Electroosmotic mixing of viscoplastic fluids in a microchannel
Sumit Kumar Mehta, Pranab Kumar Mondal
Abstract
This work finds that the yield stress (YS) of electrically actuated viscoplastic fluids significantly influences mixing and aggregation phenomena. When shear force is applied below the YS limit, these fluids exhibit solid-like behavior due to their viscoplasticity. This is commonly observed in biological fluids like blood used in applications where rapid mixing is crucial. The local modulation of electrical forcing is achievable due to the ionic interaction between the solid and liquid phases. This leads to the observation of distinct flow structures, found to be influenced by the YS. Additionally, the likelihood of constituent particles aggregating is strongly correlated with YS.
Topics & Concepts
MicrochannelViscoplasticityMixing (physics)MechanicsMaterials scienceThermodynamicsPhysicsConstitutive equationFinite element methodQuantum mechanicsMicrofluidic and Capillary Electrophoresis ApplicationsMicrofluidic and Bio-sensing TechnologiesNanopore and Nanochannel Transport Studies