RheCluster

RheCluster is a term used in rheology to describe a phenomenon where a material exhibits distinct regions or domains with differing rheological properties. This can manifest as a suspension containing particles that self-assemble into clusters, or a gel-like material where cross-linking creates heterogeneous zones. The rheological behavior of such a material is a complex interplay between the properties of the individual clusters and the surrounding continuous phase, as well as the interactions between the clusters themselves. Understanding RheCluster is crucial for predicting and controlling the flow behavior, mechanical response, and stability of various complex fluids, including paints, food products, biological tissues, and advanced composite materials. Factors influencing the formation and stability of RheCluster include particle concentration, interparticle forces, solvent properties, and processing conditions. Experimental techniques such as rheometry, microscopy, and scattering methods are employed to identify and characterize these clustered structures and their impact on macroscopic rheology. The presence of RheCluster can lead to non-Newtonian behaviors like shear thinning, shear thickening, or yield stress, depending on the specific arrangement and nature of the clusters. Modeling efforts aim to capture the mesoscopic structure and its link to macroscopic rheological responses.