Randomized trial demonstrates accurate liquid film measurement on heated rods, suggesting improved thermal-hydraulic testing options.
• A capacitance-based sensor measures the liquid film thickness on a heated heater rod surface. • The sensor enables non-intrusive, multipoint film measurement in complex high-temperature, high-pressure rod bundles. • Experimental validation shows consistency with laser focus displacement meter data. • The sensor accurately measures liquid film thickness on both heated and unheated rods. • Findings expand multidimensional measurement options in simulated nuclear fuel assemblies and thermal-hydraulic tests.
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Ueda et al. (2026) studied this question.
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