Publication detail

On the Selection of Integration Intervals for the Calculation of Mean Absorption Coefficients

KLOC, P. AUBRECHT, V. BARTLOVÁ, M. COUFAL, O. RÜMPLER, C.

Original Title

On the Selection of Integration Intervals for the Calculation of Mean Absorption Coefficients

Type

journal article in Web of Science

Language

English

Original Abstract

In radiation modeling of thermal plasmas non-grey models are applied where the radiative transport is described in several frequency bands (spectral intervals). Hereby mean absorption coefficients have to be calculated by a spectral integration procedure, providing a constant mean absorption coefficient for each band. Depending on the number of bands, one or more integration boundaries have to be selected in order to do the integration. In this paper we evaluate the influence of the selection of these integration boundaries on the mean absorption coefficient and the also radiation transfer by applying the mean absorption coefficients in a radiation transport model. Using a simplified two-band model we demonstrate that the selection of the integration boundary has a large impact on the total model accuracy. We show that in some cases selecting a band boundary right at the frequency where the continuum absorption shows a jump can introduce a significant error into the radiation calculation. The process of the integration interval selection thus demands a global optimization procedure to properly evaluate the boundaries of each frequency band.

Keywords

Radiative transfer, Arc, Air, Spectral absorption coefficient, Planck mean absorption, Discrete ordinates method

Authors

KLOC, P.; AUBRECHT, V.; BARTLOVÁ, M.; COUFAL, O.; RÜMPLER, C.

RIV year

2015

Released

18. 10. 2015

Publisher

Springer US

ISBN

0272-4324

Periodical

Plasma Chemistry and Plasma Processing

Year of study

35

Number

6

State

United States of America

Pages from

1097

Pages to

1110

Pages count

14

URL

http://link.springer.com/article/10.1007/s11090-015-9648-3

Full text in the Digital Library

http://hdl.handle.net/11012/201051

BibTex

@article{BUT117713,
  author="Petr {Kloc} and Vladimír {Aubrecht} and Milada {Bartlová} and Oldřich {Coufal} and Christian {Rümpler}",
  title="On the Selection of Integration Intervals for the Calculation of Mean Absorption Coefficients",
  journal="Plasma Chemistry and Plasma Processing",
  year="2015",
  volume="35",
  number="6",
  pages="1097--1110",
  doi="10.1007/s11090-015-9648-3",
  issn="0272-4324",
  url="http://link.springer.com/article/10.1007/s11090-015-9648-3"
}