Concentration Dynamics of Nanoparticles under a Periodic Light Field

Dynamics of Switching Waves in a Nanofluid in a Light Field

“…In our approach, the effect of radiation due to the action of gradient forces on the side of the light field, being an additional source of convection, leads to a completely different spatial distribution of concentration. We note that the amplitudes of the modulated waves in solution (12) Solution (15) shows that in our case the convection of a nanofluid has two processes:…”

“…PhIO-2018 wide-gap semiconductors or dielectrics are used as a dispersive component, are very effective for the realization of a number of nonlinear optical effects [13]. In these media, unlike homogeneous media, the nonlinear optical response arises from the change in the refractive index induced by the light wave and the absorption coefficient due to the phenomena of thermal diffusion and electrostriction of particles [14][15][16][17][18]. At the same time, in our opinion, physical mechanisms connected in particular with the processes of heat and mass transfer in such media require additional investigation.…”

“…The constant B in formula (15) can be determined from the condition of constancy of the average concentration.…”

Appearance of a Solitary Wave Particle Concentration in Nanofluids under a Light Field

“…The main mechanisms for optical nonlinearity in these cases are the phenomena of thermal diffusion and electrostriction of nanoparticles [ 19 , 20 ]. Despite the many studies on this problem [ 21 , 22 , 23 , 24 , 25 ], several questions still remain. In particular, the dynamics of the concentration of nanofluid particles are unknown in the presence of concentration dependences on the coefficients of the thermal conductivity, viscosity, and absorption of radiation of the medium.…”