Experimental study on two-phase flow and pressure drop in millimeter-size channels

K. Pehlivan, Ibrahim Hassan, M. Vaillancourt

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

The present paper provides considerable insight into the structure of two-phase flow as well as its characteristics inside mini- and micro-channels. A new test facility was designed and constructed to investigate the two-phase flow regimes and pressure drop in mini- and micro-channels. The two-phase frictional pressure drop measurements and flow regimes experiments were performed with three different test sections, which are 3 mm, 1 mm, and 800 μm in diameter. The experimental pressure drop data was compared with the homogenous model, the Friedel [L. Friedel, Improved friction pressure drop correlations for horizontal and vertical two-phase pipe flow, Paper E2, European Two-Phase Group Meeting, Ispra, Italy, 1979] model, and the Chisholm [D. Chisholm, A theoretical basis for the Lockhart Martinelli Correlation for two-phase flow, Int. J. Heat Mass Transfer, 10, 1967, pp. 1767-1778] model, in order to determine their validity range in mini- and micro-channel flows. The homogenous model and the Chisholm [D. Chisholm, A theoretical basis for the Lockhart Martinelli Correlation for two-phase flow, Int. J. Heat Mass Transfer, 10, 1967, pp. 1767-1778] model showed the most similarities with the data acquired for the 1 mm and 0.8 mm test sections, while the Friedel [L. Friedel, Improved friction pressure drop correlations for horizontal and vertical two-phase pipe flow, Paper E2, European Two-Phase Group Meeting, Ispra, Italy, 1979] model over-predicted the pressure drop for every test section. The two-phase flow patterns were observed for high gas superficial velocities (UGS {greater than or slanted equal to} 10 m/s) using a 3CCD analog camera, and comparisons were made with the existing flow regime maps. The present data, as well as the available data in literature, were used to develop a simplified flow regime map for horizontal micro-channels. The flow regimes in this map were separated into surface-tension-dominated regimes and inertia-dominated regimes. The regimes were named bubbly, intermittent, churn and annular. The intermittent flow regime regroups all slug and plug flows, as well as all the transition flows occurring in the vicinity of the intermittent region. It was found that the simplified transition lines provide a good approximation of the regime transitions for all existing studies within the allowable range of the map.

Original languageEnglish
Pages (from-to)1506-1514
Number of pages9
JournalApplied Thermal Engineering
Volume26
Issue number14-15
DOIs
Publication statusPublished - Oct 2006
Externally publishedYes

Fingerprint

Two phase flow
Pressure drop
Pipe flow
Mass transfer
Friction
Transition flow
Channel flow
Test facilities
Flow patterns
Surface tension
Cameras
Gases
Experiments
Hot Temperature

Keywords

  • Experimental data
  • Flow regimes
  • Pressure drop
  • Two-phase flow

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Mechanical Engineering

Cite this

Experimental study on two-phase flow and pressure drop in millimeter-size channels. / Pehlivan, K.; Hassan, Ibrahim; Vaillancourt, M.

In: Applied Thermal Engineering, Vol. 26, No. 14-15, 10.2006, p. 1506-1514.

Research output: Contribution to journalArticle

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