Flow Pattern Transition During Gas Liquid Upflow Through Vertical Concentric Anulli-Part II : Mechanistic Models  

Oleh:

Das, G. ; Das, P. K. ; Purohit, N. K. ; Mitra, A. K.

Jenis: Article from Bulletin/Magazine
Dalam koleksi: Journal of Fluids Engineering vol. 121 no. 4 (1999), page 902-907.
Topik: FLOW METERS; flow pattern; transition; gas liquid; vertical concentric; annuli; mechanistic models

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ89.1 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

In this paper the transition boundaries between different flow regimes during cocurrent upflow of gas liquid two - phase mixture through concentric annuli has been predicted theoretically. On the basis of the experimental observations (Das et al., 1999), mechanistic models have been proposed to formulate mathematical equations of the regime boundaries as functions of the annulus dimensions, the physical properties, and velocities of the two phases. The analysis has yielded the bubbly - slug transition to occur at a limiting void fraction of 0.2, and the slug - churn transition to occur due to flooding of the liquid films by the Taylor bubbles. A comparison of the model predictions with experimental data corroborate the suitability of the proposed mechanisms.

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