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Bulgarian Journal of Physics
Print: 1310-0157 Online: 1314-2666
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RECOGNIZED BY THE EUROPEAN PHYSICAL SOCIETY 
Bulg. J. Phys. vol.46 no.3 (2019), pp. 229-234
The Impact of Filtration on Water Modeled by Contact Angle Evaporation (CAE) Distribution
S. Todorov1, L. Popova2
1Institute of Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd., 1784 Sofia, Bulgaria
2Georgi Nadjakov Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd., 1784 Sofia, Bulgaria
go back1Institute of Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd., 1784 Sofia, Bulgaria
2Georgi Nadjakov Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd., 1784 Sofia, Bulgaria
Abstract. Filtration of water samples with two different transport velocities across a porous medium is examined and change of water properties due to filtration is observed with subsequent conservation of this change in time. As a method to manifest these effects, we use a comparison of the two distributions of wetting angles obtained during the evaporation of sample sessile drops taken before and after the filtration. As a porous medium a folio with small holes of 0.15 micrometer size was used. A clear difference between these two distributions is observed and this difference is conserved 24 and 48 hours after the water filtration.