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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/17748
Title: Multigroup correlated-k distribution method for nonequilibrium atomic radiation
Authors: Bansal, Ankit
Modest M.F.
Levin D.A.
Published in: Journal of Thermophysics and Heat Transfer
Abstract: Accurate and efficient modeling of shock-layer radiative heat loads is critical for many spacecraft designs. A correlated-k distribution method has been developed for the most important atomic species (N and O), which provides great accuracy with high numerical efficiency for the evaluation of radiative transfer in a hot plasma. Challenges posed by typical nonequilibrium gas conditions and extreme concentration and temperature gradients in the shock layer were overcome by splitting the full spectrum into a number of nonoverlapping part spectra. Results for one-dimensional nonhomogeneous gas slabs are presented, comparing line-by-line benchmarks with the fullspectrum correlated-k model, showing very good accuracy with a maximum error of 2-3% for the stagnation-line flowfield of the Stardust vehicle and more severe nonhomogeneous two-cell problems. © 2010 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.
Citation: Journal of Thermophysics and Heat Transfer, (2010), 638- 646
URI: https://doi.org/10.2514/1.46641
http://repository.iitr.ac.in/handle/123456789/17748
Issue Date: 2010
Keywords: Atomic radiation
Atomic species
Cell problems
Correlated-k distribution method
Full-spectrum
Gas conditions
Hot plasmas
K-models
Maximum error
Multi-group
Non equilibrium
Non-homogeneous
Numerical efficiency
Radiative heat loads
Shock layer
Spacecraft design
Temperature gradient
ISSN: 8878722
Author Scopus IDs: 56650604800
7006681520
7202969166
Author Affiliations: Bansal, A., Pennsylvania State University, University Park, PA 16802, United States, Department of Mechanical Engineering, United States
Modest, M.F., Pennsylvania State University, University Park, PA 16802, United States, Department of Mechanical Engineering, United States
Levin, D.A., Pennsylvania State University, University Park, PA 16802, United States, Department of Aerospace Engineering, United States
Funding Details: The research performed at the Pennsylvania State University was supported by NASA through grant no. NNX07AC47A.
Corresponding Author: Bansal, A.; Pennsylvania State University, University Park, PA 16802, United States; email: azb162@psu.edu
Appears in Collections:Conference Publications [ME]

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