Hostname: page-component-848d4c4894-x5gtn Total loading time: 0 Render date: 2024-05-14T22:16:09.733Z Has data issue: false hasContentIssue false
  • English
  • Français

Flow development of a highly viscous fluid emerging from a slit onto a plate

Published online by Cambridge University Press:  19 April 2006

A. Stücheli
A. Stücheli
Affiliation:
Institut für Verfahrenstechnik, Swiss Federal Institute of Technology, Zurich, Switzerland Present address: Research Division 1536, Sulzer Brothers Ltd. 8400 Winterthur, Switzerland.
Get access Rights & Permissions [Opens in a new window]

Abstract

This paper is concerned with understanding the development of a free surface and the velocity of a thick creeping film emerging from a slit onto a plate. There is a difference between free surface flows with film thickness of 10 to 20 mm and thin film flows of less than 1 to 2 mm due to surface tension influence.

A laser–Doppler velocimeter of high spatial and temporal resolution has been used to measure the decreasing thickness of slowly flowing liquid and the velocity profiles at the exit of the slit and in the transition region of the plate. The hydrodynamic entrance length can be calculated from an empirical dimensionless relation that includes only the plate inclination angle β as a parameter.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 97 , Issue 2 , 25 March 1980 , pp. 321 - 330
Copyright
© 1980 Cambridge University Press

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Cerro, R. L. & Whitaker, S. 1971 Chem. Engng Sci. 26, 785.
Goren, S. L. 1966 J. Fluid Mech. 25, 87.
Higgins, B. G., Sillimann, W. J., Brown, R. A. & Scriven, L. E. 1977 Ind. & Engng Chem. Fundam. 16, 393.
Iten, P. D. & Mastner, J. 1974 Flow, Its Measurement and Control in Science and Industry, vol.I (ed. R. Wendt), part 2, p. 1007. Pittsburgh.
LeGrand, D. G. & Gaines, G. L. 1969 J. Colloid & Interface Sci. 31, 102.
Ruschak, K. J. & Scriven, L. E. 1977 J. Fluid Mech. 81, 305.
Schowalter, W. R. & Allen, R. C. 1975 Trans. Soc. Rheol. 19, 129.
Stücheli, A. 1976 Dissertation ETH Zürich, no. 5785.
Stücheli, A. 1978 Wärme & Sloffübertragung 11, 91.
Stücheli, A. & Özisik, M. N. 1976 Chem. Engng Sci. 31, 369.
Whitaker, S. & Cerro, R. L. 1974 Chem. Engng Sci. 29, 963.
Wilkes, J. O. & Nedderman, R. M. 1962 Chem. Engng Sci. 17, 177.