2022, Articolo in rivista, ENG
Durve, Mihir; Tiribocchi, Andriano; Montessori, Andrea; Lauricella, Marco; Succi, Sauro
This work analyzes trajectories obtained by YOLO and DeepSORT algorithms of dense emulsion systems simulated via lattice Boltzmann methods. The results indicate that the individual droplet's moving direction is influenced more by the droplets immediately behind it than the droplets in front of it. The analysis also provide hints on constraints of a dynamical model of droplets for the dense emulsion in narrow channels.
2013, Articolo in rivista, ENG
Biferale, Luca and Mantovani, Filippo and Pivanti, Marcello and Pozzati, Fabio and Sbragaglia, Mauro and Scagliarini, Andrea and Schifano, Sebastiano Fabio and Toschi, Federico and Tripiccione, Raffaele
We describe the implementation of a thermal compressible Lattice Boltzmann algorithm on an NVIDIA Tesla C2050 system based on the Fermi GP-GPU. We consider two different versions, including and not including reactive effects. We describe the overall organization of the algorithm and give details on its implementations. Efficiency ranges from 25% to 31% of the double precision peak performance of the GP-GPU. We compare our results with a different implementation of the same algorithm, developed and optimized for many-core Intel Westmere CPUs. (C) 2012 Elsevier Ltd. All rights reserved.
2012, Contributo in atti di convegno, ENG
Biferale, Luca and Mantovani, Filippo and Pivanti, Marcello and Pozzati, Fabio and Sbragaglia, Mauro and Scagliarini, Andrea and Schifano, Sebastiano Fabio and Toschi, Federico and Tripiccione, Raffaele
We describe a parallel implementation of a compressible Lattice Boltzmann code on a multi-GPU cluster based on Nvidia Fermi processors. We analyze how to optimize the algorithm for GP-GPU architectures, describe the implementation choices that we have adopted and compare our performance results with an implementation optimized for latest generation multi-core CPUs. Our program runs at approximate to 30% of the double-precision peak performance of one GPU and shows almost linear scaling when run on the multi-GPU cluster.
2009, Articolo in rivista, ENG
Fyta, Maria; Fyta, Maria; Melchionna, Simone; Melchionna, Simone; Bernaschi, Massimo; Kaxiras, Efthimios; Kaxiras, Efthimios; Succi, Sauro; Succi, Sauro
Numerical results on the translocation of long biopolymers through mid-sized and wide pores are presented. The simulations are based on a novel methodology which couples molecular motion to a mesoscopic fluid solvent. Thousands of events of long polymers (up to 8000 monomers) are monitored as they pass through nanopores. Comparison between the different pore sizes shows that wide pores can host a larger number of multiple biopolymer segments, as compared to smaller pores. The simulations provide clear evidence of folding quantization in the translocation process as the biopolymers undertake multi-folded configurations, characterized by a well-defined integer number of folds. Accordingly, the translocation time is no longer represented by a single-exponent power-law dependence on the length, as is the case for single-file translocation through narrow pores. The folding quantization increases with the biopolymer length, while the rate of translocated beads at each time step is linearly correlated with the number of resident beads in the pore. Finally, analysis of the statistics over the translocation work unravels the importance of the hydrodynamic interactions in the process. © 2009 IOP Publishing Ltd.