Projects

  • Control
  • Fabrication
  • Simulation

The overall performance of the Digital Microfluidic Systems and hence the quality of the result of an analysis greatly depend on the accuracy of the basic fluidic operations. Therefore, a control system based on the feedback of the status of a commanded operation on a droplet is essential. The feedback will give information such as the position of the droplet, how much it has moved and the speed it is moving in a given direction. There are various ways of detecting and manipulating the position of the droplet, and the Okanagan Digital Microfluidic Laboratory is developing methods of control and feedback that could have applications in the biomedical field.

Okanagan Digital Microfluidic Laboratory develops integrated devices for lab-on-a-chip systems. The digital architectures merge micron-scale electrical circuitry with applications requiring dynamic fluid control. Electrical actuation signals from patterned electrodes are used to direct/actuate fluid flow within the chips. Such implementations offer incredible practical advantages as the structures are reconfigurable and allow for high throughputs.

 

Knowledge of the dynamics for these systems will be particularly useful for robust controller design and device optimization at acceptable power dissipation levels. Ultimately, the physical and geometrical properties of digital microfluidic systems must be accurately modeled to understand the operation of current microfluidic devices and test the feasibility of future digital microfluidic designs.
In Okanagan Digital Microfluidic Laboratory, the research of interest involves the development of a new and highly accurate numerical model for microdroplet motion in digital microfluidic systems. Key objectives identified in accomplishing this goal are as follows:

* Development of an accurate representation for electrostatic effects in microdroplets,

* Development of an accurate representation for hydrodynamic effects in microdroplets,

* Coupling of electrostatic and hydrodynamic effects with interfacial properties and surface morphologies, and

* Complete multi-physics integration of electrohydrodynamic effects for modeling of microdroplet motion.