Effect of counter current gas phase on liquid film

Abstract

Liquid film flow is very important in many industrial applications. However, there are few reports about its characteristics on structured packings. Therefore, in this paper, liquid film phenomena were investigated experimentally to exploit new approaches for intensifying the performance of the structured packings. All experiments were performed at room temperature. Water and air were the working fluids. The effect of counter current gas phase on the liquid film was taken into consideration. A high speed camera, a non-intrusive measurement technique, was used. It is shown that both liquid and gas phases have strong effects on film characteristics. In the present work, liquid film width increased by 57% because of increasing liquid flow rate, while it decreased by 25% resulting from the counter current gas phase.

Keywords

counter current / liquid film / two phases / structured packings

References

[1] Shi M G, Mersmann A, Effective interfacial area in packed columns. Ger Chem Eng, 1985, 8: 87-96

[2] Nicolaiewsky M A, Tavares F W, Rajagopal K, Fair J R. Liquid film flow and area generation in structured packed columns. Powder Technol, 1999, 104: 84-94

[3] Zhao L, Cerro R L. Experimental characterization of viscous flows over complex surfaces. Int J Multiphase Flow, 1992, 18: 495-516

[4] Shetty S A, Cerro R L. Flow of a thin film over a periodic surface. Int J Multiphase Flow, 1993, 19: 1013-1027

[5] Shetty S A, Cerro R L. Spreading of liquid point sources over inclined solid surfaces. Ind Eng Chem Res, 1995, 34: 4078-4086

[6] Shetty S A, Cerro R L. Spreading of a liquid point source over a complex surface. Ind Eng Chem Res, 1998, 37: 626-635

[7] Shetty S A, Cerro R L. Fundamental liquid flow correlations for the computation of design parameters for ordered packings. Ind Eng Chem Res, 1997, 36: 771-783

[8] Pierson F W, Whitaker S. Some theoretical and experimental observations of the wave structure of falling liquid films. Ind Eng Chem Fundam, 1977, 16(4): 401-408

[9] Nolwenn G P, Daerr A, Limat L. Meandering Rivulets on a Plane: A Simple Balance between Inertia and Capillarity. Phys Rev Lett, 2006, 96: 254503-254506

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Higher Education Press and Springer-Verlag Berlin Heidelberg