Journal article
Modelling of 3D concrete printing based on computational fluid dynamics
Department of Mechanical Engineering, Technical University of Denmark1
Manufacturing Engineering, Department of Mechanical Engineering, Technical University of Denmark2
Danish Technological Institute3
Department of Civil Engineering, Technical University of Denmark4
Structures and Safety, Department of Civil Engineering, Technical University of Denmark5
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.
| Language: | English |
|---|---|
| Year: | 2020 |
| Pages: | 106256 |
| ISSN: | 00088846 and 18733948 |
| Types: | Journal article |
| DOI: | 10.1016/j.cemconres.2020.106256 |
| ORCIDs: | Comminal, Raphael , Stang, Henrik and Spangenberg, Jon |
