstructured grid, CFD codes." Thesis, University of Newcastle Upon Tyne, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.420042.

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Sekhar, Susheel Kumar. "Viscous hypersonic flow physics predictions using unstructured Cartesian grid techniques." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/45857.

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Aerothermodynamics is an integral component in the design and implementation of hypersonic transport systems. Accurate estimates of the aerodynamic forces and heat transfer rates are critical in trajectory analysis and for payload weight considerations. The present work seeks to investigate the ability of an unstructured Cartesian grid framework in modeling hypersonic viscous flows. The effectiveness of modeling viscous phenomena in hypersonic flows using the immersed boundary ghost cell methodology of this solver is analyzed. The capacity of this framework to predict the surface physics in a hypersonic non-reacting environment is investigated. High velocity argon gas flows past a 2-D cylinder are simulated for a set of freestream conditions (Reynolds numbers), and impact of the grid cell sizes on the quality of the solution is evaluated. Additionally, the formulation is verified over a series of hypersonic Mach numbers for the flow past a hemisphere, and compared to experimental results and empirical estimates. Next, a test case that involves flow separation and the interaction between a hypersonic shock wave and a boundary layer, and a separation bubble is investigated using various adaptive mesh refinement strategies. The immersed boundary ghost cell approach is tested with two temperature clipping strategies, and their impact on the overall solution accuracy and smoothness of the surface property predictions are compared. Finally, species diffusion terms in the conservation equations, and collision cross-section based transport coefficients are installed, and hypersonic flows in thermochemical nonequilibrium environments are studied, and comparisons of the off-surface flow properties and the surface physics predictions are evaluated. First, a 2-D cylinder in a hypersonic reacting air flow is tested with an adiabatic wall boundary condition. Next, the same geometry is tested to evaluate the viscous chemistry prediction capability of the solver with an isothermal wall boundary condition, and to identify the strengths and weaknesses of the immersed boundary ghost cell methodology in computing convective heating rates in such an environment.
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Lyra, P. R. M. "Unstructured grid adaptive algorithms for fluid dynamics and heat conduction." Thesis, Swansea University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.637967.

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This work is concerned with the development of reliable and versatile computational tools for the numerical simulation of two-dimensional heat conduction and incompressible and compressible laminar fluid flow problems. Issues related to adaptive techniques, discretisation methodologies (upwind or centred type) and the design of high-resolution shock-capturing schemes are investigated in this thesis. Three distinct research works have been pursued here. In the first work, attention is focused on the construction of an adaptive finite element procedure with mesh refinement, by mesh enrichment, in time and space, and with automatic time stepping for the heat conduction problem in a stationary medium. The Galerkin finite element method and the Euler-backward time marching scheme are used as the basis to obtain the steady-state and transient approximate solutions. Particular emphasis concentrates on the design of the adaptive strategy and the combined influence of time and spatial adaptation. The second task is concerned with the derivation of adaptive remeshing strategies for both steady and unsteady solution of the incompressible Navier-Stokes equations in primitive variables. A Petrov-Galerkin formulation, which automatically introduces streamline upwinding and allows equal order interpolation for all variables, combined with either an explicit or implicit time integration represents the general discretisation methodologies adopted. The adaptive redefinition of the mesh, the error estimate and specific features, such as the presence of singularities on the solution and accumulation of interpolation errors inherent to a transient remeshing, are carefully analysed with some remedies proposed to deal with such difficulties. In the final part of the thesis, the most relevant mathematical-physical properties of the first order hyperbolic model equations are discussed. The utilisation of upstream or centred discretisation and several ways to produce high-resolution schemes to deal with this class of problems are described and compared for one-dimensional test cases. With regard to upwind discretisation techniques, the most popular flux difference splitting, flux vector splitting and some recently proposed hybrid splitting methodologies are considered.
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Zagaris, George. "Parallel Unstructured Grid Generation for Complex Real-World Aerodynamic Simulations." W&M ScholarWorks, 2008. https://scholarworks.wm.edu/etd/1539626877.

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Zhao, Qiuying. "Towards Improvement of Numerical Accuracy for Unstructured Grid Flow Solver." University of Toledo / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1353107603.

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Liu, Zhuo. "Development of Large-Scale Unstructured Grid Storm Surge and Sub-Grid Inundation Models for Coastal Applications." W&M ScholarWorks, 2018. https://scholarworks.wm.edu/etd/1550153651.

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Storm surge and inundation induced by hurricanes and nor'easters pose a profound threat to coastal communities and ecosystems. These storm events with powerful winds, heavy precipitation, and strong wind waves can lead to major flooding for cities along U.S. Coasts. Recent examples of Hurricane Irene (2011) in North Carolina and Virginia and Hurricane Sandy (2012) in New York City not only demonstrated the immense destructive power by the storms, but also revealed the obvious, crucial need for improved forecasting of storm tide and inundation. in part I, a large-scale unstructured-grid 3-D barotropic storm tide model SCHISM (Semi-implicit Cross-scale Hydroscience Integrated System Model) is developed with open ocean boundary aligning along the 60-degree West longitude to catch most Atlantic hurricanes that may make landfall along U.S. East and Gulf Coasts. The model, driven by high-resolution NAM (North America Mesoscale) and ECMWF (European Centre for Medium-Range Weather Forecasts) atmospheric fields, was coupled with Wind Wave Model (WWMIII) to account for wave effects, and used to simulate storm surge in 3-D barotropic mode rather than the traditional 2-D vertical average mode. For Hurricane Sandy, the fully coupled wave-current interaction 3-D model using ECMWF atmospheric forcing performs the best. The storm tide results match well with observation at all nine NOAA tidal gauges along the East Coast. The maximum total water level in New York City, is accurately simulated with absolute error of amplitude less than 8 cm, and timing difference within 10 minutes. The scenarios of "2-D" versus "3-D" and "with" versus "without" wind wave model were compared and discussed in details. Overall, the wave contribution amounts to 5-10% of surge elevation during the event. Also, the large-scale model with similar setup is applied to hindcasting storm tide during Hurricane Irene and the results are excellent when compared with observed water level along Southeast Coast and inside Chesapeake Bay. in part II, a high-resolution sub-grid inundation model ELCIRC-sub (Eulerian-Lagrangian CIRCulation) was developed from the original finite-volume-based ELCIRC model. It utilized the sub-grid method for imbedding high-resolution topography/bathymetry data into the traditional model grid and delivering the inundation simulation on the street level scale. The ELCIRC-sub contains an efficient non-linear solver to increase the accuracy and was executed in the MPI (Message Passing Interface) parallel computing platform to vastly enlarge the water shed coverage, and to expand the numbers of sub-grids allowed. The ELCIRC-sub is first validated with a wetting/drying analytic solution and then applied in New York City for Hurricane Sandy (2012). Temporal comparisons with NOAA and USGS water level gauges showed excellent performance with an average error on the order of 10 cm. It accurately captured the highest surge (during Hurricane Sandy) at Kings Point on both maximum surge height and the explosive surge profile. Spatial comparisons of the modeled peak water level at 80 locations around New York City showed an average error less than 13 cm. The modeled maximum modeled inundation extent also matched well with 80% of the FEMA flooding map. in terms of robustness and efficiency for practical application, ELCIRC-sub surpasses the prototype model UnTRIM2.
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Books on the topic "Unstructured grid"

1

Venkatakrishnan, V. A perspective on unstructured grid flow solvers. Hampton, Va: Institute for Computer Applications in Science and Engineering, 1995.

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Anderson, W. Kyle. Grid generation and flow solution method for Euler equations on unstructured grids. [Washington, DC]: National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Program, 1992.

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Mineck, Raymond E. Application of an unstructured grid Navier-Stokes solver to a generic helicopter body: Comparison of unstructured grid results with structured grid results and experimental results. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1999.

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Morano, Eric. Coarsening strategies for unstructured multigrid techniques with application to anisotropic problems. Hampton, Va: Institute for Computer Applications in Science and Engineering, 1995.

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Mavriplis, Dimitri. Large-scale parallel unstructured mesh computations for 3D high-lift analysis. Hampton, VA: Institute for Computer Applications in Science and Engineering, NASA Langley Research Center, 1999.

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Anderson, W. Kyle. Aerodynamic design optimization on unstructured grids with a continuous adjoint formulation. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1997.

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Jahangirian, Alireza. Unstructured grid generation and flow adaptation for two-dimensional compressible aerodynamic flows. Manchester: UMIST, 1997.

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Djomehri, M. Jahed. An assessment of the adaptive unstructured tetrahedral grid, Euler flow solver code FELISA. Moffett Field, Calif: Ames Research Center, 1994.

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Lessard, Wendy B. Subsonic analysis of 0.04-scale F-16XL models using an unstructured Euler code. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1996.

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Mavriplis, Dimitri. Multigrid approaches to non-linear diffusion problems on unstructured meshes. Hampton, Va: Institute for Computer Applications in Science and Engineering, NASA Langley Research Center, 2001.

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Book chapters on the topic "Unstructured grid"

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Nakahashi, Kazuhiro. "Progress in Unstructured-Grid CFD." In Computational Fluid Dynamics 2000, 3–13. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-642-56535-9_1.

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Marcum, David L., and J. Adam Gaither. "Unstructured Grid Generation for Aerospace Applications." In Computational Aerosciences in the 21st Century, 189–209. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-010-0948-5_10.

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Hota, Chittaranjan, Vikram Nunia, Mario Di Francesco, Jukka K. Nurminen, and Antti Ylä-Jääski. "Enhanced Search in Unstructured Peer-to-Peer Overlay Networks." In Grid and Pervasive Computing, 270–79. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-38027-3_29.

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Bao, Xiuguo, Binxing Fang, and Mingzeng Hu. "Cocktail Search in Unstructured P2P Networks." In Grid and Cooperative Computing - GCC 2004 Workshops, 286–93. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-30207-0_36.

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Burgess, D. A., P. I. Crumpton, and M. B. Giles. "A Parallel Framework for Unstructured Grid Solvers." In Programming Environments for Massively Parallel Distributed Systems, 97–106. Basel: Birkhäuser Basel, 1994. http://dx.doi.org/10.1007/978-3-0348-8534-8_10.

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Suzuki, Masahiro. "An Attempt to the Surface Grid Generation Based on Unstructured Grid." In Proceedings of the Ninth GAMM-Conference on Numerical Methods in Fluid Mechanics, 396–403. Wiesbaden: Vieweg+Teubner Verlag, 1992. http://dx.doi.org/10.1007/978-3-663-13974-4_38.

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Nochetto, R. H., A. Schmidt, and C. Verdi. "Adaptive Solution of Phase Change Problems Over Unstructured Tetrahedral Meshes." In Grid Generation and Adaptive Algorithms, 163–81. New York, NY: Springer New York, 1999. http://dx.doi.org/10.1007/978-1-4612-1556-1_10.

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Shestakov, Aleksei I., and Jose L. Milovich. "Parallelization of an unstructured grid, hydrodynamic-diffusion code." In Solving Irregularly Structured Problems in Parallel, 182–93. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/bfb0018538.

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Fortin, F., and D. J. Jones. "Unstructured Grid Solutions using k-∈ with Wall Functions." In Notes on Numerical Fluid Mechanics (NNFM), 496–502. Wiesbaden: Vieweg+Teubner Verlag, 1998. http://dx.doi.org/10.1007/978-3-322-89859-3_53.

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Dervieux, A., J. A. Desideri, L. Fezoui, M. V. Salvetti, M. Mallet, J. Periaux, and B. Stoufflet. "Unstructured-Grid Algorithms for High-Speed CFD Analysis." In Advances in Hypersonics, 62–168. Boston, MA: Birkhäuser Boston, 1992. http://dx.doi.org/10.1007/978-1-4612-0375-9_3.

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Conference papers on the topic "Unstructured grid"

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LOEHNER, RAINALD, JOSE CAMBEROS, and MARSHAL MERRIAM. "Parallel unstructured grid generation." In 10th Computational Fluid Dynamics Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1991. http://dx.doi.org/10.2514/6.1991-1582.

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Chen, C., K. Szema, and S. Chakravarthy. "Optimization of unstructured grid." In 33rd Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1995. http://dx.doi.org/10.2514/6.1995-217.

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SUZUKI, MASAHIRO. "Surface grid generation based on unstructured grid." In Flight Simulation Technologies Conference and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1990. http://dx.doi.org/10.2514/6.1990-3052.

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Contreras, J., R. Corral, J. Fernandez-Castan˜eda, G. Pastor, and C. Vasco. "Semi-Unstructured Grid Methods for Turbomachinery Applications." In ASME Turbo Expo 2002: Power for Land, Sea, and Air. ASMEDC, 2002. http://dx.doi.org/10.1115/gt2002-30572.

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A semi-unstructured grid generation system specially designed for the meshing of blade passages is presented. The method retains most of the flexibility of unstructured hybrid grids but is used in a similar way than the traditional structured methods allowing a smooth transition in the design offices from structured to unstructured technology. The advantages and disadvantages of structured and unstructured methods are briefly revisited.
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Woan, Chung-Jin. "Unstructured surface grid generation on unstructured quilt of patches." In Fluid Dynamics Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1995. http://dx.doi.org/10.2514/6.1995-2202.

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Bahrainian, Seyed Saied, and Zahra Mehrdoost. "A Novel Hybrid Approach for Unstructured Viscous Grid Generation." In ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2010. http://dx.doi.org/10.1115/esda2010-24325.

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Accurate solution of boundary layer and wake flow require generation of high aspect ratio grids in these regions. A hybrid approach for the efficient generation of inviscid and viscous unstructured grids has been introduced. A novel feature of the current work is its ability to produce boundary layer and wake grids that enables accurate flow solutions in viscous flow regions. The grid generation algorithm starts with a very coarse initial grid. In the inviscid region, isotropic cells of excellent quality are produced using a combination of point insertion and cell subdivision techniques. Simultaneously, a directional grid refinement strategy is used to construct highly stretched triangular cells in viscous regions. First, anisotropic unstructured grids are produced in the stream wise direction. Then, cells close to the solid surface are refined to highly stretched layer of triangles suitable for boundary layer region. Smooth transition between the boundary layer grid and the outer isotropic grid is easily obtained with a user specified cell size and stretch. The accuracy of the current grid generation approach is assessed by laminar and turbulent compressible flow solutions around NACA0012 and RAE2822 airfoils. The results of the numerical flow simulations are compared with published experimental and numerical data. Comparisons point to the ability of the proposed unstructured boundary layer and wake grid generation procedure.
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Mazaheri, Ali, and Bil Kleb. "Exploring Hypersonic, Unstructured-Grid Issues through Structured Grids." In 18th AIAA Computational Fluid Dynamics Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2007. http://dx.doi.org/10.2514/6.2007-4462.

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Solano-Quinde, Lizandro, Zhi Jian Wang, Brett Bode, and Arun K. Somani. "Unstructured grid applications on GPU." In the Fourth Workshop. New York, New York, USA: ACM Press, 2011. http://dx.doi.org/10.1145/1964179.1964197.

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Xia, Guoping, Ding Li, and Charles Merkle. "Grid adaptation on unstructured meshes." In 39th Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2001. http://dx.doi.org/10.2514/6.2001-443.

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Tsolakis, Christos, Nikos Chrisochoides, Michael A. Park, Adrien Loseille, and Todd R. Michal. "Parallel Anisotropic Unstructured Grid Adaptation." In AIAA Scitech 2019 Forum. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2019. http://dx.doi.org/10.2514/6.2019-1995.

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Reports on the topic "Unstructured grid"

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Baptista, Antonio M., and Cheryl A. Blain. Adaptive Unstructured Grid Generation for Modeling of Coastal Margins. Fort Belvoir, VA: Defense Technical Information Center, September 1999. http://dx.doi.org/10.21236/ada613940.

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Anninos, P. Kull ALE: II. Grid Motion on Unstructured Arbitrary Polyhedral Meshes. Office of Scientific and Technical Information (OSTI), February 2002. http://dx.doi.org/10.2172/15006517.

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Wang, Z. J. An Automated Viscous Unstructured Adaptive Cartesian Grid Generation Method for Complex Geometries. Fort Belvoir, VA: Defense Technical Information Center, August 1998. http://dx.doi.org/10.21236/ada384480.

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Yang, Zhaoqing, Wei-Cheng Wu, and Taiping Wang. Model Test Bed for Evaluating Unstructured-Grid Wave Models for Resource Assessment and Characterization. Office of Scientific and Technical Information (OSTI), October 2017. http://dx.doi.org/10.2172/1630729.

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Chapman, Raymond S., Terry K. Gerald, and Mark S. Dortch. Water Quality Research Program: Development of Unstructured Grid Linkage Methodology and Software for CE-QUAL-ICM. Fort Belvoir, VA: Defense Technical Information Center, August 1997. http://dx.doi.org/10.21236/ada329729.

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Johnsson, S. L. Efficient Load Balance & Locality of Reference for Unstructured Grid & Particle Simulations on Massively Parallel Processors. Fort Belvoir, VA: Defense Technical Information Center, November 1995. http://dx.doi.org/10.21236/ada311016.

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Dovey, D. J., and T. E. Spelce. GRIZ: Finite element analysis results visualization for unstructured grids. User manual. Office of Scientific and Technical Information (OSTI), October 1993. http://dx.doi.org/10.2172/10143386.

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Shapira, Yair. Domain decomposition multigrid for unstructured grids. Office of Scientific and Technical Information (OSTI), January 1997. http://dx.doi.org/10.2172/420366.

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Westerink, Joannes J., Clint Dawson, and Rick A. Luettich. Wave and Circulation Prediction on Unstructured Grids. Fort Belvoir, VA: Defense Technical Information Center, September 2006. http://dx.doi.org/10.21236/ada613067.

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Westerink, Joannes J., Clint Dawson, and Rick A. Luettich. Wave and Circulation Prediction on Unstructured Grids. Fort Belvoir, VA: Defense Technical Information Center, September 2007. http://dx.doi.org/10.21236/ada573381.

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