Technical Briefs

A Hybrid Wavenumber Selection Scheme for Line-By-Line Photon Monte Carlo Simulations in High-Temperature Gases

[+] Author and Article Information
Tao Ren

e-mail: tren@ucmerced.edu

Michael F. Modest

e-mail: mmodest@eng.ucmerced.edu
Life fellow of ASME
Department of Mechanical Engineering and Applied Mechanics,
University of California,
Merced, Merced, CA 95343

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received August 16, 2012; final manuscript received April 24, 2013; published online July 10, 2013. Assoc. Editor: He-Ping Tan.

J. Heat Transfer 135(8), 084501 (Jul 10, 2013) (4 pages) Paper No: HT-12-1439; doi: 10.1115/1.4024385 History: Received August 16, 2012; Revised April 24, 2013

Recently, it has become possible to conduct line-by-line (LBL) accurate radiative heat transfer calculations in spectrally highly nongray combustion systems using the Monte Carlo method. LBL accuracy, in principle, adds little to the computational load as compared to gray calculations. However, when employing the Monte Carlo method, the original scheme for choosing appropriate emission wavenumbers for statistical photon bundles is numerically expensive. An improved wavelength selection scheme has been applied to hypersonic plasmas for Monte Carlo solvers. However, directly applying this improved scheme to combustion gases may cause significant errors. In this paper, a hybrid scheme for wavenumber selection is proposed, significantly decreasing CPU requirements compared to previous work. The accuracy of the new method is established and its time requirements are compared against the previous method.

Copyright © 2013 by ASME
Your Session has timed out. Please sign back in to continue.



Grahic Jump Location
Fig. 1

Recovery of pressure-based absorption coefficients by Monte Carlo method

Grahic Jump Location
Fig. 2

Random-number relations of 10% CO2-25%H2O-10%CO mixture at 600 K for the improved scheme using the η − Rη database as compared with the old scheme

Grahic Jump Location
Fig. 3

Divergence of radiative flux for 10% CO2-25%H2O-10%CO mixture at 600 K using the old scheme and the improved scheme

Grahic Jump Location
Fig. 4

Divergence of radiative flux for 10% CO2-10%H2O-10%CO mixture at 650 K using the old scheme and the improved scheme

Grahic Jump Location
Fig. 5

Random-number relations for 25%H2O at 600 K, 700 K, and linear interpolation values for 650 K using the Rη − η and the η − Rη database

Grahic Jump Location
Fig. 6

Divergence of radiative flux for 10% CO2-10%H2O-10%CO mixture at 650 K using the old scheme and the hybrid scheme




Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In