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A single channel microdevice (Dh=230μm) was used in this study to measure the local wall temperature in a flow boiling configuration using thin-film (70nm titanium) thermistors. The device and experimental configuration allows the measurement of surface temperature with high spatial resolution and a temporal resolution in the kHz range with synchronized flow regime observation. A steady heat-flux...
A High frequency wall temperature measurement approach at the microscale is demonstrated. This experimental approach was implemented to study the transient effect of bubbles in a slug flow regime. Air stream was injected into liquid water flow in a 210 µm deep and 1.5 mm wide horizontal microchannel to form a slug flow regime (with bubble frequency of ∼280 Hz) and the associated wall temperature variations...
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