Peter Eiseman

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Since 1989 - Present, Program Development Company, President Product: The GridPro Software Suite1981-1989 - Columbia University, Professor of Applied Physics1979-1981 - NASA Langley Research Center, Research Scientist1973-1978 - United Technologies Research Center (UTRC), Research Scientist1970-1973 - United States Air Force, Kirtland AFB, Captain

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M.E. Hogan

Wells College

David Seamon

Kansas State University

Armando Marques-Guedes

UNL - New University of Lisbon

Ehsan Erfani

Desert Research Institute

Siraj Uddin

King AbdulAziz University (KAU) Jeddah, Saudi Arabia

Saulo Xavier de Souza

Centro Universitário do Distrito Federal – UDF Biblioteca Governador Eurico

Nikos Mantzakouras

National & Kapodistrian University of Athens

Sabrina Speich

École Normale Supérieure

Yongchao Yang

Los Alamos National Laboratory

Medha Huilgol

Bangalore University

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Papers by Peter Eiseman

Conference Proceedings of Applications of Mesh Generation to Complex 3-D Configurations Held at the Specialists' Meeting of the Fluid Dynamics Panel in Leon, Norway on 24th-25th May 1989

: The AGARD Fluid Dynamics Panel sponsored this Symposium to provide a survey of the capabilities... more : The AGARD Fluid Dynamics Panel sponsored this Symposium to provide a survey of the capabilities of the CFD community for griding complex 3-D configurations. The intent was to provide some insight to the present state of grid generation for complex configurations to help assess whether this task presents a long-term stumbling block to the routine use of CFD in aerodynamic applications. To this end, the meeting was structured in five sessions: General Surveys, Algebraic Grid Generation, Block Structured Meshes, Multiblock-Adaptive Meshes and Unstructured Meshes. Twenty-two papers from these sessions amply demonstrated that the viability of a numerical solution depends directly on the quality of the mesh and surface representation as measured by its spacing an resolution. Of particular interest was the mesh generation for complex configurations, such as advanced fighter or transport aircraft, missiles and space vehicles, where complex geometries and /or complex flowfields have to be ...

Examples of grid generation with implicitly specified surfaces using GridPro (TM)/az3000. 1: Filleted multi-tube configurations

With examples, we illustrate how implicitly specified surfaces can be used for grid generation wi... more With examples, we illustrate how implicitly specified surfaces can be used for grid generation with GridPro/az3000. The particular examples address two questions: (1) How do you model intersecting tubes with fillets? and (2) How do you generate grids inside the intersected tubes? The implication is much more general. With the results in a forthcoming paper which develops an easy-to-follow procedure for implicit surface modeling, we provide a powerful means for rapid prototyping in grid generation.

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Grid Generation on Surfaces in Three Dimensions

TECHNICAL CONTE~~T Under the NAVSEA project entitled "Grid Generations on Surfaces in Three-... more TECHNICAL CONTE~~T Under the NAVSEA project entitled "Grid Generations on Surfaces in Three-Dimensions" and administered by NASA as grant NAG-1-617, the development of a surface grid generation algorithm was initiated. In the initial research, the basic adaptive movement technique of mean-value-relaxation

Interactive high quality grid generation

We generate high quality grids interactively on a computer workstation through optimization for s... more

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Solution adaptive grid generation

$Research paper thumbnail of Interactive topology generation and grid viewer for GridPro{reg_sign}/az3000$

Interactive topology generation and grid viewer for GridPro{reg_sign}/az3000

A powerful interactive graphical manager has been established for GridPro{reg_sign}/az3000, the m... more A powerful interactive graphical manager has been established for GridPro{reg_sign}/az3000, the multiblock grid generation system which is fully automatic once a grid topology is given. While the generation of grid topology represents a substantially smaller task, the next question is how fast and easily can that task be accomplished. The answer given here comes with the use of interactive graphics. The subject of this paper is even more inclusive since the integrated use of graphics is employed to manage the entire grid generation process.

Derivations of Function Algebras

52 p.Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1970.U of I OnlyRestricted to th... more

High Lift CRM Locally Structured Grid Generation with GridPro

3D Wind Turbine Simulations Over a Wavy Sea

Grid generation for the solution of partial differential equations(Final Report)

I I of Partial A general survey of grid generation is presented with a concern for understanding ... more I I of Partial A general survey of grid generation is presented with a concern for understanding why grids are necessary, how they are applied, and how they are generated. After an examination of the need for such meshes, the overall applications setting is established with a categorization of the various connectivity patterns. This is split LvetWee~; structured grids and unstructured meshes. Altogether, the categorization establishes the foundation upon which grid generation techniques are developed. The two primary categories are algebraic techniques and partial differential equation techniques. These are each split into basic parts, and accordingly are individually examined in some detail. In the process, the interrelations between the various parts are accented. From the established background in the primary techniques, consideration is shifted to the topic of interactive grid generation and then to adaptive meshes. The setting for adaptivity is established with a suitable means to monitor severe solution behavior. Adaptive grids are considered first and are followed by adaptive triangular meshes. Then the consideration shifts to the temporal coupling between grid generators and PDE-solvers. To conclude, a reflection upon the discussion, herein, is given.

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Numerical Methods of Solving Fluid Dynamic Equations

Handbook of Fluid Dynamics and Fluid Machinery, 2009

A Method for Computing Three-Dimensional Viscous Flows over an Ogival Body at Angle of Attack

A method for computing three-dimensional flow over an ogival body at angle of attack is described... more A method for computing three-dimensional flow over an ogival body at angle of attack is described. An approximate set of governing equations is derived for viscous flows which have a primary flow direction. The derivation is done in a coordinate independent manner, and the resulting equations are expressed in terms of tensors. In keeping with the inherent generality of the tensor formulation, a two-level second-order accurate marching procedure is derived for general tensorlike equations. With this procedure, a three-diiEMsional turbulent flow can be solved in any coordinate system by marching along the assumed primary flow direction. General tube-like coordinates are developed for a class of geometries applicable to flows between tubular surfaces. The coordinates are then particularized to the flow field bounded between an ogival body at angle of attack and its bow shock. Unlike the ogival body surface, the bow shock surface is not known in advance of the solution but instead must be computed as the solution develops. One marching step of the solution process is broken down into several steps. First, the bow shock surface is discretely extended by an iteration of explicit local solutions. The bow shock surface is then smoothly extended to provide a best fit to the discrete shock data. Tube-like coordinates are generated and finally the second order numerical scheme is applied to advance the fully viscous solution to the next station.

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Development of a three-dimensional turbulent duct flow analysis

of 105 and an inlet Mach number of 0.1. One case had a circular cross section, the other an ellip... more

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Numerical grid generation in computational field simulations. Volume 1

To enhance the CFS technology to its next level of applicability (i.e., to create acceptance of C... more To enhance the CFS technology to its next level of applicability (i.e., to create acceptance of CFS in an integrated product and process development involving multidisciplinary optimization) the basic requirements are: rapid turn-around time, reliable and accurate simulation, affordability and appropriate linkage to other engineering disciplines. In response to this demand, there has been a considerable growth in the grid generation related research activities involving automization, parallel processing, linkage with the CAD-CAM systems, CFS with dynamic motion and moving boundaries, strategies and algorithms associated with multi-block structured, unstructured, hybrid, hexahedral, and Cartesian grids, along with its applicability to various disciplines including biomedical, semiconductor, geophysical, ocean modeling, and multidisciplinary optimization.

Hypersonic simulation of a free-flying ring interfering with a two-dimensional curved shock wave

25th AIAA International Space Planes and Hypersonic Systems and Technologies Conference

Hybrid Grid Generation Using NW Grid

by Dr Joseph Oliveira and Peter Eiseman

Hybrid Grid Generation Using NW Grid

by Dr Joseph Oliveira and Peter Eiseman

We describe the development and use of a hybrid n-dimensional grid generation system called NWGRI... more We describe the development and use of a hybrid n-dimensional grid generation system called NWGRID. The Applied Mathematics Group at Pacific Northwest National Laboratory (PNNL) is developing this tool to support the Laboratory's computational science efforts in chemistry, biology, engineering and environmental (subsurface and atmospheric) modeling. NWGRID is the grid generation system, which is designed for multi-scale, multi-material, multi-physics, time-dependent, 3-D, hybrid grids that are either statically adapted or evolved in time. NWGRID'S capabilities include static and dynamic grids, hybrid grids, managing colliding surfaces, and grid optimization[using reconnections, smoothing, and adaptive mesh refinement (AMR) algorithms]. NWGRID'S data structure can manage an arbitrary number of grid objects, each with an arbitrary number of grid attributes. NWGRID uses surface geometry to build volumes by using combinations of Boolean operators and order relations. Point d...

2 Multiblock Grid Generation and Parallelization

12.1 Overview 12.2 Multiblock Grid Generation and Parallelization 12.3 Computational Aspects of M... more 12.1 Overview 12.2 Multiblock Grid Generation and Parallelization 12.3 Computational Aspects of Multiblock Grids 12.4 Description of the Standard Cube 12.5 Topology File Format for Multiblock Grids 12.6 Local Grid Clustering Using Clamp Technique 12.7 A Grid Generation Meta Language Topology Input Language 12.8 Parallelization Strategy for Complex Geometry Message Passing for Multiblock Grids • Parallel Machines and Computational Fluid Dynamics 12.9 Parallel Efficiency for Multiblock Codes 12.10 Parallel Solution Strategy: A Tangled Web Parallel Numerical Strategy • Time Stepping Procedure • Parallel Solution Strategy • Solving Systems of Linear Equations: The CG Technique • Basic Description of GMRES 12.11 Future Work in Parallel Grid Generation and CFD

Interactive grid generation with control points

Computing Systems in Engineering

Improved Modeling Tools For High Speed Reacting Flows

Conference Proceedings of Applications of Mesh Generation to Complex 3-D Configurations Held at the Specialists' Meeting of the Fluid Dynamics Panel in Leon, Norway on 24th-25th May 1989