Numerical studies of rheology: the role of inertia, deformation and short-range interactions

L Brandt

Royal Institute of Technology (KTH), Sweden

Abstract

The recent advancements in the development of efficient numerical algorithms and the increasing computational power of large-scale parallel computers have allowed interface-resolved simulations of particle and droplet suspended in a carrier fluid. These provide information about the system microstructure and how it relates to the global macroscopic behavior, provided information about the short-range interaction forces is available. Here, we will give an overview of recent numerical studies on the rheology of rigid and deformable particles and emulsions with different short-range interactions in shear flows. We will analyse the role of inertia, particle and wall deformability and interparticle forces and show how these affect the bulk rheology in semi-dilute and dense conditions.

In general, elasticity is found to decrease the system effective viscosity whereas inertia increases it.

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