Author
Wei Gong
Other affiliations: Dynex Semiconductor, Beihang University
Bio: Wei Gong is an academic researcher from University of Nottingham. The author has contributed to research in topics: Lattice Boltzmann methods & Wetting. The author has an hindex of 9, co-authored 13 publications receiving 181 citations. Previous affiliations of Wei Gong include Dynex Semiconductor & Beihang University.
Papers
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TL;DR: In this paper, the relationship between fuel compositions and particulate matter (PM) emissions originating from a gasoline direct injection (GDI) engine was explored and used to identify optimal fuel composition for minimizing the number concentrations of both nucleation mode and accumulation mode PM via a predictive PM model developed by using optimum mixture design DoE (Design of Experiments).
52 citations
TL;DR: In this article, a new lattice Boltzmann (LB) approach was developed to overcome the difficulty of conjugate problems on fluid-porous interfaces, which is validated by three benchmark tests.
33 citations
TL;DR: In this paper, the free energy curves based on the transition processes are presented and discussed in detail, the existence of energy barriers with or without consideration of the gravity effect, and the irreversibility of wetting transition are discussed based on presented energy curves.
Abstract: Due to the property of water repellence, biomimetic superhydrophobic surfaces have been widely applied to green technologies, in turn inducing wider and deeper investigations on superhydrophobic surfaces. Theoretical, experimental and numerical studies on wetting transitions have been carried out by researchers, but the mechanism of wetting transitions between Cassie-Baxter state and Wenzel state, which is crucial to develop a stable superhydrophobic surface, is still not fully understood. In this paper, the free energy curves based on the transition processes are presented and discussed in detail. The existence of energy barriers with or without consideration of the gravity effect, and the irreversibility of wetting transition are discussed based on the presented energy curves. The energy curves show that different routes of the Cassie-to-Wenzel transition and the reverse transition are the main reason for the irreversibility. Numerical simulations are implemented via a phase field lattice Boltzmann method of large density ratio, and the simulation results show good consistency with the theoretical analysis.
33 citations
TL;DR: In this article, a lattice Boltzmann (LB) model is proposed for conjugated heat transfer research, which does not require any specific treatment dependent on interface topology and independent from the choice of lattice model.
31 citations
TL;DR: Li et al. as discussed by the authors proposed a new pseudopotential multiphase model for liquid-vapour phase change based on the lattice Boltzmann (LB) model.
16 citations
Cited by
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TL;DR: A comprehensive review of the lattice Boltzmann (LB) method for single-phase and solid-liquid phase-change heat transfer in porous media at both the pore scale and representative elementary volume (REV) scale is presented in this paper.
155 citations
TL;DR: The first phase of the ECE 15 cycle (representing the urban driving condition) within the NEDC was examined to evaluate the cold start effect on particulate matter (PM) emissions as mentioned in this paper.
151 citations
TL;DR: In this article, the authors summarized the current state of research in GDI PN emissions (engine-out) including a discussion of PN formation, and the characteristics of particle number emissions from GDI engines.
Abstract: Particulate Matter (PM) emissions from gasoline direct injection (GDI) engines, particularly Particle Number (PN) emissions, have been studied intensively in both academia and industry because of the adverse effects of ultrafine PM emissions on human health and other environmental concerns. GDI engines are known to emit a higher number of PN emissions (on an engine-out basis) than Port Fuel Injection (PFI) engines, due to the reduced mixture homogeneity in GDI engines. Euro 6 emission standards have been introduced in Europe (and similarly in China) to limit PN emissions from GDI engines. This article summarises the current state of research in GDI PN emissions (engine-out) including a discussion of PN formation, and the characteristics of PN emissions from GDI engines. The effect of key GDI engine operating parameters is analysed, including air-fuel ratio, ignition and injection timing, injection pressure, and EGR; in addition the effect of fuel composition on particulate emissions is explored, including the effect of oxygenate components such as ethanol.
145 citations
TL;DR: In this article, a comprehensive review on the latest research progress, including the particulate matter formation mechanism of gasoline engines, effects of fuel/air mixture preparation strategies, fuel physical-chemical properties, and engine operating conditions on particulate size distribution characteristics, and the effects of the driving cycle on vehicle particulate emissions were summarized.
108 citations
TL;DR: In this article, a mixture design approach was adopted to formulate the correlation between the cementitious material components and material rheological properties and identify the optimal material composition to get a balance between high yield stress and low dynamic yield stress.
95 citations