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논문 기본 정보

자료유형
학술저널
저자정보
Hwang, Wook-Ryol (School of Mechanical and Aerospace Engineering, Research Center for Aircraft Parts Technology [ReCAPT], Gyeongsang National University) Hulsen Martien A. (Department of Mechanical Engineering, Eindhoven University of Technology)
저널정보
한국유변학회 Korea-Australia rheology journal Korea-Australia rheology journal 제18권 제4호
발행연도
2006.1
수록면
171 - 181 (11page)

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We present a short review for authors' previous work on direct numerical simulations for inertialess hard particle suspensions formulated either with a Newtonian fluid or with viscoelastic polymeric fluids to understand the microstructural evolution and the bulk material behavior. We employ two well-defined bi-periodic domain concepts such that a single cell problem with a small number of particles may represent a large number of repeated structures: one is the sliding bi-periodic frame for simple shear flow and the other is the extensional bi-periodic frame for planar elongational flow. For implicit treatment of hydrodynamic interaction between particle and fluid, we use the finite-element/fictitious-domain method similar to the distributed Lagrangian multiplier (DLM) method together with the rigid ring description. The bi-periodic boundary conditions can be effectively incorportated as constraint equations and implemented by Lagrangian multipliers. The bulk stress can be evaluated by simple boundary integrals of stresslets on the particle boundary in such formulations. Some 2-D example results are presented to show effects of the solid fraction and the particle configuration on the shear and elongational viscosity along with the micro-structural evolution for both particles and fluid. Effects of the fluid elasticity has been also presented.

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