Forced convection with unsteady pulsating flow of a hybrid nanofluid in a microchannel in the presence of EDL, magnetic and thermal radiation effects

An unsteady force convection flow of a hybrid nanofluid flow driven in a microchannel by an applied time-dependent periodic pressure gradient in the presence of electric double layer, magnetic field, and thermal radiation effects is studied. Few attentions have been paid to investigate such pressure driven flow in micro-scale though they could be very important in practical applications. In our configuration, the Boltzmenn Poisson's equation is employed to describe the electrostatic potential, while the reduced Navier-stokes equations based on small pressure amplitude assumption are applied to depict the conservations of momentum and thermal energy. Analytical solutions for all fields are obtained. The influences of physical parameters such as the Debye-Hiickel parameter, the Hartmann number, the angular velocity, and the thermal radiation parameter on both steady and unsteady components of the velocity and temperature profiles are presented and discussed. Results show that hybrid nanofluids hold almost the same behaviours as conventional nanofluids. Therefore it is expected to replace conventional nanofluids by hybrid nanofluids for design of cheaper and higher performance heat exchangers or cooling systems and so on.