Particle-Resolving Simulations of Cohesive Sediment Dynamics
Principal Investigator: Dr.-Ing. Bernhard Vowinckel
Duration: 6 years, since March 2020
funded by the German Research Foundation (DFG)
Funding volume: 1.660.000 Euro
The group PRO-MUD at the Leichtweiß-Institute for Hydraulic Engineering at the Technical University of Braunschweig carries out particle-resolved simulations of the transport of sediment in surface waters and coastal areas. The prevailing sediments in these areas are fine-grained and cohesive and are commonly referred to as clay and silt. The dynamics of cohesive sediment are determined by the interplay of gravitational, electrostatic and hydrodynamic forces, which substantially changes hydrodynamic processes compared to non-cohesive sediments (e.g. sand and gravel). The focus of this project will be on flocculation due to van der Waals forces, settling behavior, and erosion in open channels. This creates a better understanding of predicting the dispersal of nutrients and pollutants that bind to these sediments. The knowledge gained is relevant for the research of aquatic ecosystems, the modeling of the global carbon cycle, the binding of CO2 by fine-grained sediment and the exploration of hydrocarbon fields.
E. Krahl, B. Vowinckel, L. Ye, T.-J. Hsu & A.J. Manning (2022) Impact of the Salt Concentration and Biophysical Cohesion on the Settling Behavior of Bentonites. Frontiers Earth Science, 10:886006. doi: 10.3389/feart.2022.886006
Y. Yao, E. Biegert, B. Vowinckel, T. Köllner, E. Meiburg, S. Balachandar, C. S. Criddle & O.B. Fringer (2022). Particle‐resolved simulations of four‐way coupled, polydispersed, particle‐laden flows. International Journal for Numerical Methods in Fluids. 2022; 1-31. doi: 10.1002/fld.5128
R. Zhu, Z. He, K. Zhao, B. Vowinckel, & E. Meiburg (2022). Grain-resolving simulations of submerged cohesive granular collapse. Journal of Fluid Mechanics, 942, A49. doi:10.1017/jfm.2022.404
B. Vowinckel, K. Zhao, L. Ye, A.J. Manning, T. Hsu, E. Meiburg, B. Bai (2022). Physics of Cohesive Sediment Flocculation and Transport: State-of-the-Art Experimental and Numerical Techniques. In (Ed.), Sediment Transport - Recent Advances [Working Title]. IntechOpen. doi.org/10.5772/intechopen.104094
C. Rettinger, S. Eibl, U. Rüde, B. Vowinckel (2022). Rheology of mobile sediment beds in laminar shear flow: Effects of creep and polydispersity. Journal of Fluid Mechanics, 932, A1 (PDF available).
B. Vowinckel, E. Biegert, E. Meiburg, P. Aussillous, É. Guazzelli. Rheology of mobile sediment beds sheared by viscous, pressure-driven flows. Journal of Fluid Mechanics, 921, A20, 2021 (PDF available).
K. Zhao, F. Pomes, B. Vowinckel, T.-J. Hsu, B. Bai, E. Meiburg. Flocculation of suspended cohesive particles in homogeneous isotropic turbulence. Journal of Fluid Mechanics, 921, A17, 2021 (PDF available).
Vowinckel, B. Incorporating grain-scale processes in macroscopic sediment transport models. Acta Mech (2021). https://doi.org/10.1007/s00707-021-02951-4
Zhao, K., Vowinckel, B., Hsu, T. J., Köllner, T., Bai, B., & Meiburg, E. (2020). An efficient cellular flow model for cohesive particle flocculation in turbulence. Journal of Fluid Mechanics, 889, R3 (PDF available).
Vowinckel, B., Biegert, E., Luzzatto-Fegiz, P., & Meiburg, E. (2019). Consolidation of freshly deposited cohesive and noncohesive sediment: Particle-resolved simulations. Physical Review Fluids, 4(7), 074305 (PDF available).
Vowinckel, B., Withers, J., Luzzatto-Fegiz, P., & Meiburg, E. (2019). Settling of cohesive sediment: particle-resolved simulations. Journal of Fluid Mechanics, 858, 5-44 (PDF available).
Biegert, E., Vowinckel, B., & Meiburg, E. (2017). A collision model for grain-resolving simulations of flows over dense, mobile, polydisperse granular sediment beds. Journal of Computational Physics, 340, 105-127 (PDF available).
Fabian Kleischmann reports on his research stay in the USA
Ellen Krahl wins the Foundation award 2022 of the Chamber of Engineers Lower Saxony
Bernhard Vowinckel becomes Agnes Pockels Fellow of the TU Braunschweig
Press release of the TU Braunschweig
Entry in the database of the DFG
Youtube-Video about flocculation experiments on-board the International Space Station