Flow regimes for condensation of a vapour inside a horizontal tube

Viscous Kelvin–Helmholtz instability analysis of liquid–vapor two-phase stratified flow for condensation in horizontal tubes

“…Several typical two-phase flow patterns including stratified flow, slug flow and annular flow were encountered during condensation inside a tube [1]. In the past several decades, a large number of water hammer events occurred at some certain flow patterns in the tube systems, resulting in equipment failure and property damage.…”

Condensation in Minichannels and Microchannels

“…• Criteria based on ratio of shear to gravity forces • All map boundaries vertical and horizontal lines-easy to use • Defined transition regions, rather than abrupt transitions Sardesai et al (1981) 24.4 mm R-113, steam, propane, methanol, n-pentane…”

“…Sardesai et al (1981) also investigated the annular-to-stratified/wavy transition for a variety of fluids (R-113, steam, propanol, methanol, and n-pentane) condensing in horizontal 24.4-mm-diameter tubes. 1:5; X , 1:0 Wavy=stratified flow j à g , 0:5; X , 1:0 Slug ðintermittentÞ flow j à g , 1:5; X .…”

“…Use the flow regime maps and transition criteria of Sardesai et al (1981), Tandon et al (1982), Dobson andChato (1998), Breber et al (1980), Soliman (1982Soliman ( , 1986, Garimella (2000a,b, 2003), and Cavallini et al (2002a), and compare and comment on the flow regimes predicted by each model. Use the flow regime maps and transition criteria of Sardesai et al (1981), Tandon et al (1982), Dobson andChato (1998), Breber et al (1980), Soliman (1982Soliman ( , 1986, Garimella (2000a,b, 2003), and Cavallini et al (2002a), and compare and comment on the flow regimes predicted by each model.…”

“…Sardesai et al (1981) Martinelli parameter, Tandon et al (1982) For the sample condition with G 5 400 kg/m 2 s and x 5 0.5, the required parameters are calculated below. Sardesai et al (1981) Martinelli parameter, Tandon et al (1982) For the sample condition with G 5 400 kg/m 2 s and x 5 0.5, the required parameters are calculated below.…”