Slip transition in dynamic wetting for a generalized Navier boundary condition

Rougier, Valentin; Cellier, Julien; Gomina, Moussa; Bréard, Joël

doi:10.1016/j.jcis.2020.09.015

Cited by 7 publications

(2 citation statements)

References 62 publications

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“…Several works have made use of existing flow simulation software such as LIMS and introduced additional terms to account for the dual scale effects (Schell et al, 2007;Lawrence et al, 2009;Simacek et al, 2010;Facciotto et al, 2021). Similarly, finite element solvers are coupled with level-set for tracking the free surface and enriched for accounting for multiscale effects at the air-liquid-solid interface (Liu et al, 2016;Chevalier et al, 2018;Andriamananjara et al, 2019;Rougier et al, 2021) with capability of modeling wetting and non-wetting systems as well as the transition or to predict the average capillary pressure evolution in between individual fibers (Yeager et al, 2016). In recent years, there has also been interest towards the use of other numerical approaches to account for the dual scale effects using particle based solvers (Yashiro et al, 2019;Yoshihara et al, 2020) or boundary elements (Patiño and Nieto-Londoño, 2021).…”

Section: Unsaturated Flow Modelsmentioning

confidence: 99%

Capillary Effects in Fiber Reinforced Polymer Composite Processing: A Review

et al. 2022

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Capillarity plays a crucial role in many natural and engineered systems, ranging from nutrient delivery in plants to functional textiles for wear comfort or thermal heat pipes for heat dissipation. Unlike nano- or microfluidic systems with well-defined pore network geometries and well-understood capillary flow, fiber textiles or preforms used in composite structures exhibit highly anisotropic pore networks that span from micron scale pores between fibers to millimeter scale pores between fiber yarns that are woven or stitched into a textile preform. Owing to the nature of the composite manufacturing processes, capillary action taking place in the complex network is usually coupled with hydrodynamics as well as the (chemo) rheology of the polymer matrices; these phenomena are known to play a crucial role in producing high quality composites. Despite its importance, the role of capillary effects in composite processing largely remained overlooked. Their magnitude is indeed rather low as compared to hydrodynamic effects, and it is difficult to characterize them due to a lack of adequate monitoring techniques to capture the time and spatial scale on which the capillary effects take place. There is a renewed interest in this topic, due to a combination of increasing demand for high performance composites and recent advances in experimental techniques as well as numerical modeling methods. The present review covers the developments in the identification, measurement and exploitation of capillary effects in composite manufacturing. A special focus is placed on Liquid Composite Molding processes, where a dry stack is impregnated with a low viscosity thermoset resin mainly via in-plane flow, thus exacerbating the capillary effects within the anisotropic pore network of the reinforcements. Experimental techniques to investigate the capillary effects and their evolution from post-mortem analyses to in-situ/rapid techniques compatible with both translucent and non-translucent reinforcements are reviewed. Approaches to control and enhance the capillary effects for improving composite quality are then introduced. This is complemented by a survey of numerical techniques to incorporate capillary effects in process simulation, material characterization and by the remaining challenges in the study of capillary effects in composite manufacturing.

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Section: Unsaturated Flow Modelsmentioning

confidence: 99%

Capillary Effects in Fiber Reinforced Polymer Composite Processing: A Review

et al. 2022

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“…During the impregnation of resin in the fibre network, there is a competition between viscous and capillary effects that are related to the dimensionless capillary number Ca [13][14][15][16][17]. Different type of defects at different localisation can occur during manufacturing depending on the Ca.…”

Section: Equivalence Law For Capillary Pressure (P Cap )mentioning

confidence: 99%