Modelling of 3D concrete printing based on computational fluid dynamics

By Raphaël Comminal, W. R. L. Silva, Thomas J. Andersen, H. Stang, Jon Spangenberg. Cement and Concrete Research, 2020

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Abstract This paper presents a computational fluid dynamic model of 3D Concrete Printing. The numerical simulation is used to predict the cross-sectional shape of 3D printed segments through “virtual printing” simulations. An experimental parametric study of the layer geometry is also conducted for a wide range of processing printing speeds and nozzle heights. The constitutive behavior of the cement-based mortar used in experiments is characterized by rotational and oscillatory rheological tests, and it is modelled with a Bingham constitutive law. Moreover, two formulations of the constitutive law are used in the simulations: the generalized Newtonian fluid model, and the elasto-visco-plastic fluid. Overall, the numerical results agree well with the experiments, validating the proposed computational fluid dynamics modelling approach. Finally, an example of multi-layer print simulations as well as research prospects are presented.

Subfields: Automotive Engineering, Biomedical Engineering, Building and Construction

View Paper: https://www.semanticscholar.org/paper/5b38484a3f3bfc4c19ba2bbf1cd246b598782ab3

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