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Published on: February 5, 2022
Adhesion properties of chain-forming ferrofluids
Sérgio A Lira1, José A Miranda
1Departamento de Física, LFTC, Universidade Federal de Pernambuco, Recife, Pernambuco 50670-901, Brazil.
Summary
Highly magnetized ferrofluids form particle chains, altering their flow behavior. Applied magnetic fields control these chain structures, significantly impacting viscosity and adhesion for advanced material applications.
Area of Science:
- Materials Science
- Fluid Dynamics
- Magnetohydrodynamics
Background:
- Ferrofluids exhibit non-Newtonian behavior due to magnetic particle chain formation.
- Understanding these behaviors is crucial for advanced material applications.
Purpose of the Study:
- Investigate rheological and adhesive properties of chain-forming ferrofluids under tensile deformation.
- Analyze the impact of magnetic fields on ferrofluid behavior.
Main Methods:
- Analytical derivation of magnetoviscous contribution and adhesive force.
- Examination of system response to chain length variations under different shear conditions.
Main Results:
- Chain formation significantly influences ferrofluid adhesive strength and viscosity.
- Ferrofluids display both shear-thinning and shear-thickening regimes.
- Applied magnetic fields enable control over rheological responses.
Conclusions:
- Magnetic fields can be used to monitor and tune ferrofluid rheological and adhesive properties.
- Findings allow for more accurate assessment of ferrofluid adhesive characteristics.
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