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An embedded boundary method for the modeling of unsteady combustion in an industrial gas-fired furnace

Description: A new methodology for the modeling of unsteady, nonpremixed, axisymmetric reacting flow in industrial furnaces is presented. The method is an extension of previous work by the authors to complex geometries, multistep kinetics mechanisms, and realistic properties, especially thermochemical data. The walls of the furnace are represented as an embedded boundary in a uniform, rectangular grid. The grid then consists of uniform rectangular cells except at the furnace wall where irregular (mixed) cel… more
Date: October 18, 1995
Creator: Pember, R. B.; Almgren, A. S.; Crutchfield, W. Y.; Howell, L. H.; Bell, J. B.; Colella, P. et al.
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Partner: UNT Libraries Government Documents Department
open access

An adaptive projection method for the modeling of unsteady, low-Mach number combustion

Description: In this paper the authors present an adaptive projection method for modeling unsteady, low-Mach reacting flow in an unconfined region. The equations they solve are based on a model for low-Mach number combustion that consists of the evolution equations for density, species concentrations, enthalpy, and momentum coupled with a constraint on the divergence of the flow. The algorithm is based on a projection methodology in which they first advance the evolution equations and then solve an elliptic… more
Date: October 1, 1997
Creator: Pember, R. B.; Howell, L. H.; Bell, J. B.; Colella, P.; Crutchfield, W. Y.; Fiveland, W. A. et al.
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Partner: UNT Libraries Government Documents Department
open access

An adaptive multifluid interface-capturing method for compressible flow in complex geometries

Description: We present a numerical method for solving the multifluid equations of gas dynamics using an operator-split second-order Godunov method for flow in complex geometries in two and three dimensions. The multifluid system treats the fluid components as thermodynamically distinct entities and correctly models fluids with different compressibilities. This treatment allows a general equation-of-state (EOS) specification and the method is implemented so that the EOS references are minimized. The current… more
Date: April 1, 1995
Creator: Greenough, J. A.; Beckner, V.; Pember, R. B.; Crutchfield, W. Y.; Bell, J. B. & Colella, P.
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Partner: UNT Libraries Government Documents Department
open access

Numerical simulation of a wave-guide mixing layer on a Cray C-90

Description: The development of a three-dimensional spatially evolving compressible mixing layer is investigated numerically using a parallel implementation of Adaptive Mesh Refinement (AMR) on a Cray C-90. The parallel implementation allowed the flow to be highly resolved while significantly reducing the wall-clock runtime. A sustained computation rate of 5.3 Gigaflops including I/O was obtained for a typical production run on a 16 processor machine. A novel mixing layer configuration is investigated where… more
Date: May 19, 1995
Creator: Greenough, J. A.; Crutchfield, W. Y. & Rendleman, C. A.
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Partner: UNT Libraries Government Documents Department
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