Investigation of Three Immiscible Fluids in a Microchannel Accounting for the Pressure Gradient and the Electroosmotic Flow Topics: Computer Simulation Techniques; Fluid Dynamics; Hydraulic and Pneumatic Systems; Industrial Processes; Mathematical Simulation; Performance Analysis In Proceedings of the 7th International Conference on Simulation and Modeling Methodologies, Technologies and Applications SIMULTECH - Volume 1, 428-433, 2017 , Madrid, Spain