274 Result(s)
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Open AccessA statistical boundary for 3D rarefied flows through meshes: implementation to a new version of dsmcFoam+ and wind tunnel validation
The Direct Simulation Monte Carlo (DSMC) method has become a standard tool for rarefied aerodynamics and microchannel flows. However, the performance benefits of DSMC, such as adaptive grid sizes and number of...
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Open AccessExploratory habitation vehicles with trim intrinsic control
Considering the space environment and its critical issues and consequent risks, the challenge is to define the way and tools with which future astronauts will be able to act, live and work in space and, in par...
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Open AccessWell-conditioned AI-assisted sub-matrix selection for numerically stable constrained form-finding of reticulated shells using geometric deep Q-learning
The selection of well-conditioned sub-matrices is a critical concern in problems across multiple disciplines, particularly those demanding robust numerical stability. This research introduces an innovative, AI...
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Open AccessAnalytical and numerical optimization of broaching tool tooth distribution
This paper presents a detailed mathematical analysis of the effect of tooth distribution on the stability of broaching operations. Analytic and numeric techniques are employed to analyse a simplified one-degre...
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Open AccessSimulation and design of isostatic thick origami structures
Thick origami structures are considered here as assemblies of polygonal panels hinged to each other along their edges according to a corresponding origami crease pattern. The determination of the internal acti...
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Open AccessA geometrically nonlinear Hellinger–Reissner shell element for the postbuckling analysis of variable stiffness composite laminate structures
Variable stiffness (VS) composite laminates provide larger freedom to design thin-walled structures than constant stiffness (CS) composite laminates. They showed to allow the redistributing of stresses, improv...
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Open AccessAnalysis of deformation in tensegrity structures with curved compressed members
Tensegrity structures are prestressed structures consisting of compressed members connected by prestressed tensioned members. Due to their properties, such as flexibility and lightness, mobile robots based on ...
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Open AccessTowards a platform-portable linear algebra backend for OpenFOAM
Graphics processing unit accelerators have become a widespread technology on modern high performance computing clusters for increasing the performance of scientific computing algorithms. Despite early efforts ...
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Open AccessAn efficient intrusive deep reinforcement learning framework for OpenFOAM
Recent advancements in artificial intelligence and deep learning offer tremendous opportunities to tackle high-dimensional and challenging problems. Particularly, deep reinforcement learning (DRL) has been sho...
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Open AccessReview of OpenFOAM applications in the computational wind engineering: from wind environment to wind structural engineering
The use of computational fluid dynamics (CFD) in the wind engineering (WE) is generally defined as computational wind engineering (CWE). Since its foundation in 2004, the use of OpenFOAM in CWE has been increa...
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Open AccessAn automated geometry generation procedure for CWE applications in OpenFOAM: the case study of a thunderstorm downburst moving over Genoa city
Since a decade, Computational Fluid Dynamics (CFD) simulations for Wind Engineering (WE) on large-scale environments became a norm. Meso- \(\gamma\) ...
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Open AccessNewton vs. Euler–Lagrange approach, or how and when beam equations are variational
There is a clear and compelling need to correctly write the equations of motion of structures in order to adequately describe their dynamics. Two routes, indeed very different from a philosophical standpoint, ...
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Open AccessOn the existence of solutions to generalized Navier–Stokes–Fourier system with dissipative heating
We consider a flow of non-Newtonian incompressible heat conducting fluids with dissipative heating. Such system can be obtained by scaling the classical Navier–Stokes–Fourier problem. As one possible singular ...
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Open AccessCrashworthiness capability comparison of a 3D Greek cross fractal structure additively manufactured with polyamide and thermoplastic polyurethane
Designers are continuously searching for materials or meta-structures, also inspired by nature, that exhibit favourable strength-to-weight ratios, substantial heat transfer capabilities, and efficient energy a...
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Open AccessModel-based deep reinforcement learning for accelerated learning from flow simulations
In recent years, deep reinforcement learning has emerged as a technique to solve closed-loop flow control problems. Employing simulation-based environments in reinforcement learning enables a priori end-to-end...
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Open AccessOn the entropy inequality and its exploitation in continuum physics
The paper deals with the statement and the application of the entropy principle, through the Clausius–Duhem inequality, in continuum physics. The conceptual role is taken from the Coleman–Noll paper of 1963 th...
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Open AccessModeling of heat conduction through rate equations
Starting from a classical thermodynamic approach, we derive rate-type equations to describe the behavior of heat flow in deformable media. Constitutive equations are defined in the material (Lagrangian) descri...
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Open AccessA variational formulation for three-dimensional linear thermoelasticity with ‘thermal inertia’
A variational model has been developed to investigate the coupled thermo-mechanical response of a three-dimensional continuum. The linear Partial Differential Equations (PDEs) of this problem are already well-...
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Open AccessExperimental and numerical mechanical characterisation of additively manufactured polymeric lattice structures under uniaxial tensile load
Additive manufacturing enables the production of lighter, more robust components with intricate features like lattice structures. However, since the mechanical behaviour of lattice structures is not fully char...
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Open AccessHybrid origami-linkage vaulted deployable structures: parametric development and form-finding
The demand for adaptable structures is steadily increasing in contemporary architectural practice. Deployable structures, characterized by their flexibility and versatility, offer innovative solutions across d...
