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Zhang, H. (author), Schlangen, E. (author), Ge, Z. (author), Šavija, B. (author)Properties of concrete are, to a large extent, dependent on the properties of its binding constituent, hydrated cement paste. Therefore, knowledge of properties of hydrated cement paste is crucial for predicting concrete behaviour. This paper presents an experimentally informed approach for modelling elastic and transport properties of cement...conference paper 2021
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Xu, Zhiyuan (author), Zuo, Yibing (author), Ye, Guang (author)In this work, a numerical model is proposed to study chloride transport in alkali-activated materials. This model is based on multiple-relaxation-time lattice Boltzmann method, where particle distribution function is introduced to simulate the chloride binding and diffusion. This model takes into account diffusion, homogenous reaction between...conference paper 2021
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Romani, G. (author), Grande, E. (author), Avallone, F. (author), Ragni, D. (author), Casalino, D. (author)This paper proposes a CFD/CAA-based approach to predict the aerodynamic performances and tonal/broadband noise radiation of low-Reynolds number propellers at engineering level. Broadband self-noise prediction of low-Reynolds number propellers is particularly challenging, due to the requirement for the employed computational method to emulate...journal article 2021
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Xu, Z. (author), Zuo, Y. (author), Ye, G. (author)In this work, a numerical model is proposed to study chloride transport in alkali-activated materials. This model is based on multiple-relaxation-time lattice Boltzmann method, where particle distribution function is introduced to simulate the chloride binding and diffusion. This model takes into account diffusion, homogenous reaction between...conference paper 2021
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Zhang, H. (author), Schlangen, E. (author), Ge, Zhi (author), Šavija, B. (author)Properties of concrete are, to a large extent, dependent on the properties of its binding constituent, hydrated cement paste. Therefore, knowledge of properties of hydrated cement paste is crucial for predicting concrete behaviour. This paper presents an experimentally informed approach for modelling elastic and transport properties of cement...conference paper 2021
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Wu, J. (author), Wang, W. (author), Gao, Xifeng (author)Inspired by natural cellular materials such as trabecular bone, lattice structures have been developed as a new type of lightweight material. In this paper we present a novel method to design lattice structures that conform with both the principal stress directions and the boundary of the optimized shape. Our method consists of two major...journal article 2021
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de Oliveira Barbosa, J.M. (author), Faragau, Andrei B. (author), van Dalen, K.N. (author)The procedure presented in this work aims at providing a framework for studying settlement of ballast in zones with stiffness variation of the railway track support. The proposed procedure results from expanding an existing infinite periodic model of a railway track to account for variations in the stiffness of the foundation. Ballast is...journal article 2021
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Zhang, Y. (author), Tichem, M. (author), van Keulen, A. (author)Multi-stable metastructures composed of curved beams can switch to a series of stable configurations via elastic snap-through transitions. The elastic deformations allow metastructures to function as reusable energy absorbers. However, conventional metastructure designs based on solid beams often result in relatively low energy dissipation....journal article 2021
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Srinivasan, Sudharsan (author), van den Akker, H.E.A. (author), Shardt, Orest (author)Using an immersed boundary-lattice Boltzmann method, we investigated the response of dense granular suspensions to time-varying shear rates and flow reversals. The evolution of the relative apparent viscosity and particle structures was analysed. The concentration of solids (ϕ<sub>v</sub>) and particle Reynolds numbers (Re<sub>p</sub>) were...journal article 2021
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van den Akker, H.E.A. (author), Donkers, Renske (author), Zachariah, Githin T. (author), Shardt, Orest (author)The option of varying the molecular mass in multicomponent lattice Boltzmann simulations is being explored. First, results are presented for droplet formation at an aperture in a second immiscible liquid medium in which the difference in density between the two media is achieved by introducing asymmetry in the EOS, via adding particularly...journal article 2021
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Talebi, S. (author), Hedayati, R. (author), Sadighi, M. (author)<br/>journal article 2021
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Groenevelt, W.G.M. (author), Koelink, Erik (author)We study a Lax pair in a 2-parameter Lie algebra in various representations. The overlap coefficients of the eigenfunctions of L and the standard basis are given in terms of orthogonal polynomials and orthogonal functions. Eigenfunctions for the operator L for a Lax pair for sl(d+ 1 , C) is studied in certain representations.journal article 2021
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Chen, J. (author), Martin, Pablo (author), Xu, Z. (author), Manzano, Hegoi (author), Dolado, Jorge S. (author), Ye, G. (author)Portland cement is the most produced material in the world. The hydration process of cement consists of a group of complex chemical reactions. In order to investigate the mechanism of cement hydration, it is vital to study the hydration of each phase separately. An integrated model is proposed in this paper to simulate the dissolution of...journal article 2021
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Gao, Peng (author), Chen, Yang (author), Huang, Haoliang (author), Qian, Zhiwei (author), Schlangen, E. (author), Wei, Jiangxiong (author), Yu, Qijun (author)Non-uniform stresses, strains and microcracking of the concretes with three coarse aggregate sizes (5–10 mm, 10–16 mm, 16–20 mm) dried under 40% relative humidity (RH) for 60 days were quantified using digital image correlation and lattice fracture modelling. The influencing mechanism of coarse aggregate size on the drying-induced...journal article 2021
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Oh, Hyun Seok (author), Odbadrakh, Khorgolkhuu (author), Ikeda, Yuji (author), Mu, Sai (author), Körmann, F.H.W. (author), Sun, Cheng Jun (author), Ahn, Heh Sang (author), Yoon, Kook Noh (author), Ma, Duancheng (author), Tasan, Cemal Cem (author), Egami, Takeshi (author), Park, Eun Soo (author)Complex concentrated alloys (CCAs) are of growing interest due to their outstanding mechanical properties that exceed the property limits of conventional alloys. Whereas the superior properties are often attributed to severe lattice distortion, to date it is not clear what controls the lattice distortion and how it affects the mechanical...journal article 2021
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Gan, Y. (author), Zhang, Hongzhi (author), Liang, M. (author), Schlangen, E. (author), van Breugel, K. (author), Šavija, B. (author)In this study, a numerical model using a 2D lattice network is developed to investigate the fatigue behaviour of cement paste at the microscale. Images of 2D microstructures of cement pastes obtained from XCT tests are used as inputs and mapped to the lattice model. Different local mechanical and fatigue properties are assigned to different...journal article 2021
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Willemsen, Roger (author)Wingtip-mounted propellers have the ability to enhance the propeller-wing system performance. For inboard-up rotating tractor propellers, the swirl in the propeller slipstream can be used on the wing to reduce the influence of the wingtip vortex, decreasing drag. Furthermore, lift is enhanced by increasing dynamic pressure and angle of attack...master thesis 2020
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Khurana, Siddhant (author)Over the past decades, numerous methods have been used to study acoustic liners through their impedance, of which numerical methods are of particular interest. Despite their advantages, numerical methods are bounded by certain drawbacks. One such drawback stems from the need to accurately discretize the liner geometry, which can lead to large...master thesis 2020
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Janssen, V.A.E.C. (author)This thesis describes research into the interaction between electrons and various (pseudo) two-dimensional materials. This research is using two approaches: in Chapters 3 and 4 a low-energy electron microscope is used, and in Chapters 5 and 6 transport properties are studied. Chapter 1 introduces the concept of a two-dimensional material. First,...doctoral thesis 2020
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Lyu, W. (author)When concrete is subjected to sustained load, it first deforms elastically and then continues to deform with time. The stress-induced time-dependent deformation is, by definition, creep. Creep plays an important role in view of the serviceability, durability and sometimes even the safety of concrete structures. Prediction of the long-term creep...doctoral thesis 2020