scholarly journals The dual scale model of weighing reasons

Noûs ◽  
2021 ◽  
Author(s):  
Chris Tucker
Keyword(s):  
Scale Model ◽  
Dual Scale

scholarly journals Ply fragmentation in unidirectional hybrid composites linked to stochastic fibre behaviour: A dual-scale model

2019 ◽  
Vol 181 ◽  
pp. 107702 ◽  
Author(s):  
Francisco Mesquita ◽  
Yentl Swolfs ◽  
Stepan V. Lomov ◽  
Larissa Gorbatikh
Keyword(s):  
Hybrid Composites ◽  
Scale Model ◽  
Unidirectional Hybrid ◽  
Dual Scale

On the Use of a Dual-Scale Model to Improve Understanding of a Pharmaceutical Freeze-Drying Process

2010 ◽  
Vol 99 (10) ◽  
pp. 4337-4350 ◽  
Author(s):  
Valeria Rasetto ◽  
Daniele L. Marchisio ◽  
Davide Fissore ◽  
ANTONELLO A. Barresi
Keyword(s):  
Freeze Drying ◽  
Scale Model ◽  
Drying Process ◽  
Dual Scale

A Dual-Scale LES Subgrid Model for Turbulent Liquid/Gas Phase Interface Dynamics

2015 ◽  
Author(s):  
Marcus Herrmann
Keyword(s):  
Surface Tension ◽  
Numerical Simulations ◽  
Gas Phase ◽  
Isotropic Turbulence ◽  
Phase Interface ◽  
Spatial Filtering ◽  
Direct Numerical Simulations ◽  
Scale Model ◽  
Interface Dynamics ◽  
Dual Scale

Turbulent liquid/gas phase interface dynamics are at the core of many applications. For example, in atomizing flows, the properties of the resulting liquid spray are determined by the interplay of fluid and surface tension forces. The resulting dynamics typically span 4–6 orders of magnitude in length scales, making direct numerical simulations exceedingly expensive. This motivates the need for modeling approaches based on spatial filtering or ensemble averaging. In this paper, a dual-scale modeling approach is presented to describe turbulent two-phase interface dynamics in a large-eddy-simulation-type spatial filtering context. To close the unclosed terms related to the phase interface arising from filtering the Navier-Stokes equation, a resolved realization of the phase interface dynamics is explicitly filtered. This resolved realization is maintained on a high-resolution over-set mesh using a Refined Local Surface Grid approach [1] employing an un-split, geometric, bounded, and conservative Volume-of-Fluid method [2]. The required model for the resolved realization of the interface advection velocity includes the effects of sub-filter surface tension, dissipation, and turbulent eddies. Results of the dual-scale model are compared to recent direct numerical simulations of an interface in homogeneous isotropic turbulence [3].

Modelling Tow Impregnation of Woven Fabric Reinforcements and Its Application in Liquid Composite Moulding Process Modelling

2008 ◽  
Author(s):  
Y. Wang ◽  
S. M. Grove ◽  
M. Moatamedi
Keyword(s):  
Woven Fabric ◽  
Scale Model ◽  
Flow Front ◽  
Moulding Process ◽  
Mathematical Algorithm ◽  
Model Liquid ◽  
Liquid Composite Moulding ◽  
Sink Term ◽  
Time Required ◽  
Dual Scale

This paper proposes a detail physical model for the micro-scale flow in plain woven reinforcements. The modelling results are formulated into a mathematical algorithm which is then directly incorporated into a continuum dual-scale model as a ‘sink’ term. When used to model liquid composite moulding (LCM) processes, this incorporated dual-scale model demonstrates the fact that the impregnation of fibre tows lags behind the resin front in macro pore spaces. The modelling results are in agreement with the experimental observations. It has been shown that the unsaturated region at the flow front could increase or have a fixed length under different circumstances. These differences are explained due to the variation in tow impregnation speed (or the time required for the tow to become fully impregnated) which is related to the weave infrastructure and the nesting and packing of plies. The modelling results have also demonstrated the drooping of the inlet pressure when the flow processes are carried out under constant injection rates.

A Dual Scale Model for Macrosegregation in Alloy Solidification

2011 ◽  
Vol 59 (12) ◽  
pp. 934-953 ◽  
Author(s):  
R. Pardeshi ◽  
A. K. Singh ◽  
V. R. Voller ◽  
P. Dutta
Keyword(s):  
Scale Model ◽  
Alloy Solidification ◽  
Dual Scale

Investigation of Heat Transfer and Cure During the Unsaturated Flow in Woven, Stitched and Unbraided Mats

2003 ◽  
Author(s):  
Rajendra S. Jadhav ◽  
Krishna M. Pillai
Keyword(s):  
Unsaturated Flow ◽  
Polymer Matrix Composites ◽  
Numerical Study ◽  
Control Volume ◽  
Scale Model ◽  
Liquid Composite Molding ◽  
Matrix Composites ◽  
Fiber Mats ◽  
Significant Difference ◽  
Dual Scale

This numerical study investigates heat generation and cure during the unsaturated flow of thermosetting resins in woven, stitched or braided fiber mats during mold filling in liquid composite molding (LCM), a popular technology to manufacture polymer-matrix composites. This study is relevant to those mats, which can be characterized as a dual-scale porous medium. An iterative, control-volume approach, based on energy and cure balances in a two-layer model representing fiber tows and gaps between tows, is used for developing discretized equations for average temperatures and cures in the tows and gaps respectively. A significant difference in the temperatures and cures of the gap and tow regions is observed. The proposed model deviates significantly from the conventional single-scale model used in most LCM simulations and highlights the need to adopt a different approach in modeling cure and temperature in dual-scale fiber mats.

A dual-scale model for the caveolin-mediated vesiculation

Soft Matter ◽  
2013 ◽  
Vol 9 (33) ◽  
pp. 7981 ◽  
Author(s):  
Xudong Liang ◽  
Yan Zu ◽  
Yan-Ping Cao ◽  
Chun Yang
Keyword(s):  
Scale Model ◽  
Dual Scale

scholarly journals Prediction of fracture behavior in hole expansion test using microstructure based dual-scale model

2018 ◽  
Vol 1063 ◽  
pp. 012018
Author(s):  
Siwook Park ◽  
Jinwook Jung ◽  
Sung II Kim ◽  
Seok-Jong Seo ◽  
Myoung-Gyu Lee ◽  
...  
Keyword(s):  
Fracture Behavior ◽  
Scale Model ◽  
Hole Expansion ◽  
Expansion Test ◽  
Hole Expansion Test ◽  
Dual Scale
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