Optimising non-Newtonian fluids for impact protection of laminates
arXiv:2311.08280 · doi:10.1073/pnas.2317832121
Abstract
Non-Newtonian fluids can be used for the protection of flexible laminates. Understanding the coupling between the flow of the protecting fluid and the deformation of the protected solids is necessary in order to optimise this functionality. We present a scaling analysis of the problem based on a single coupling variable, the effective width of a squeeze flow between flat rigid plates, and predict that impact protection for laminates is optimised by using shear-thinning, and not shear-thickening, fluids. The prediction is verified experimentally by measuring the velocity and pressure in impact experiments. Our scaling analysis should be generically applicable for non-Newtonian fluid-solid interactions in diverse applications.
arXiv comment7 pages, 5 figures with SI of 2 pages, 3 figures
References in corpus (12)
- Hydrodynamic and contact contributions to shear thickening in colloidal suspensions
- A rheological signature of frictional interactions in shear thickening suspensions
- Shear thickening and jamming of dense suspensions: the "roll" of friction
- High-speed ultrasound imaging in dense suspensions reveals impact-activated solidification due to dynamic shear jamming
- A constraint-based approach to granular dispersion rheology
- Conching chocolate: A prototypical transition from frictionally jammed solid to flowable suspension with maximal solid content
- Rheology of dense granular suspensions under extensional flow
- Non-Newtonian fluid--structure interactions: Static response of a microchannel due to internal flow of a power-law fluid
- Turning a yield-stress calcite suspension into a shear-thickening one by tuning inter-particle friction
- Competing Time Scales Lead to Oscillations in Shear-Thickening Suspensions
- A new pressure sensor array for local normal stress measurement in complex fluids
- Optimising non-Newtonian fluids for impact protection of laminates