dorsal/arxiv
View SchemaMeasurements of the bulk and interfacial velocity profiles in oscillating Newtonian and Maxwellian fluids
| Authors | M. Torralba, J. R. Castrejon-Pita, A. A. Castrejon-Pita, G. Huelsz, J. A. del Rio, J. Ortin |
|---|---|
| Categories | |
| ArXiv ID | physics/0505073 |
| URL | https://arxiv.org/abs/physics/0505073 |
| DOI | 10.1103/PhysRevE.72.016308 |
| Journal | Physical Review E 72, 016308 (2005). |
Abstract
We present the dynamic velocity profiles of a Newtonian fluid (glycerol) and a viscoelastic Maxwell fluid (CPyCl/NaSal in water) driven by an oscillating pressure gradient in a vertical cylindrical pipe. The frequency range explored has been chosen to include the first three resonance peaks of the dynamic permeability of the viscoelastic fluid / pipe system. Three different optical measurement techniques have been employed. Laser Doppler Anemometry has been used to measure the magnitude of the velocity at the centre of the liquid column. Particle Image Velocimetry and Optical Deflectometry are used to determine the velocity profiles at the bulk of the liquid column and at the liquid--air interface respectively. The velocity measurements in the bulk are in good agreement with the theoretical predictions of a linear theory. The results, however, show dramatic differences in the dynamic behaviour of Newtonian and viscoelastic fluids, and demonstrate the importance of resonance phenomena in viscoelastic fluid flows, biofluids in particular, in confined geometries.
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"abstract": "We present the dynamic velocity profiles of a Newtonian fluid (glycerol) and\na viscoelastic Maxwell fluid (CPyCl/NaSal in water) driven by an oscillating\npressure gradient in a vertical cylindrical pipe. The frequency range explored\nhas been chosen to include the first three resonance peaks of the dynamic\npermeability of the viscoelastic fluid / pipe system. Three different optical\nmeasurement techniques have been employed. Laser Doppler Anemometry has been\nused to measure the magnitude of the velocity at the centre of the liquid\ncolumn. Particle Image Velocimetry and Optical Deflectometry are used to\ndetermine the velocity profiles at the bulk of the liquid column and at the\nliquid--air interface respectively. The velocity measurements in the bulk are\nin good agreement with the theoretical predictions of a linear theory. The\nresults, however, show dramatic differences in the dynamic behaviour of\nNewtonian and viscoelastic fluids, and demonstrate the importance of resonance\nphenomena in viscoelastic fluid flows, biofluids in particular, in confined\ngeometries.",
"arxiv_id": "physics/0505073",
"authors": [
"M. Torralba",
"J. R. Castrejon-Pita",
"A. A. Castrejon-Pita",
"G. Huelsz",
"J. A. del Rio",
"J. Ortin"
],
"categories": [
"physics.flu-dyn",
"physics.gen-ph"
],
"doi": "10.1103/PhysRevE.72.016308",
"journal_ref": "Physical Review E 72, 016308 (2005).",
"title": "Measurements of the bulk and interfacial velocity profiles in oscillating Newtonian and Maxwellian fluids",
"url": "https://arxiv.org/abs/physics/0505073"
},
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