Fluid dynamics analysis of channel flow geometries for materials characterization in microfluidic devices

The fluid dynamics of geometries for liquid state materials characterization in microfluidic devices are investigated. Numerical simulation together with flow classification criteria are used to explore combinations of geometry and boundary conditions for which the flow type can be adjusted between...

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Bibliographic Details
Published in:Rheologica acta 2005-09, Vol.45 (1), p.59-71
Main Authors: PHELAN, Frederick R, HUDSON, Steven D, HANDLER, Matthew D
Format: Article
Language:English
Subjects:
Applied fluid mechanics
Boundary conditions
Channel flow
Computational fluid dynamics
Computer simulation
Exact sciences and technology
Fluid dynamics
Fluidics
Fundamental areas of phenomenology (including applications)
Geometry
Microfluidic devices
Physics
Simulation
Stagnation point
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Summary:The fluid dynamics of geometries for liquid state materials characterization in microfluidic devices are investigated. Numerical simulation together with flow classification criteria are used to explore combinations of geometry and boundary conditions for which the flow type can be adjusted between simple shear and extension, while providing adequate flow strength and a stable environment for material observation. Two classes of flow geometries are identified. Both make use of opposing, laterally offset fluid streams that produce a stagnation point in the center of the geometry. In the first class, the flow type is manipulated by changing parameters inherent to the base geometry. This first case serves as a basis for identifying a second class in which the flow type is manipulated by changing the pressure boundary conditions, while keeping the geometry constant.
ISSN:0035-4511
1435-1528
DOI:10.1007/s00397-005-0449-0