Rheology Lab Information

Country
Finland
University
VTT Technical Research Centre of Finland
Institution
Soft Matter team, Sustainable Products and Materials research area, Jyväskylä
Rheometers
  • TA Instruments DHR-2 rheometer
  • Brookfield viscometers
  • Custom-built pipe rheometers
  • Flow imaging and velocity profiling combined with rotational and pipe rheometry
Accessories
  • Wide selection of measurement geometries: parallel plates, cone-and-plate and concentric cylinder geometries with various surface finishes (smooth, sandblasted, crosshatched, serrated). Vane-in-cup geometries are available for the rheological characterization of samples exhibiting wall slip, large particles and/or sensitive microstructure
  • Rheo-optics: transparent measurement geometries for simultaneous rheological characterization and imaging of sample's microstructure with optical coherence tomography (OCT) and digital microscopy
  • Peltier temperature control: parallel plates & cone-and-plate: -40 to 200 °C, concentric cylinder & vane-in-cup: -20 to 150 °C, rheo-optics: -20 to 100 °C
  • 3D-printed measurement geometries: possibility to design and manufacture customized measurement geometries using different 3D printing techniques
  • Modular, customizable pipe rheometers: pressure loss and viscosity measurements on liquids, suspensions and foams in various pipe flow geometries
  • Flow imaging and velocity profiling: analysis of sample microstructure, velocity profile and wall slip in rotational and pipe rheometer measurements using optical coherence tomography (OCT), ultrasound velocity profiling (UVP) and high-speed video imaging (HSVI)
Information Links
Flow imaging with optical coherence tomography: Koponen, A. I., & Haavisto, S. (2020) Analysis of industry-related flows by optical coherence Tomography—A review. KONA Powder and Particle Journal, 37, 42-63, https://doi.org/10.14356/kona.2020003
Flow imaging with polarization-sensitive optical coherence tomography: Jäsberg, A., Puisto, A., Leppänen, I., Koponen, A. I., & Alava, M. J. (2023) Online detection of orientation of cellulose nanocrystals in a capillary flow with polarization-sensitive optical coherence tomography. Cellulose, 30(6), 3539-3550, https://doi.org/10.1007/s10570-023-05072-4
Velocity profiling rheometry: Kataja, M., Lehto, R., Haavisto, S., Salmela, J., & Koponen, A. (2017) Characterization of micro-fibrillated cellulose fiber suspension flow using multi scale velocity profile measurements. Nordic Pulp & Paper Research Journal, 32(3), 473-482, https://doi.org/10.3183/npprj-2017-32-03-p473-482
Modelling of viscosity and wall slip in multiphase flows: Koponen, A. I., Viitala, J., Tanaka, A., Prakash, B., Laukkanen, O. V., & Jäsberg, A. (2024) Pipe rheology of wet aqueous application foams. Chemical Engineering Science, 283, 119282, https://doi.org/10.1016/j.ces.2023.119282
Contacts
Olli-Ville Laukkanen (Olli-Ville.Laukkanen@vtt.fi)
Last Updated By
Olli-Ville.Laukkanen@vtt.fi
Last Updated
8/24/2024 2:37:01 PM

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  HIGHLIGHTS
Webinar Series by Netzsch: Yield Stress Unlocked - Exploring the Science and Applications of Complex Fluids
Netzsch is offering a webinar series on yield stress fluids.

Yield stress fluids are common in daily life and industry. Examples are many: toothpaste, mud, lava, cement, foams, mayonnaise, hair gel, chocolate, and more. Their archetypal feature is a dual response to applied stress: below a critical threshold (the yield stress) they behave like solids, while above it they flow like liquids. The flow characteristics of such materials are difficult to predict, as solid-like and liquid-like regions are generally not known a priori. These complexities, together with their wide range of applications, have been fascinating researchers across mathematics, chemical engineering, and fluid mechanics.

In this six-part webinar series, we explore the complex rheology of yield stress fluids and how it governs flow, stability, and performance across diverse processes and applications. The series brings together leading researchers from around the world—UBC (Canada), Cal Poly (USA), Strathclyde (UK), TU Delft (Netherlands), and ULaval (Canada)—to share practical methods and case studies spanning oil well cementing, gas emission from ponds, bioprinting, sustainability-driven materials, particle manipulation, and multiphase flows of yield stress fluids.

More information can be found here.
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