Biomedical Engineering Reference
In-Depth Information
11.4 Thermal conductivity of nanofluids for different sized particles as
a function of concentration (a) and as a function of particle size (b).
11.3.3 Effect of particle size
For analyzing the effect of particle size on the thermal conductivity ratio of
nanofluids, mainly only spherically shaped particles have been reported. The
thermal conductivity ratio as a function of volume concentration for
different particle sizes is shown in Fig. 11.4(a). It can be easily seen from the
figure that for the same type of particle and base fluid medium, the thermal
conductivity ratio for a smaller sized particle is much higher than that for a
larger sized particle. This observation is valid for all types of particles and
base fluid mediums. This is more clearly demonstrated in Fig. 11.4(b), which
graphically represents the thermal conductivity ratio as a function of particle
