Time-Dependent Liquid Flow and Thermal Characteristics in a
Trapezoidal Microchannel  G. Dituba Ngoma (Canada), A. Sadiki
(Germany), and F. Erchiqui (Canada)   Microfluidics, Heat
transfer, Electroosmosis, Modeling and Simulation.   The
transient effects on the laminar liquid flow and the thermal
characteristics in a three-dimensional microchannel of
trapezoidal cross-section were numerically investigated using
the computational fluid dynamics (CFD) code COMSOL Multiphysics.
The imposed heat flux on the microchannel wall, the Joule
heating due to the applied electric potential at the
microchannel inlet and outlet, and the electroosmosis were taken
into account. Using the Helmholtz Smoluchowski electroosmotic
velocity as boundary condition, the time-dependent liquid
velocity distribution and the temperature field respectively
were found solving the Navier-Stokes equations and the energy
equations. The numerical results obtained demonstrate the impact
of the electric potential and the pressure difference on the