Viscous drag and rod orientation kinematics in an orthotropic fluid
Article dans une revue avec comité de lecture
A model is proposed, where the evolution of the orientation of each fiber is coupled to the orientations of the surrounding fibers in the flow of a fiber-filled fluid and includes the effects of the fiber volume fraction and aspect ratio. This is performed by accounting for the effective behavior of the fiber-filled fluid, which is anisotropic although the fibers are embedded in an isotropic Newtonian fluid. The rotation of a fiber in these conditions is predicted by a dumbbell model, which allows an extension of Jeffery's equation to anisotropic cases. This involves the numerical evaluation of the drag force applied on a sphere in an orthotropic incompressible fluid, which is evaluated by finite element simulations. A simple fit is proposed for the practical use of the coupled model, which is applied finally to the orientation kinematics of a population of fibers in a simple shear flow, and the results are compared with the ones given by the standard uncoupled approach.
Files in this item
Showing items related by title, author, creator and subject.
Numerical experiments on unsupervised manifold learning applied to mechanical modeling of materials and structures Article dans une revue avec comité de lectureIBANEZ, Ruben; GILORMINI, Pierre; CUETO, Elias; CHINESTA, Francisco (Elsevier Masson, 2020)The present work aims at analyzing issues related to the data manifold dimensionality. The interest of the study is twofold: (i) first, when too many measurable variables are considered, manifold learning is expected to ...
Article dans une revue avec comité de lectureYUN, Minyoung; ARGERICH MARTIN, Clara; GIORMINI, Pierre; CHINESTA, Francisco; ADVANI, Suresh G. (MDPI, 2020)Fiber-fiber interaction plays an important role in the evolution of fiber orientation in semi-concentrated suspensions. Flow induced orientation in short-fiber reinforced composites determines the anisotropic properties ...
Article dans une revue avec comité de lectureMONTAGUD, Santiago; AGUADO, José Vicente; CHINESTA, Francisco; JOYOT, Pierre (Elsevier, 2020)This paper is concerned with the computation of the inverse impulse response of a parametrized structural dynamics problem using reduced-order modeling and randomized excitations. A two-stages approach is proposed, involving ...
Article dans une revue avec comité de lectureMONTÁNS, Francisco J.; CHINESTA, Francisco; GÓMEZ-BOMBARELLI, Rafael; KUTZ, J. Nathan (Hindawi Limited, 2019)no abstract