Fluid Dynamics Analysis of Channel Flow Geometries for Materials Characterization in Microfludic Devices

Published

September 1, 2005

Author(s)

Frederick R. Phelan Jr., Steven Hudson, Matthew D. Handler

Abstract

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 delineate combinations of geometry and boundary conditions for which the flow type can be adjusted between 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 via changes in boundary conditions, while keeping the geometry constant.

Citation

Rheologica Acta

Volume

45

Issue

No. 1

Pub Type

Journals

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Keywords

finite element simulation, flow classification, four roll mill, microfludics, nano-materials, nano-technology

Citation

Phelan Jr., F. , Hudson, S. and Handler, M. (2005), Fluid Dynamics Analysis of Channel Flow Geometries for Materials Characterization in Microfludic Devices, Rheologica Acta, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=852311 (Accessed October 26, 2025)