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Model ID: 603

Transport in an Electrokinetic Valve

This model presents an example of pressure driven flow and electrophoresis in a 3D micro channel system.

The model presents a study of a pinched injection cross valve during the focusing, injection, and separation stages.

Focusing is obtained through pressure driven flow of the sample and buffer solution, which confines the sample in the focusing channel. This is done through coupling the flow, to electric field and the electrokinetic flow application mode.

When steady state has been obtained, the pressure driven flow is turned off and an electric field is applied along the channels. The electric field drives the dissociated sample ions that are found in the focusing zone at right angles to the focusing channel, through the injection channel. This is solved in the time-domain.

A clean separation of the sample ions is important and is investigated.

This view shows the time-dependent transfer of ions during this injection stage. A clean separation of the sample ions is important, and different configurations of the electric field are tested to achieve this.

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