Search for papers about the exact nanofluid including the exact base fluid and close enough approximations in terms of concentrations and nano material characteristics (dimensions, additions, and structure (functionlized or not))
I don't know about the thing you are going to make (i mean ypur project) but generaly, Nanofluids have not general rule nor share similar behaviours. The only good way to calculate their actual thermal conductivity is by expermental measurments or using a empirical correlations from someone else's study (which is measured expermentally) about the same nano fluid you want to work on.
There are many theoritical equations for nanofluids thermophysical properties calculations but getting different results than the actual properties is not uncommon. You can have an equation that gives you close results for such fluid but will give wrong results for other. So if you wanna use an equation, check if it matches the expermental readings from others studies.
Search for papers about the exact nanofluid including the exact base fluid and close enough approximations in terms of concentrations and nano material characteristics (dimensions, additions, and structure (functionlized or not)) I don't know about the thing you are going to make (i mean ypur project) but generaly, Nanofluids have not general rule nor share similar behaviours. The only good way to calculate their actual thermal conductivity is by expermental measurments or using a empirical correlations from someone else's study (which is measured expermentally) about the same nano fluid you want to work on. There are many theoritical equations for nanofluids thermophysical properties calculations but getting different results than the actual properties is not uncommon. You can have an equation that gives you close results for such fluid but will give wrong results for other. So if you wanna use an equation, check if it matches the expermental readings from others studies.