Bubble Coalescence in Pool Boiling on a Thin Foil Investigated by High-Speed Ir Thermography

Golobič, Iztok; Baselj, Matej; Papez, A.; Petkovsek, J.; Kenning, D. B. R.

doi:10.1615/ihtc13.p28.400

Cited by 4 publications

(3 citation statements)

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“…Theofanous et al [9,10] used a high-speed IR camera to observe dry spots, the wetted area and the temperature of dry spots temperature in pool boiling. Golobic et al [28] and Schweizer and Stephan [29] used an IR camera to measure the heat transfer distribution under single nucleating bubbles as they grew on a thin metal foils.…”

Section: Test Procedure Data Reduction and Uncertaintymentioning

confidence: 99%

“…These spots are consistent with individually nucleating bubbles within the liquid that grow and depart the surface within a few milliseconds (e.g., Refs. [16,28,[31][32][33]. For heat fluxes below CHF, it was observed that any local dry patches that appeared on the heating surface eventually disappeared as the surface was rewet.…”

Section: Local Surface Temperature and Heatmentioning

confidence: 99%

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Observations of the Critical Heat Flux Process During Pool Boiling of FC-72

Jung

Kim

2014

Journal of Heat Transfer

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Experimental work was undertaken to itivestigate the process by which pool-boiling critical heat flux (CHF) occurs using an IR camera to measure the local temperature and heat transfer coefficients on a heated silicon surface. The wetted area fraction (WF), the contact line length density (CLD), the frequency between dryout events, the lifetime of the dry patches, the speed of the advancing and receding contact lines, the dty patch size distribution on the surface, and the heat transfer from the liquid-covered areas were measured throughout the boiling curve. Quantitative analysis of this data at high heat flux and transition through CHF revealed that the boiling curve can simply be obtained by weighting the heat flux from the liquid-covered areas by WF. CHF mechanisms proposed in the literature were evaluated against the observations.

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Section: Test Procedure Data Reduction and Uncertaintymentioning

confidence: 99%

Section: Local Surface Temperature and Heatmentioning

confidence: 99%

Observations of the Critical Heat Flux Process During Pool Boiling of FC-72

Jung

Kim

2014

Journal of Heat Transfer

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“…43,44 IR thermography can only be used to measure surface temperatures and an accurate value of the emissivity of the medium is essential to obtain meaningful measurements, which can be a limitation in some applications. Highspeed infrared thermography [45][46][47] has been used to measure heater surface temperatures in nucleate boiling experiments as well, without significant exploration of the heat transfer mechanisms.…”

Section: Microscale Temperature Measurementmentioning

confidence: 99%