Abstract
A model based on the response of a micro-rheometer which permits the measurement of the linear viscoelastic properties of small volumes of a fluid is described. The configuration involves a liquid being contained within a capillary bridge between two flat smooth parallel platens that are actuated sinusoidally using a compliant MEMS device. Approximate closed-form equations are derived to analyse the data taking account of both the capillary forces and those arising from viscoelastic flow. The approximate theory is compared to a full numerical simulation of the response of the MEMS rheometer and the validity is discussed. (c) 2007 Elsevier B.V. All rights reserved.
Original language | English |
---|---|
Pages (from-to) | 701-706 |
Number of pages | 6 |
Journal | Sensors and Actuators B: Chemical |
Volume | 130 |
Issue number | 2 |
DOIs | |
Publication status | Published - 28 Mar 2008 |
Keywords
- squeeze flow
- MEMS
- viscoelastic properties
- capillary bridges
- complex fluid