Abstract
Different approaches to the implementation of a computational model for electroosmotic flow, solved with the FlexPDE software, are discussed. A transient analysis together with specific boundary conditions set as a time ramp was found quite convenient. The way the equation system is written within the FlexPDE script, leads to different effects for identical lateral boundary conditions. In all cases tested, the fluid velocity profile at the channel center remains unaffected and is comparable to the analytical solution. However, within adjacent regions to the channel lateral borders, a diffusion-artifact appears in some cases leading to distortion of the concentration profile thereat.
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