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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/42497

Title: 3D hybrid Cartesian/immersed-boundary finite-element analysis of heat and flow patterns in a two-roll mill
Authors: C.L. Chiu;C.M. Fan;D.L. Young
Contributors: 國立臺灣海洋大學:河海工程學系
Keywords: Three-dimensional Navier–Stokes equations;Two-roll mill;Forced convection;Hybrid Cartesian/immersed-boundary method;Finite-element method
Date: 2009-03
Issue Date: 2017-05-18T02:21:05Z
Publisher: International Journal of Heat and Mass Transfer
Abstract: Abstract:A fully three-dimensional time-dependent Navier–Stokes model with forced convection is developed to numerically investigate the heat and flow patterns of the two-roll mill system with two inner rotating cylinders. Such direct numerical simulations are usually limited by the difficulties from huge computational cost and complex boundary treatment. For a fast numerical process, we can use the operator-splitting scheme with the BTD term to advance the solution in temporal evolution. To implement the calculation over a Cartesian grid, the hybrid Cartesian/immersed-boundary finite-element method is employed for spatial discretization. In the authors’ previous study [D.L. Young, C.L. Chiu, C.M. Fan, A hybrid Cartesian/immersed-boundary finite-element method for simulating heat and flow patterns in a two-roll mill, Numer. Heat Transfer B 51 (3) (2007) 251–274], we have developed a simplified 2D numerical model to analyze the heat and flow patterns on the cross section of two-roll-mill flow under the assumption of infinite length in the third (vertical) direction. However, the 2D solutions could not completely represent the realistic physical phenomena unless a 3D algorithm is developed. In this study we then paid the particular attention to develop a 3D model to investigate the vertical heat and flow behaviors, including 3D features of the vortex structure, periodic oscillation and chaotic instabilities. It is found that the proposed 3D model is able to cover the 2D features if the assumptions of 2D conditions are fulfilled.
Relation: 52(7-8), pp.1677-1689
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/42497
Appears in Collections:[河海工程學系] 期刊論文

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