CHAPARRAL: A library for solving large enclosure radiation heat transfer problems

Glass, Micheal W.

doi:10.2172/120875

Cited by 18 publications

(27 citation statements)

References 2 publications

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“…Each stage begins by computing a matrix of viewfactors, G i j , between each surface i and all other surfaces j. As described above in Section 3.1 this is currently done by calling routines in Chaparral [9]. Parts (b) and (c) of each stage are implicitly coupled through the reaction rates at the surface.…”

Section: Level-set Solution Methodsmentioning

confidence: 99%

“…where F is the vector of fluxes of each species to the feature surface, F 0 0 is the vector of fluxes to the hypothetical gas surfaces, G is a matrix of view factors between surface elements on the feature surface, G 0 is the matrix of view factors between surface elements on the feature surface and feature elements on the hypothetical gas boundary, G 0 is the complement to G 0 [9], G 0 0 is the matrix of view factors between surface elements on the hypothetical gas boundary, and R and R 0 are the reaction rates on the feature surface and the hypothetical gas boundary surface elements respectively.…”

Section: Ballistic Transport and Reaction Modelmentioning

confidence: 99%

“…In ChISELS 1.0, these viewfactors are calculated by calling routines in Chaparral [9], a Sandia developed library package originally written for solving large three-dimensional enclosure radiation heat transfer problems. Like ChISELS 1.0, the current version of Chaparral is also designed for use on parallel machines using the standard MPI library.…”

Section: View-factor Calculationmentioning

confidence: 99%

“…A computationally significant aspect of this method is the need to calculate view-factors of the radiation-like BTRM problem in the modeling domain. For this purpose, the mathematical and numerical techniques described and implemented in Chaparral [9] are employed.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

ChISELS 1.0: theory and user manual :a theoretical modeler of deposition and etch processes in microsystems fabrication.

Plimpton¹,

Schmidt²,

Ho³

et al. 2006

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Chemically Induced Surface Evolution with Level-Sets-ChISELS-is a parallel code for modeling 2D and 3D material depositions and etches at feature scales on patterned wafers at low pressures. Designed for efficient use on a variety of computer architectures ranging from single-processor workstations to advanced massively parallel computers running MPI, ChIS-ELS is a platform on which to build and improve upon previous feature-scale modeling tools while taking advantage of the most recent advances in load balancing and scalable solution algorithms. Evolving interfaces are represented using the level-set method and the evolution equations time integrated using a Semi-Lagrangian approach [1]. The computational meshes used are quad-trees (2D) and oct-trees (3D), constructed such that grid refinement is localized to regions near the surface interfaces. As the interface evolves, the mesh is dynamically reconstructed as needed for the grid to remain fine only around the interface. For parallel computation, a domain decomposition scheme with dynamic load balancing is used to distribute the computational work across processors. A ballistic transport model is employed to solve for the fluxes incident on each of the surface elements. Surface chemistry is computed by either coupling to the CHEMKIN software [2] or by providing user defined subroutines.This report describes the theoretical underpinnings, methods, and practical use instruction of the ChISELS 1.0 computer code.

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Section: Level-set Solution Methodsmentioning

confidence: 99%

Section: Ballistic Transport and Reaction Modelmentioning

confidence: 99%

Section: View-factor Calculationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

ChISELS 1.0: theory and user manual :a theoretical modeler of deposition and etch processes in microsystems fabrication.

Plimpton¹,

Schmidt²,

Ho³

et al. 2006

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“…View factors for the model system are pre-calculated using the CHAPARRAL program [43]. Thus the geometric relationships among the modules are implicitly specified via the view factors, but can be changed by a knowledgeable user.…”

Section: A Prototype Entero Environment For Coupled Thermal-electricamentioning

confidence: 99%

On the Development of a Java-Based Tool for Multifidelity Modeling of Coupled Systems: LDRD Final Report

Gardner¹,

Castro²,

Hennigan³

et al. 2002

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This report describes research and development of methods to couple vastly different subsystems and physical models and to encapsulate these methods in a Java TM -based framework. The work described here focused on developing a capability to enable design engineers and safety analysts to perform multifidelity, multiphysics analyses more simply. In particular this report describes a multifidelity algorithm for thermal radiative heat transfer and illustrates its performance. Additionally, it describes a module-based computer software architecture that facilitates multifidelity, multiphysics simulations. The architecture is currently being used to develop an environment for modeling the effects of radiation on electronic circuits in support of the FY

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Solution strategies for coupled conduction/radiation problems

Hogan

Gartling

2007

Commun. Numer. Meth. Engng.

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SUMMARYSolution strategies and algorithms for solving coupled systems of equations that arise from the finite element formulation of heat conduction and enclosure radiation problems are presented and evaluated. Solution methods that vary from sequential equation processing to fully coupled procedures are tested for convergence, robustness and computational efficiency, in both transient and time-independent modeling situations.

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CHAPARRAL: A library for solving large enclosure radiation heat transfer problems

Cited by 18 publications

References 2 publications

ChISELS 1.0: theory and user manual :a theoretical modeler of deposition and etch processes in microsystems fabrication.

ChISELS 1.0: theory and user manual :a theoretical modeler of deposition and etch processes in microsystems fabrication.

On the Development of a Java-Based Tool for Multifidelity Modeling of Coupled Systems: LDRD Final Report

Solution strategies for coupled conduction/radiation problems

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