Berlin 2012 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 35: Focus: Rheology I (joint focus with DRG)

CPP 35.13: Vortrag

Donnerstag, 29. März 2012, 18:30–18:45, C 243

Rheology of human blood plasma: Viscoelastic versus Newtonian behaviour — •Matthias Brust¹, Christof Schaefer¹, Roland Doerr¹, Paulo Arratia², and Christian Wagner¹ — ¹Experimentalphysik, Universität des Saarlandes, Saarbrücken, Germany — ²Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania, Philadelphia, USA

We investigated the rheological characteristics of human blood plasma using three different flow experiments, namely the capillary break-up extensional rheometer (CaBER), a commercial rotational shear rheometer, and the shear flow in a contraction microfluidics. While the shear experiments showed a Newtonian behaviour, we found a visco-elastic behaviour of blood plasma in the pure extensional experiment. Comparing the results with those of a low concentrated polymeric fluid (PEO) with matchable rheometric characteristics in terms of elongational relaxation time and shear viscosity showed a consistent picture in all experiments. The results are discussed with regard to their relevance concerning venous blood flow in the human body.