Numerical modelling of contact heat transfer problem with work hardened rough surfaces

Murashov, Mikhail V.; Panin, S. D.

doi:10.1016/j.ijheatmasstransfer.2015.06.024

Cited by 45 publications

(17 citation statements)

References 52 publications

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“…The asperities of higher level will change the real contact area. The calculations carried out in the first approximation show the tendency for it to decrease [7,16]. The quantitation of influence of higher level asperities at elastic-plastic material behavior is a key issue for future research.…”

Section: Resultsmentioning

confidence: 97%

“…Rigid fixing of the lower plane of the bodies is admissible in such model elastic-plastic problem, but it disallows comparing results at high pressures with those of real constructions (especially on x 3 -axis). When modeling near-surface volumes of real constructions with columnar models similar to those provided in [7,46], the adequate deformation of the column volume is possible if stress ߪ ଷଷ on the lower plane do not exceed the initial elastic limit of the material used. The results of calculations are reported in the Table 1 and in Figure 4, 10.…”

Section: Modeling the Flattening Of Surface Protrusionsmentioning

confidence: 99%

“…There are smaller asperities based on the surface of bigger ones and called asperities of higher level. These asperities are included in widely adopted multilevel [4] and fractal [5][6][7][8][9][10][11][12] 3D models of roughness. The additional question is specific for such models -whether preservation of rough profile on an asperity surface is possible while deforming by a rigid plane i.e.…”

Section: Introductionmentioning

confidence: 99%

“…To date a number of models of thermal contact conductance through multi-spot contact are developed, for example, see [7,[13][14][15][16], from which it is possible to distinguish finite element models [7,15,16]. It is to finiteelement models that they are increasingly turning to validate analytical stochastic models, for example, [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

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A Condition for Complete Flattening of Asperities in a Rough Contact

Murashov

2018

MATEC Web Conf.

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Considering rough surface profiles in a contact model is of decisive importance. In the up-to-date rough contact models there remained underexplored the opportunity of complete flattening of smaller asperities and therefore the need of using the multilevel roughness models, including fractal ones. If higher level asperities are not flattened completely when pressed, then they will be able to impact on the contact process. This paper considers model problems of elastic-plastic contact with hardening for a body with protrusions and two pyramids as the objects similar to asperities. Modeling results show that asperities are completely flattened only on condition of confined compression. For real contacting rough surfaces under low pressures, complete flattening of asperities will not occur. It is shown that roughness elements on the surface of the asperities do not disappear even at severe deformation of the latter. The reason is a combination of the asperity form and hardening of material, while the consequence is a reduction of the real contact area.

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Section: Resultsmentioning

confidence: 97%

Section: Modeling the Flattening Of Surface Protrusionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Condition for Complete Flattening of Asperities in a Rough Contact

Murashov

2018

MATEC Web Conf.

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“…Finite element methods (FEM) have been used in the modelling of microscopic contact roughness and/or mechanical interactions [14,24,27,31]. More advanced work included modelling of the contact roughness structure and deformations together with contact heat transfer [22]. However, these works aim to model mechanical and thermal interactions of a specific contact configuration rather than study of the overall heat distribution across multiple contacting solid bodies.…”

Section: Introductionmentioning

confidence: 99%

Capturing heat transfer for complex-shaped multibody contact problems, a new FDEM approach

et al. 2020

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This paper presents a new approach for the modelling of heat transfer in 3D discrete particle systems. Using a combined finite-discrete element (FDEM) method, the surface of contact is numerically computed when two discrete meshes of two solids experience a small overlap. Incoming heat flux and heat conduction inside and between solid bodies are linked. In traditional FEM (finite element method) or DEM (discrete element method) approaches, to model heat transfer across contacting bodies, the surface of contact is not directly reconstructed. The approach adopted here uses the number of surface elements from the penetrating boundary meshes to form a polygon of the intersection, resulting in a significant decrease in the mesh dependency of the method. Moreover, this new method is suitable for any sizes or shapes making up the particle system, and heat distribution across particles is an inherent feature of the model. This FDEM approach is validated against two models: a FEM model and a DEM pipe network model. In addition, a multi-particle heat transfer contact problem of complex-shaped particles is presented.

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High‐order accurate conjugate heat transfer solutions with a finite volume method in anisotropic meshes with application in polymer processing

Costa

Nóbrega

Clain

et al. 2021

Numerical Meth Engineering

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The computational modeling has become an indispensable tool to support the engineering design and control of many industrial processes. In polymer processing applications, the simulation of conjugate heat transfer phenomena is critical as rigorous temperature control is necessary to ensure that the produced parts meet the required specifications. In this article, a high-order accurate finite volume method is proposed to improve the numerical accuracy and the computational efficiency of conjugate heat transfer simulations with application in polymer processing. Anisotropic meshes are investigated to significantly reduce the number of unknowns in convection-dominated problems where the higher temperature variations occur perpendicularly to curved boundaries and interfaces. The reconstruction for off-site data method based on polynomial reconstructions is employed to fulfill the prescribed boundary and interface conditions solely using polygonal meshes to avoid the limitations of curved mesh approaches. A code verification benchmark based on manufactured solutions proves that the proposed method provides a fourth-order of convergence and is computationally more cost-effective than the classical second-order of convergence. Moreover, meshes with higher aspect ratios improve the calculation efficiency but suffer from a small accuracy penalty due to conditioning deterioration. Comparison with the classical finite volume discretization techniques, widely implemented in commercial and open-source software packages, is also provided. The applicability and performance of the proposed method are further supported with a practical case study for the sheet extrusion cooling stage. K E Y W O R D Sanisotropic polygonal meshes, conjugate heat transfer problems, curved boundaries and interfaces, high-order accurate finite volume method, OpenFOAM® software, polymer processing applications 1146

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Numerical modelling of contact heat transfer problem with work hardened rough surfaces

Cited by 45 publications

References 52 publications

A Condition for Complete Flattening of Asperities in a Rough Contact

A Condition for Complete Flattening of Asperities in a Rough Contact

Capturing heat transfer for complex-shaped multibody contact problems, a new FDEM approach

High‐order accurate conjugate heat transfer solutions with a finite volume method in anisotropic meshes with application in polymer processing

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