On the deformation of fibrous suspensions

Document identifier: oai:DiVA.org:ltu-75701
Keyword: Engineering and Technology, Mechanical Engineering, Fluid Mechanics and Acoustics, Teknik och teknologier, Maskinteknik, Strömningsmekanik och akustik, Strömningslära, Fluid Mechanics
Publication year: 2019
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SDG 3 Good health and wellbeing
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Abstract:

An understanding of the rheology and dynamics of the deformation of fibrous suspension as a multiphase fluid is important in order to be able to fully disclose the flow behaviour from very low to very high shear rates. In this study, a flexible fibre model has been implemented in an open source Computational Fluid Dynamics code. The three-dimensional Navier-Stokes equations which describe the fluid motion are employed while the fibrous phase of the fluid is modeled as chains of fiber segments interacting with the fluid through viscous- and drag forces. The aim of this study is to investigate the fibre dynamics against several orbit classes - i.e. rigid, springy, flexible and complex rotation of the fibres1-3 enabling the model to have all degrees of freedom - translation, rotation, bending and twisting. The simulations are performed using the OpenFOAM open source software.

Authors

Naser Hamedi

Luleå tekniska universitet; Strömningslära och experimentell mekanik
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Lars-Göran Westerberg

Luleå tekniska universitet; Strömningslära och experimentell mekanik
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