A Microfluidic Prototype for High-Frequency, Large Strain Oscillatory Flow Rheometry
We introduce a “Rheo-chip” prototypical rheometer which is able to characterise model fluids under oscillatory flow at frequencies <i>f</i> up to 80 Hz and nominal strain up to 350, with sample consumption of less than 1 mL, and with minimum inertial effects. Experiments carried out with...
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| Language: | English |
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MDPI AG
2022-02-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/13/2/256 |
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| author | Alfredo Lanzaro Xue-Feng Yuan |
| author_facet | Alfredo Lanzaro Xue-Feng Yuan |
| author_sort | Alfredo Lanzaro |
| collection | DOAJ |
| description | We introduce a “Rheo-chip” prototypical rheometer which is able to characterise model fluids under oscillatory flow at frequencies <i>f</i> up to 80 Hz and nominal strain up to 350, with sample consumption of less than 1 mL, and with minimum inertial effects. Experiments carried out with deionized (DI) water demonstrate that the amplitude of the measured pressure drop <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>Δ</mo><msub><mi>P</mi><mi>M</mi></msub></mrow></semantics></math></inline-formula> falls below the Newtonian prediction at <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>f</mi><mo>≥</mo></mrow></semantics></math></inline-formula> 3 Hz. By introducing a simple model which assumes a linear dependence between the back force and the dead volume within the fluid chambers, the frequency response of both <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>Δ</mo><msub><mi>P</mi><mi>M</mi></msub></mrow></semantics></math></inline-formula> and of the phase delay could be modeled more efficiently. Such effects need to be taken into account when using this type of technology for characterising the frequency response of non-Newtonian fluids. |
| first_indexed | 2024-03-09T21:24:27Z |
| format | Article |
| id | doaj.art-36ff26aa707441598c1ad2d9d622f5aa |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-09T21:24:27Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
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| series | Micromachines |
| spelling | doaj.art-36ff26aa707441598c1ad2d9d622f5aa2023-11-23T21:11:05ZengMDPI AGMicromachines2072-666X2022-02-0113225610.3390/mi13020256A Microfluidic Prototype for High-Frequency, Large Strain Oscillatory Flow RheometryAlfredo Lanzaro0Xue-Feng Yuan1Institute for Systems Rheology, Guangzhou University, No. 230 West Outer Ring Road, Higher Education Mega-Center, Panyu District, Guangzhou 510006, ChinaInstitute for Systems Rheology, Guangzhou University, No. 230 West Outer Ring Road, Higher Education Mega-Center, Panyu District, Guangzhou 510006, ChinaWe introduce a “Rheo-chip” prototypical rheometer which is able to characterise model fluids under oscillatory flow at frequencies <i>f</i> up to 80 Hz and nominal strain up to 350, with sample consumption of less than 1 mL, and with minimum inertial effects. Experiments carried out with deionized (DI) water demonstrate that the amplitude of the measured pressure drop <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>Δ</mo><msub><mi>P</mi><mi>M</mi></msub></mrow></semantics></math></inline-formula> falls below the Newtonian prediction at <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>f</mi><mo>≥</mo></mrow></semantics></math></inline-formula> 3 Hz. By introducing a simple model which assumes a linear dependence between the back force and the dead volume within the fluid chambers, the frequency response of both <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>Δ</mo><msub><mi>P</mi><mi>M</mi></msub></mrow></semantics></math></inline-formula> and of the phase delay could be modeled more efficiently. Such effects need to be taken into account when using this type of technology for characterising the frequency response of non-Newtonian fluids.https://www.mdpi.com/2072-666X/13/2/256microfluidic rheometryhigh frequency characterisationLAOS |
| spellingShingle | Alfredo Lanzaro Xue-Feng Yuan A Microfluidic Prototype for High-Frequency, Large Strain Oscillatory Flow Rheometry Micromachines microfluidic rheometry high frequency characterisation LAOS |
| title | A Microfluidic Prototype for High-Frequency, Large Strain Oscillatory Flow Rheometry |
| title_full | A Microfluidic Prototype for High-Frequency, Large Strain Oscillatory Flow Rheometry |
| title_fullStr | A Microfluidic Prototype for High-Frequency, Large Strain Oscillatory Flow Rheometry |
| title_full_unstemmed | A Microfluidic Prototype for High-Frequency, Large Strain Oscillatory Flow Rheometry |
| title_short | A Microfluidic Prototype for High-Frequency, Large Strain Oscillatory Flow Rheometry |
| title_sort | microfluidic prototype for high frequency large strain oscillatory flow rheometry |
| topic | microfluidic rheometry high frequency characterisation LAOS |
| url | https://www.mdpi.com/2072-666X/13/2/256 |
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