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The aim of this work is to propose a fast and reliable algorithm for computing
integrals of the type
$$\int_{-\infty}^{\infty} f(x) e^{\scriptstyle -x^2 -\frac{\scriptstyle 1}{\scriptstyle x^2}} dx,$$
where $f(x)$ is a sufficiently smooth function, in floating point arithmetic.
The algorithm… |
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We simulate the two-dimensional fluid flow around National Advisory Committee for Aeronautics (NACA) 0012 airfoil using a hybrid lattice Boltzmann method (HLBM), which combines the standard lattice Boltzmann method with an unstructured finite-volume formulation. The aim of the study is to assess… |
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The simulations of the flow around a high-speed vessel in both catamaran and monohull configurations are carried out by the numerical solution of the Reynold averaged NavierStokes (RANS) equations. The goal of the analysis is the investigation of the interference phenomena between the two hulls,… |
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We propose a thermal lattice Boltzmann model to study gaseous flow in microcavities. The model relies on the use of a finite difference scheme to solve the set of evolution equations. By adopting diffuse reflection boundary conditions to deal with flows in the slip regime, we study the micro-… |
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We prove the strong ill-posedness of the two-dimensional Boussinesq system in vorticity form in L8pR2q
without boundary, building upon the method that Shikh Khalil & Elgindi arXiv:2207.04556v1 developed for scalar
equations. We provide examples of initial data with vorticity and density… |
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Very high resolution precipitable water vapor maps obtained by the Sentinel-1 A synthetic aperture radar (SAR), using the SAR interferometry (InSAR) technique, are here shown to have a positive impact on the performance of severe weather forecasts. A case study of deep convection which affected the… |
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We perform a multiple time scale, single space scale analysis of a compressible
fluid in a time-dependent domain, when the time variations of the boundary
are small with respect to the acoustic velocity.
We introduce an average operator with respect to the fast time.
The averaged leading order… |
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We investigate numerically, by a hybrid lattice Boltzmann method, the morphology and the dynamics of an emulsion made of a polar active gel, contractile or extensile, and an isotropic passive fluid. We focus on the case of a highly off-symmetric ratio between the active and passive components. In… |
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Il lavoro presenta dei lower bound sul numero cromatico di un grafo con pesi sui nodi. |
