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An Effective 3D-CFD Methodology for the Complementary Virtual Development of Alternative Fuels and Engine Concepts

同济大学学报（自然科学版） 2024年第S01期52卷 1-8页

作者： Robin SCHMELCHER Thomas gal Mario PIPOLO Cristian TORTORELLA Antonino VACCA Edoardo ROSSI Francesco CUPO marco CHIODI AndréCASAL KULZER Institute of Automotive Engineering(IFS) University of Stuttgart70569 StuttgartGermany Research Institute for Automotive Engineering and Powertrain Systems Stuttgart(FKFS) 70569 StuttgartGermany

With the aim of reducing the cost of developing internal combustion engines,while at the same time investigating different geometries,layouts and fuels,3D-CFD-CHT simulations represent an indispensable part for the development of new *** tools are increasingly used by manufacturers,as a screening process before building the first *** paper presents an innovative methodology for virtual engine *** 3D-CFD tool QuickSim,developed at FKFS,allows both a significant reduction in computation time and an extension of the simulated domain for complete engine *** is possible thanks to a combination of coarse meshes and self-developed internal combustion engine models,which simultaneously ensure high *** present work demonstrates the capabilities of this innovative methodology for the design and optimization of different engines and fuels with the goal of achieving the highest possible combustion efficiencies and pollutant *** analysis focuses on the influence of different fuels such as hydrogen,methanol,synthetic gasolines and methane on different engine geometries,in combination with suitable injection and ignition systems,including passive and active *** operations as well as knock reduction are discussed,particularly for methane and hydrogen ***,it is shown how depending on the chosen fuel,an appropriate ad-hoc engine layout can be designed to increase the indicated efficiency of the respective engines.

关键词： eFuels methane methanol hydrogen CO_(2)reduction virtual development 3D-CFD

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Optimal photonic indistinguishability tests in multimode networks

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Science Bulletin 2018年第22期63卷 1470-1478页

作者： Niko Viggianiello Fulvio Flamini marco Bentivegna Nicolò Spagnolo Andrea Crespi Daniel J.Brod Ernesto F.galvao Roberto Osellame Fabio Sciarrino Dipartimento di Fisica Sapienza Universitadi RomoPiazzale Aldo Moro 51-00185RomaItaly Istituto di Fotonica e Nanotecnologie Consiglio Nazionale delle Ricerche (IFN-CNR)Piazza Leonardo da Vinci321-20133 MilanoItaly Diportimento di Fisica Politecnico di MilanoPiazza Leonardo da Vinci321-20133 MilanoItaly Perimeter Institute for Theoretical Physics 31 Caroline Street NorthWaterlooON N2L 2Y5Canada Instituto de Pisica Universidade Federal FluminenseAv.Gal.Milton Tavares de Souza s/nNiteroiRJ 24210-340Brazil

Particle indistinguishability is at the heart of quantum statistics that regulates fundamental phenomena such as the electronic band structure of solids, Bose-Einstein condensation and ***, it is necessary in practical applications such as linear optical quantum computation and simulation, in particular for Boson Sampling *** is thus crucial to develop tools to certify genuine multiphoton interference between multiple *** approach employs the total variation distance to find those transformations that minimize the error probability in discriminating the behaviors of distinguishable and indistinguishable *** particular, we show that so-called Sylvester interferometers are near-optimal for this *** using Bayesian tests and inference, we numerically show that Sylvester transformations largely outperform most Haar-random unitaries in terms of sample size ***, we experimentally demonstrate the efficacy of the transformation using an efficient 3 D integrated circuits in the single-and multiple-source *** then discuss the extension of this approach to a larger number of photons and *** results open the way to the application of Sylvester interferometers for optimal assessment of multiphoton interference experiments.

关键词： Particle indistinguishability Quantum statistics Optical quantum computation Quantum simulation Sylvester interferometers Bayesian tests Multiphoton interference experiments

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