Modeling of the behavior of water and soot contaminated oils in the terahertz range

Stefan Gorenflo; Ulrike Tauer; Iliyana Hinkov; Armin Lambrecht; Hanspeter Helm

doi:10.1117/12.661491

19 April 2006 Modeling of the behavior of water and soot contaminated oils in the terahertz range

Stefan Gorenflo, Ulrike Tauer, Iliyana Hinkov, Armin Lambrecht, Hanspeter Helm

Proceedings Volume 6194, Millimeter-Wave and Terahertz Photonics; 619407 (2006) https://doi.org/10.1117/12.661491
Event: SPIE Photonics Europe, 2006, Strasbourg, France

Abstract

Terahertz Time-Domain Spectroscopy (THz-TDS) is used to investigate water and soot contaminations in oils, exhibiting different dilution modes. For synthetic polyglycol oils, the water is dissolved due to the polar behavior of the oil, whereas in non polar mineral oils the water-oil compound forms an emulsion. This behavior is modeled with an effective medium approximation (EMA) formalism. Small soot agglomerates are remaining in suspension when mineral oils are polluted with soot particles. In this case, the absorption spectrum is dominated by scattering effects. Due to the small particle size of the soot agglomerates compared to the THz wavelength, coherent scattering is the dominant process.

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Stefan Gorenflo, Ulrike Tauer, Iliyana Hinkov, Armin Lambrecht, and Hanspeter Helm "Modeling of the behavior of water and soot contaminated oils in the terahertz range", Proc. SPIE 6194, Millimeter-Wave and Terahertz Photonics, 619407 (19 April 2006); https://doi.org/10.1117/12.661491

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KEYWORDS

Water

Terahertz radiation

Absorption

Scattering

Particles

Minerals

Refractive index

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