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Kinetics of spreading wetting of blood over porous substrates
journal contributionposted on 22.05.2018 by Anna Trybala, Victor Starov
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Blood rheology and spreading of blood over porous substrates in the case of complete and partial wetting are reviewed. It is shown that the blood is well described by a model of non-Newtonian shear thinning power law liquid. In the case of complete wetting a theory is developed, which predicts a universal behaviour of radius of blood droplet, contact angle and wetted spot on time. The predicted theoretical behaviour is a good agreement with experimental observation. In the case of particle wetting the experimental data show also a universal behaviour in the case of sufficiently big pore sizes but a new phenomenon was found in the case then red blood cells are bigger than the pore sizes: they accumulate on the membrane surface, which allow serration of plasma and red blood cells without damaging red blood cells.
This research was supported by Marie Curie project CoWet; MAP EVAPORATION project, European Space Agency; COST MP1106 EU project.
- Aeronautical, Automotive, Chemical and Materials Engineering
- Chemical Engineering