1.13EFFECT OF BROWNIAN MOTION
         Because of the size of nanoparticles the Brownian motion of nanoparticles will be another potential factor in calculating the thermal conductivity of nanofluids.
         To develop such a theory for the thermal conductivity of nanofluids they assumed that energy transport in nanofluids involving four modes:
        Collision between base fluid molecules.
        Thermal diffusion in nanoparticles.
        Collision between nanoparticles.

Thermal interaction of dynamic or dancing nanoparticles with base fluid molecules.
                                      Figure.(5)       BROWNIAN MOTION

                          Figure.(6)       BROWNIAN MOTION

                                 Figure.7 (Nano fluid motivation)