Measurement – Research Group of Multiphase Reactors
Physical properties of gas-liquid and liquid-liquid interface
- Measurement of static surface and interfacial tension using Du Noüy ring, Wilhelmy plate methods (Krüss K11), and pendant drop method (Krüss DSA)
- Measurement of dynamic surface tension as a function of surface age (Krüss BP 100)
- Measurement of contact angle and surface elasticity (Krüss DSA)
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Rheometric experiments of complex multiphase systems
- Measurement of rheological properties of various liquids, kaolin suspensions, slurries, nanofluids, non-Newtonian liquids, and mixtures (Mars III rheometer)
- Measurement of flow anomalies in proximity of the wall – apparent wall slip or stagnant layer formation of kaolin suspensions (Mars III rheometer)
- Measurement of rheological properties of powders using various methods: (i) dynamic methods – stability, flowability, aeration, compaction; (ii) bulk methods – compression, fluid permeability test; (iii) shear methods – shear cell test, wall friction test (FT4 Powder rheometer)
Flow visualization – measurements and evaluation
- High-speed or high-resolution imaging of bubbly and granular flows (Photron FASTCAM Mini AX200, Photron Fastcam SA1.1, Redlake MotionPro X3, Pulnix TM-4200CL, Lenses and other optical accessories)
- Time-resolved Particle Image Velocimetry (Dantec Dynamics)
- Electrodiffusion diagnostic of near-wall flow (method developed in the laboratory)
- Measurement of local bubble characteristics – bubble size, gas holdup, bubble velocity (Optical probe A2Photonics)
- Evaluation software:
- PIVsuite, the computer program for PIV analysis – in-house code
- DynamicStudio PIV and PTV Software
- NIS Elements software
- Bubble tracking – in-house code for bubble tracking, size analysis
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Electrodiffusion diagnostic
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