Abstract:
Non-equilibrium molecular dynamics (NEMD) simulations are performed to investigate the viscosity and rheology of benzene and nanofluids containing carbon nanotubes of two diameters and varying lengths. The results demonstrate that these fluids exhibit pseudoplastic (shear-thinning) behavior with increasing shear rate. Correlations are established for the critical shear rates as a function of nanotube concentration and length. At high shear rates, the viscosity differences between the nanofluids and the base fluid decrease monotonically, irrespective of nanotube length. This is attributed to shear-induced changes in the momentum dissipation mechanisms within the system.
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