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- Title
NUMERICAL STUDY OF DROP SPREADING OVER SATURATED PORES.
- Authors
Lunkad, Siddhartha F.; Maiti, R. N.; Buwa, Vivek V.; Nigam, K. D. P.
- Abstract
Numerical study of the dual effect of pores in liquid spreading over porous surface (flat and spherical) whereby liquid movement is facilitated as well as restricted (visualised by Khanna and Nigam [Khanna and Nigam, Chem. Eng. Sci. 57, 3401-3405 (2002)]) is presented to improve the present understanding of wetting. Using the volume of fluid (VOF) method in a two-dimensional solution domain, the influence of various parameters viz. drop volume, pore density, surface wettability and liquid properties on the liquid spreading over 2D pellets with saturated pores was numerically investigated. Simulation results were found to capture the key features of the liquid spreading over non-porous and porous surfaces qualitatively. The variation of spread factor and the apex height of liquid film with time were in a good qualitative agreement with the concept of dual action of pores. The liquid spreading was observed to have a direct proportionality with the pore density, that is, higher the number of pores, better was the liquid spreading. It was also observed that the influence of the pores on the liquid spreading was reduced with decrease in the surface wettability. It is expected that this numerical analysis of the liquid droplet spreading over saturated porous surface will be useful for better understanding of the physics of drop and pore (saturated) interactions.
- Subjects
LIQUIDS; POROUS materials; WETTING; COMPUTER simulation; CHEMICAL engineering
- Publication
Canadian Journal of Chemical Engineering, 2010, Vol 88, Issue 4, p661
- ISSN
0008-4034
- Publication type
Article
- DOI
10.1002/cjce.20356