As Maxwell relation is well-known to determine the thermal conductivity of mixing nanoparticles with oil. However, I need a relation to calculate the thermal conductivity of mixed two liquids.
Hi Muhammad, you can find few formulas to estimate thermal conductivity of binary liquid mixtures in Chapter 10-12 of "The Properties of Gases and Liquids" by Reid, Prausnitz and Sherwood (p.531 in Third edition) - if you know thermal conductivities of the components. But much more reliable way would be to measure the mixture's thermal conductivity directly.