ArticlePhotoacoustics2025
Non-destructive inspection of oil-water two-phase systems by terahertz optoacoustics.
Article in Photoacoustics, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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7 authors.
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Abstract
Accurate determination of water-oil ratios in multiphase systems faces persistent challenges in achieving non-invasive global measurements due to the intrinsic limitations of conventional detection modalities. We develop a terahertz optoacoustic method that enables real-time quantification of water-oil ratios across the full operational range (0-100 %) in both static and dynamic regimes. For quiescent systems, the technique achieves spatially resolved mapping of phase distributions through terahertz optoacoustic imaging while simultaneously monitoring emulsion destabilization dynamics-key for assessing storage stability. In dynamic pipeline flows, we establish a dual-parameter detection paradigm: signal intensity linearity (R²=0.985) characterizes slug flow patterns, whereas time-delay correlation (R²=0.996) deciphers stratified flow configurations. The technique's unique combination of non-ionizing terahertz excitation and plastic-penetrating ultrasonic detection establishes a new paradigm for in situ monitoring in petroleum refining and edible oil processing, particularly through opaque polymer pipelines.
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