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  • Meng, Birgit (6) (entfernen)

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  • 2011 (2)
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Modelling of fresh SCC flow through reinforced sections (2011)
Vasilic, Ksenija ; Kühne, Hans-Carsten ; Meng, Birgit ; Roussel, N.
Flow of fresh concrete through steel bars: a porous medium analogy (2011)
Vasilic, Ksenija ; Meng, Birgit ; Kühne, Hans-Carsten ; Roussel, N.
Although being a very promising area of concrete technology, computational modeling of fresh concrete flow is a comprehensive and time consuming task. The complexity and required computation time are additionally increased when simulating casting of heavily reinforced sections, where each single reinforcement bar has to be modeled. In order to improve the computation speed and to get closer to a practical tool for simulation of casting processes, an innovative approach to model reinforced sections is proposed here. The basic idea of this approach is to treat the reinforcement zone as a porous medium in which a concrete is propagating. In the present paper, the numerical implementation of this concept is described. A methodology allowing for the computation of the equivalent permeability of the steel bars network is suggested. Finally, this numerical technique efficiency is evaluated by a comparison with experimental results of model fluids casting in model formworks.
Computational modeling of SCC flow through reinforced sections (2010)
Vasilic, Ksenija ; Roussel, N. ; Meng, Birgit ; Kühne, Hans-Carsten
Computational modeling of fresh SCC flow is a comprehensive and time consuming task. The computational time is additionally increased when simulating casting of reinforced sections, where each single reinforcement bar has to be modeled. In order to deal with this issue and to decrease the computational time, an innovative approach of treating a reinforcement network as a porous medium is applied. This contribution presents the model for concrete flow through reinforced sections, based on Computational Fluid Dynamics (CFD), coupling a single-phase flow model for SCC and a continuum macroscopic model for porous medium. In the last part of this paper, numerical simulations are compared with experimental results obtained on model fluids.
Computational modelling of scc flow: reinforcement network modelled as a porous medium (2009)
Vasilic, Ksenija ; Meng, Birgit ; Kühne, Hans-Carsten
Experimental and numerical studies on calibration of a rotational rheometer for cementitious materials (2009)
Vasilic, Ksenija ; Schmidt, Wolfram ; Kühne, Hans-Carsten ; Meng, Birgit
Computational modelling of SCC flow: Reinforcement network modelled as porous medium (2009)
Vasilic, Ksenija ; Roussel, N. ; Meng, Birgit ; Kühne, Hans-Carsten
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