References
[1] Jawad, M. K., M.Sc Thesis ,University of Technology, Baghdad (1986).
[2] Mohamad, M. S., M.Sc Thesis ,University of Technology, Baghdad (1988).(Arabic Language)
[3] Mondal, S. N., and Das, S. K., Gas –Liquid Flow Through Coils, Korean J. Chem. Eng., 20(4), 624-630 (2003).
[4] Perry, R. H., D.W. Green, and J.O. Maloney, Perry’s Chemical Engineers Handbook, 7th ed., McGraw-Hill (1997).
[5] W.I.A. Aly, H. Inaba, N. Haruki, and A. Horibe, Experimental Study of Flow Drag and Heat Transfer of Drag-Reducing Surfactant solution in Helical pipes, 6thWord Conference on Experimental Heat Transfer, Fluid Mechanics, and Thermodynamics, April 17-21 (2005).
Tikrit Journal of Engineering Sciences (2007) 14(2) 86-101
A Study in Flow Characteristics of Liquid Falling Film in Spiral Tubes
Zaid A. Abdl-rahman | Ghassan Hamad Abdullah |
Chemical Eng. Dept., Tikrit University, Iraq |
Abstract
A study has been done on experimental investigation of the flow characteristic of water falling film in spiral tubes. The ratio of the surface film velocity to average film velocity (us/uF) is less than 1 for low angle of inclination (4-8 o) where as it increases as the angle of inclination increases reaching a value of about us/uF = 1.2 . This small value of the velocity ratio is due to the liquid film rotation in coil which causes some deletion. The film thickness (δ) experimental data correlated well bythe following equation: δ = 0.0048 ReF0.7064 sin-1/3θ ( with R2 = 0.959 )
Download Full-text PDF
Keywords: Coils, spiral tubes, falling film, hydrodynamic.