Flow of simple liquids down narrow {ital ssV} grooves
- Case Western Reserve University, Cleveland, Ohio 44106 (United States)
The dynamics of spreading of simple liquids down straight, narrow {ital ssV} grooves open at the top were captured by real-time video imaging. Groove depths in polished copper ranged between 40 and 100 {mu}m and extended approximately 2 cm with {ital ssV} angles of 30{degree}, 60{degree}, and 90{degree}. The surface tension to viscosity ratios ranged from 46 to 970 cm/sec and the capillary number was small, Ca{much_lt}1 in all cases. The length of the spreading liquid scaled with {radical}{ital t} accurately for every case examined; the dynamics were well represented by two numbers, the location of the front in reduced coordinates and a diffusion coefficient. A simple theory is presented for the dynamics of the advancing front that requires no adjustable parameters and fits well the experimental data collected with six alcohols. Unlike drop spreading, the {ital ad} {ital hoc} slip boundary condition of that theory is not invoked for the open groove problem; only the static advancing contact angle is used.
- Research Organization:
- Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 240468
- Journal Information:
- Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, Vol. 52, Issue 4; Other Information: PBD: Oct 1995
- Country of Publication:
- United States
- Language:
- English
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