Raphaël Comminal
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View article: Computational fluid dynamics modelling and experimental analysis of reinforcement bar integration in 3D concrete printing
Computational fluid dynamics modelling and experimental analysis of reinforcement bar integration in 3D concrete printing Open
A challenge for 3D Concrete Printing is to incorporate reinforcement bars without compromising the concrete-rebar bonding. In this paper, a Computational Fluid Dynamics (CFD) model is used to analyze the deposition of concrete around pre-i…
View article: Computational analysis of yield stress buildup and stability of deposited layers in material extrusion additive manufacturing
Computational analysis of yield stress buildup and stability of deposited layers in material extrusion additive manufacturing Open
This paper investigates the stability of deformable layers produced by material extrusion additive manufacturing. A Computational Fluid Dynamics (CFD) model is developed to predict the deposition flow of viscoplastic materials such as cera…
Investigation on corner precision at different corner angles in material extrusion additive manufacturing: An experimental and computational fluid dynamics analysis Open
This paper investigates the influence of different corner angles on microscale geometry in material extrusion additive manufacturing. Polylactic acid (PLA) was 3D-printed with corner angles of 15°, 30°, 45°, 60°, 75°, 90°, and 135° using B…
Numerical simulation of multi-layer 3D concrete printing Open
This paper presents a computational fluid dynamics model fit for multi-layer 3D Concrete Printing. The numerical model utilizes an elasto-visco-plastic constitutive model to mimic the flow behaviour of the cementitious material. To validat…
Three-dimensional cellwise conservative unsplit geometric VOF schemes Open
This work presents two unsplit geometric VOF schemes that extend the two-dimensional cellwise conservative unsplit (CCU) scheme [Comminal et al., J. Comput. Phys. 283 (2015) 582–608] to three dimensions. The novelty of the 3D-CCU schemes l…
Modelling of Material Deposition in Big Area Additive Manufacturing and 3D Concrete Printing Open
Big area additive manufacturing and 3D concrete printing are two technologies that upscale the material extrusion additive manufacturing concept to larger workpiece dimensions and higher build rates. This work presents a computation fluid …
Multiphysics modelling of manufacturing processes: A review Open
Numerical modelling is increasingly supporting the analysis and optimization of manufacturing processes in the production industry. Even if being mostly applied to multistep processes, single process steps may be so complex by nature that …
Numerical Modeling of the Material Deposition and Contouring Precision in Fused Deposition Modeling Open
We present a numerical model of the material deposition in fused deposition modeling. The flow of the material extruded from the printing head nozzle is simulated within the computation fluid dynamics (CFD) paradigm. The molten thermoplast…
Numerical Study of the Impact of Shear Thinning Behaviour on the Strand Deposition Flow in the Extrusion-Based Additive Manufacturing Open
This paper investigates the influence of shear-rate dependent viscosity on the strand deposition flow during Extrusion-Based Additive Manufacturing. Extrusion-Based Additive Manufacturing, also known as Fused Deposition Modeling (FDM), is …
Numerical Prediction of the Porosity of Parts Fabricated with Fused Deposition Modeling Open
In this paper, we study the effect of the printing parameters, namely the layer thickness and the strand-to-strand distance, on the porosity of components produced with Fused Deposition Modeling (FDM). The FDM process is based on the extru…
Numerical simulation of extrusion-based additive manufacturing - Effect of the nozzle geometry on the strand cross-section Open
The shape of the printed strand in extrusion-based additive manufacturing is an important factor that affects the surface roughness and the geometrical accuracy of the 3D printing fabrication. We used Computational Fluid Dynamics simulatio…
Numerical simulation of the planar extrudate swell of pseudoplastic and viscoelastic fluids with the streamfunction and the VOF methods Open
We present an Eulerian free-surface flow solver for incompressible pseudoplastic and viscoelastic non-Newtonian fluids. The free-surface flow solver is based on the streamfunction flow formulation and the volume-of-fluid method. The stream…