Does anybody have experience (or references) on measurements of viscosity of nanofluids (solute size less than 100 nm) with different methods - are results significantly different using different techniques?
Please see the following paper:
https://www.researchgate.net/publication/319445996_Enhancement_Heat_Transfer_of_Cu-Water_Nanofluids_with_Thermophysical_Properties_Modeling_by_Artificial_Neural_Network
Good Luck
Article Enhancement Heat Transfer of Cu-Water Nanofluids with Thermo...
When u say different methods..do u mean using different instruments? As long as u r using a rheometer, it shouldn't differ but also depends on the particle loading and range of shear rate u are working on. The sensitivity of the instrument and the technique or sampling and shear rate range becomes very important when u r dealing with water based nanofluids which are the most difficult nanofluids especially at lower particle loading. Otherwise higher viscosity nanofluids are expected to give reproducible results as long as u r working in a shear rate of between 10-1000 s-1. But away from this ranges, u might need to consider the sensitivity of the instrument in the lower range and turbulence effect in the upper range.
It should not different because viscosity is a property of nanofluid. Different methods must give identical response.
I'm asking this question because nanofluids show significant deviation from the classical Einstein behavior, even for very small solute volume fractions. This may indicate that such fluids are not homogenous at microscale. This may influence viscosity measurements, if such measurements affect nanofluids at microscale.
Please see the following paper:
https://www.researchgate.net/publication/319445996_Enhancement_Heat_Transfer_of_Cu-Water_Nanofluids_with_Thermophysical_Properties_Modeling_by_Artificial_Neural_Network
Good Luck
Article Enhancement Heat Transfer of Cu-Water Nanofluids with Thermo...
Dear Colleague, thanks for the link to your review paper. I should point out that we have recently proven that there are no anomalous effects in water-based nanofluids, see Article Correct interpretation of nanofluid convective heat transfer
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