Abstract
In a newly build counterflow water channel multiphase flows can be investigated with and without emulated background fluctuations. These fluctuations create a model swarm that allows to investigate single bubbles as if they are moving in a bubbleswarm without the visual obscuration of a real swarm. The fluctuations are created with specially designed particle grids that are mounted on-top of the channel and excited by the counterflow. These girds consist of small plastic beads in the size of the to be investigated bubble. Each bead is solely attached to the element in vertical direction, which allows the string of beads to move with the flow, creating a more truthful swarm agitation. Several grids, varying in design and volume fraction were characterized and the grid with a volume fraction of 10% and 5 mm beads showed the best accordance with real bubble swarms. With these grids it is possible to use optical methods like PIV (particle image velocimetry) to measure the flow statistics behind and around a single bubble. With a newly introduced 3D reconstruction the timeresolved shape of the bubble can be measured simultaneously with the flow around it. Investigation of the shape revealed that it is necessary even for small bubbles to apply a full 3D evaluation, for example with the surface-to-volume ratio. With this the shape oscillations can be described and shown the oscillations are hindered by the external fluctuations but not fully suppressed. In addition, it was shown that the movement of the bubble in an emulated swarm is mainly driven by the pressure gradients in the flow.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Deckwer WD (1985) Reaktionstechnik in Blasensäulen. Salle
Kähler CJ, Scharnowski S, Cierpka C (2012) On the resolution limit of digital particle image velocimetry. Exp Fluids 52:1629–1639
Risso F (2011) Theoretical model for k-3 spectra in dispersed multiphase flows. Phys Fluids 23:011701
Riboux G, Legendre D, Risso F (2013) A model of bubble-induced turbulence based on large-scale wake interactions. J Fluid Mech 719:362–387
Mießner U, Kück UD, Haase K, Kähler CJ, Fritsching U, Thoming J (2017) Experimental assessment of an innovative device to mimic bubble swarm turbulence. Chem Eng Technol 40:1466–1474
Haase K, Kück UD, Thoming J, Kähler CJ (2017) Emulation of bubble-induced turbulence using randomly moving particles in a grid structure. Chem Eng Technol 40:1502–1511
Risso F, Ellingsen K (2002) Velocity fluctuations in a homogeneous dilute dispersion of high-Reynoldsnumber rising bubbles. J Fluid Mech 453:395–410
Riboux G, Risso F, Legendre D (2009) Experimental characterization of the agitation generated by bubbles rising at high Reynolds number. J Fluid Mech 643:509
Martinez J, Chehata D, van Gils DPM, Sun C, Lohse D (2009) On bubble clustering and energy spectra in pseudo-turbulence. J Fluid Mech:1–35
Liu TJ, Bankoff SG (1993) Structure of air-water bubbly flow in a vertical pipe-I. Liquid mean velocity and turbulence measurements. Int J Heat Mass Transf 36:1049–1060
Kim M, Lee JH, Park H (2016) Study of bubble-induced turbulence in upward laminar bubbly pipe flows measured with a two-phase particle image velocimetry. Exp Fluids 57:55
Risso F (2016) Physical interpretation of probability density functions of bubble-induced agitation. J Fluid Mech 809:240–263
Lance M, Bataille J (2006) Turbulence in the liquid phase of a uniform bubbly air–water flow. J Fluid Mech 222:95
Takagi S, Matsumoto Y (2011) Surfactant Effects on bubble motion and bubbly flows. Annual Rev Fluid Mech 43:615–636
Lunde K, Perkins RJ (1998) Shape oscillations of rising bubbles. Appl Sci Res 58:387–408
Hosokawa S, Tomiyama A (2013) Bubble-induced pseudo turbulence in laminar pipe flows. Int J Heat Fluid Flow 40:97–105
Abbas M, Climent E, Simonin O, Maxey MR (2006) Dynamics of bidisperse suspensions under Stokes flows: linear shear flow and sedimentation. Phys Fluids:121504
Serizawa A, Kataoka I, Michiyoshi I (1975) Turbulence structure of air-water bubbly flow-II. Local properties. Int J Multiph Flow 2:235–246
Pannek S, Pauli J, Onken U (1994) Determination of local hydrodynamic parameters in bubble columns by the electrodiffusion method with oxygen as depolarizer. J Appl Electrochem 24:666–669
Michiyoshi I, Serizawa A (1986) Turbulence in two-phase bubbly flow. Nucl Eng Des 95:253–267
Elsinga GE, Scarano F, Wieneke B, Van Oudheusden BW (2006) Tomographic particle image velocimetry. Exp Fluids 41:933–947
Brücker C (1999) Structure and dynamics of the wake of bubbles and its relevance for bubble interaction. Phys Fluids 11:1781–1796
De Vries AWG (2001) Path and wake of a rising bubble. Eng Fluid Dyn:106
Fan LS, Tsuchiya K (1990) Bubble wake dynamics in liguids and liquid-solid. Butterworth-Heinemann, Stoneham
Aas BM, Klüfers P (2017) The structural chemistry of stable high-spin nitrosyl–iron(II) compounds with aminecarboxylato co-ligands in aqueous solution. Eur J Inorg Chem 2017:2313–2320
Acknowledgements
This work was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)—priority program SPP1740 “Reactive Bubbly Flows” (237189010) for the project 256600893.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2021 The Author(s), under exclusive license to Springer Nature Switzerland AG
About this chapter
Cite this chapter
Haase, K., Kähler, C.J. (2021). Analysis of Turbulent Mixing Und Mass Transport Processes in Bubble Swarms Under the Influence of Bubble-Induced Turbulence. In: Schlüter, M., Bothe, D., Herres-Pawlis, S., Nieken, U. (eds) Reactive Bubbly Flows. Fluid Mechanics and Its Applications, vol 128. Springer, Cham. https://doi.org/10.1007/978-3-030-72361-3_6
Download citation
DOI: https://doi.org/10.1007/978-3-030-72361-3_6
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-030-72360-6
Online ISBN: 978-3-030-72361-3
eBook Packages: EngineeringEngineering (R0)