A Theoretical Model to Predict Pool Boiling CHF Incorporating Effects Contact Angle and Orientation  

Oleh:

Kandlikar, Satish G.

Jenis: Article from Bulletin/Magazine
Dalam koleksi: Journal of Heat Transfer vol. 123 no. 6 (Dec. 2001), page 1071-1079.
Topik: pool boiling; theoretical model; pool boiling; contact angle; orientation

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ90.2 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

A theoretical model is developed to desribe the hydrodynamic behaviour of the vapor - liquid interface of a bubble at the heater surface leading to the initiation of critial heat flux (CHF) condition. The momentum flux resulting from evaporation at the bubble base is identified to be an important parameter. A model based on theoretical considerations is developed for upward - facing surfaces with orientations of 0 deg (horizontal) to 90 deg (vertical). It includes the surface - liquid interaction effects through the dynamic receding contact angle. The CHF in pool boiling for water refrigerants and cryogenic liquids is correctly predicted by the model, and the parametric trends of CHF with dynamic receding contact angle and subcooling are also well represented.

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