AI Article Synopsis
- New models using the differential effective medium approach (DEMA) have been created to understand the viscosity of concentrated suspensions of elastic particles, particularly human red blood cells (RBCs).
- These models predict shear-thinning behavior as the shear rate increases, showing a decrease in relative viscosity similar to observations in actual RBC suspensions.
- Findings suggest that lower particle rigidity or higher viscosity of the continuous medium enhances shear-thinning, aligning with experimental data from normal and hardened RBCs in saline.
Article Abstract
New models for the viscosity of concentrated suspensions of deformable elastic particles are developed using the differential effective medium approach (DEMA). The models are capable of describing the rheological behavior of un-aggregated suspensions of human red blood cells (RBCs). With the increase in shear rate, a shear-thinning behavior is predicted similar to that observed in the case of un-aggregated suspensions of RBCs. A decrease in relative viscosity and an enhancement of shear-thinning behavior is predicted when either the particle rigidity (elastic modulus) is decreased or the continuous medium viscosity is increased. These predictions are similar to those observed in suspensions of human RBCs. The proposed models are evaluated using experimental data on normal and hardened human RBC suspensions in protein-free saline.
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| http://dx.doi.org/10.1016/s0021-9290(03)00067-8 | DOI Listing |
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