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RAD-13. Proceedings of the 7th International Symposium on Radiative Transfer
June, 2-8, 2013, Kusadasi, Turkey

DOI: 10.1615/ICHMT.2013.IntSympRadTransf


ISBN Print: 978-1-56700-280-5

ISSN Online: 2642-5629

ISSN Flash Drive: 2642-5661

LASER ABSORPTION TOMOGRAPHY RECONSTRUCTION THROUGH THE LEVEL SET METHOD

pages 217-230
DOI: 10.1615/ICHMT.2013.IntSympRadTransf.180
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RESUMO

Laser absorption tomography is an emerging diagnostic for mapping the concentration of a gaseous species. Since laser absorption measurements alone are insufficient to specify a unique concentration distribution reconstruction algorithms must incorporate additional information that promotes presumed physical attributes of the concentration distribution. This paper pioneers the application of the level set method to chemical species tomography. The species concentration distribution is initially represented by a signed distance function, which is progressively deformed by forces that scale with the difference between the measured and simulated absorption data as well as deviation from a spatially smooth solution. The final concentration distribution explains the laser absorption measurements and is also qualitatively consistent with mixed advection/diffusion transport. The algorithm is demonstrated by solving a simulated laser tomography experiment on a turbulent methane plume.

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