Tag: rough surfaces
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Paper accepted (Int J Hydrogen Energy) on droplet dynamics in PEMFC channels
Bao, Y., Gan, Y. (2020) Roughness effects of gas diffusion layers on droplet dynamics in PEMFC flow channels. International Journal of Hydrogen Energy, in press. Abstract: Water management remains one of the major challenges in optimising the performance of PEMFCs, in which liquid accumulation and removal in gas diffusion layers (GDLs) and flow channels should be…
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Paper accepted (Langmuir) on wetting transition in porous media
Wang, Z; Pereira, J.M.; Gan, Y. (2020) Effect of wetting transition during multiphase displacement in porous media. Langmuir, in press. Abstract: The effects of wettability on multiphase displacement in porous media have been studied extensively in the past, and the contact angle is identified as an important factor influencing the displacement patterns. At the same time, it…
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Paper accepted (Chem Eng Sci) on LBM-PNM for immiscible flow
Suo, S., Liu, M. and Gan, Y. (2020) An LBM-PNM framework for immiscible flow: With applications to droplet spreading on porous surfaces. Chemical Engineering Science, in press. [DOI] Abstract: The behaviour of droplets on porous media, combining the spreading above and imbibition into the medium, is of foundational interests for a series of applications. In this work,…
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Paper online (Int J Solids and Structures) on rough sphere contacts
Wei, D., Zhai, C., Hanaor, D., Gan, Y. (2020) Contact behaviour of simulated rough spheres generated with spherical harmonic. International Journal of Solids and Structures, in press. [DOI] Abstract: Normal contact behaviour between non-adhesive fractal rough particles is studied using a finite element method (FEM). A series of spherical grain surfaces with distinguished roughness features are…
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Paper accepted (Eng Fracture Mech) on non-spherical particle breakage
Wei, D., Zhao, B., Dias-da-Costa, D., Gan, Y. (2019) An FDEM study of particle breakage under rotational point loading. Engineering Fracture Mechanics. In press. [DOI] Abstract: The most commonly adopted method to test the strength of single sand particles is based on platen experiments. This setup tends to align the loading direction towards the particle minimum…
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Honour thesis student awarded with poster prize
Mr Xu Wang, an honour thesis student working on numerical modelling of capillary forces between rough interfaces in our group, has been awarded with John Main 2nd Prize for Poster Presentation event on 3 November, 2017. The Poster Presentation 2017 is the School of Civil Engineering’ major annual event to showcase the research undertaken by…
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Paper online (Int J Mech Sci) on contact mechancis
Zhai, C., Hanaor, Gan, Y. (2017) Contact stiffness of multiscale surfaces by truncation analysis. International Journal of Mechanical Sciences. 131–132: 305–316. [DOI][PDF:048_IJMS_2017] Abstract: In this paper, we study the contact stiffness of a fractal rough surface compressed by a rigid flat plane. A numerical model based on the analysis of flat punch indentation is proposed for simulated hierarchical surfaces,…
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Papers accepted (EML, AIP advances, and NME)
[1] Chongpu Zhai, Dorian Hanaor, Gwénaëlle Proust, Laurence Brassart, Yixiang Gan (2016). Interfacial electro-mechanical behaviour at rough surfaces. Extreme Mechanics Letters. in press. DOI [2] Mingchao Liu, Jian Wu, Yixiang Gan, C.Q. Chen (2016). The pore-load modulus of ordered nanoporous materials with surface effects. AIP Advances. in press. [3] Raghuram Karthik Desu, Yixiang Gan, Marc Kamlah, Ratna Kumar Annabattula (2016).…
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Paper online: The Role of Surface Structure in Normal Contact Stiffness (Experimental Mechanics)
C. Zhai , Y. Gan, D. Hanaor, G. Proust, D. Retraint. The Role of Surface Structure in Normal Contact Stiffness. Experimental Mechanics. In press. [DOI:10.1007/s11340-015-0107-0] Link: http://link.springer.com/article/10.1007/s11340-015-0107-0/fulltext.html Abstract: The effects of roughness and fractality on the normal contact stiffness of rough surfaces were investigated by considering samples of isotropically roughened aluminium. Surface features of samples were…
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Manuscripts accepted
Three manuscripts have been accept by Géotechnique, Engineering Fracture Mechanics, Experimental Mechanics, respectively. (1) Dorian Hanaor, Yixiang Gan, Max Revay, David Airey, Itai Einav (2015). 3D Printable Geomaterials. Géotechnique (in press). (2) Mingchao Liu, Yixiang Gan, Dorian Hanaor, Bin Liu, Changqing Chen (2015). An improved semi-analytical solution for stress at round-tip notches. Engineering Fracture Mechanics (in press). (3) Chongpu Zhai, Yixiang Gan, Dorian…
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Paper online on Static friction at fractal interfaces (Tribology International)
Dorian Hanaor, Yixiang Gan, and Itai Einav. “Static friction at fractal interfaces.” Tribology International (in press). DOI: http://dx.doi.org/10.1016/j.triboint.2015.09.016 Abstract: Tribological phenomena are governed by combined effects of material properties, topology and surface-chemistry. We study the interplay of multiscale surface structures with molecular-scale interactions towards interpreting static frictional interactions at fractal interfaces. By spline-assisted-discretization we analyse asperity interactions…
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Paper accepted (J Engineering Mechanics) on electrical contact resistance
Title: Stress-Dependent Electrical Contact Resistance at Fractal Rough Surfaces Author(s): Chongpu Zhai , Dorian Hanaor , Gwénaëlle Proust , Yixiang Gan Journal of Engineering Mechanics (ASCE), in press. [DOI:10.1061/(ASCE)EM.1943-7889.0000967] Figure: Stress-dependent Electrical Contact Resistance (ECR) of different surfaces under various loading levels.
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Paper accepted (IJSS) on contact mechanics of rough surfaces
Title: “Contact mechanics of fractal surfaces by spline assisted discretization.” Author(s): Hanaor, Dorian; Gan, Yixiang; Einav, Itai. International Journal of Solids and Structures (in press). [DOI: 10.1016/j.ijsolstr.2015.01.021] Figure: Contact mechanics of self-affine surfaces.
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Paper accepted (Langmuir) on scalable surface area characterisation
Title: “Scalable surface area characterisation by electrokinetic analysis of complex anion adsorption” [DOI: 10.1021/la503581e] Author(s): Hanaor, Dorian; Ghadiri, Maliheh; Chrzanowski, Wojciech; Gan, Yixiang Figure 1. SEM micrographs of Al2O3 powders used in the present study.
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Paper on arXiv: Normal contact stiffness
Chongpu Zhai, Sébastien Bevand, Yixiang Gan, Dorian Hanaor, Gwénaëlle Proust, Bruno Guelorget, Delphine Retraint (2014) Measurement of normal contact stiffness of fractal rough surfaces. We investigate the effects of roughness and fractality on the normal contact stiffness of rough surfaces. Samples of isotropically roughened aluminium surfaces are considered. The roughness and fractal dimension were altered…