Journal ArticleDOI
A 3D-CFD methodology to investigate boundary layers and assess the applicability of wall functions in actual industrial problems: A focus on in-cylinder simulations
Fabio Berni,Stefano Fontanesi +1 more
TLDR
In this article, a methodology to investigate the presence of dimensionless profiles comparable to universal wall laws in boundary layers of actual industrial problems is presented, which is focused on 3D-CFD in-cylinder simulations.About:
This article is published in Applied Thermal Engineering.The article was published on 2020-06-25. It has received 26 citations till now. The article focuses on the topics: Heat flux & Reynolds-averaged Navier–Stokes equations.read more
Citations
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Towards grid-independent 3D-CFD wall-function-based heat transfer models for complex industrial flows with focus on in-cylinder simulations
TL;DR: In this paper, a modified formulation of the thermal law of the wall (T + ) is proposed to avoid overestimation of both wall shear stress and heat transfer in the viscous sub-layer.
Journal ArticleDOI
Implementation of 1D–3D integrated model for thermal prediction in internal combustion engines
TL;DR: A 1D model integrated with 3D finite elements based on a commercial software is used to calculate the heat losses in a single-cylinder gasoline direct injection engine and demonstrates that this approach is suitable to predict in a short time theHeat losses and the spatial temperature distribution in the solid regions of an internal combustion engine.
Journal ArticleDOI
Improved axial dynamic analysis of risers based on finite element method and data-driven models
Xiuquan Liu,Yanwei Li,Nan Zhang,He-Xiang Sun,Yuanjiang Chang,Guoming Chen,Liangbin Xu,Leixiang Sheng +7 more
TL;DR: In this paper, an improved axial dynamic analysis method of risers is proposed based on finite element method and data-driven models, which can accurately analyze the axial dynamics of riser systems.
Journal ArticleDOI
A Preliminary 1D-3D Analysis of the Darmstadt Research Engine Under Motored Condition
TL;DR: 1D and 3D CFD models of the Darmstadt research engine undergo a preliminary validation against the available experimental dataset at motored condition in order to adequately match the experimental mean in-cylinder pressure.
Journal ArticleDOI
A threshold soot index-based fuel surrogate formulation methodology to mimic sooting tendency of real fuels in 3D-CFD simulations
TL;DR: In this paper, a methodology is proposed to estimate sooting tendency of commercial gasolines, based on threshold Soot Index and basic composition information, as well as to formulate tailored ethanol-toluene reference fuel surrogates.
References
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Journal ArticleDOI
The numerical computation of turbulent flows
Brian Launder,D. B. Spalding +1 more
TL;DR: In this paper, the authors present a review of the applicability and applicability of numerical predictions of turbulent flow, and advocate that computational economy, range of applicability, and physical realism are best served by turbulence models in which the magnitudes of two turbulence quantities, the turbulence kinetic energy k and its dissipation rate ϵ, are calculated from transport equations solved simultaneously with those governing the mean flow behaviour.
Book
Convective Heat and Mass Transfer
W. M. Kays,J. H. Whitelaw +1 more
TL;DR: In this article, the echangeurs de : chaleur, couche de : limite, modeles de : turbulence, transfert de masse reference record created on 2005-11-18, modified on 2016-08-08
Journal ArticleDOI
Compressible turbulent channel flows: DNS results and modelling
TL;DR: In this article, direct numerical simulation (DNS) of two supersonic fully developed channel flows between very cold isothermal walls is used to provide insights into differences between conventional Reynolds and Favre averaging of the mean flow and turbulent quantities.
Journal ArticleDOI
Direct Numerical Simulation of Passive Scalar Field in a Turbulent Channel Flow
TL;DR: In this paper, a direct numerical simulation (DNS) of the fully developed thermal field in a dimensional turbulent channel flow of air was carried out, and the statistics obtained were root-mean-square temperature fluctuations, turbulent heat fluxes, turbulent Prandtl number, and dissipation time scales.
Journal ArticleDOI
The engine knock analysis – An overview
TL;DR: In this paper, the authors systematically review the engine knock phenomenon, including the mechanisms, influencing factors, consequences and detection methods, and propose some new suggestions on the weakness in the researches of knocking combustion.