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A comparative RANS/LES study of transient gas jets and sprays under diesel conditions

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A comparative RANS/LES study of transient gas jets and sprays under diesel conditions. / Valentino, Mariafrancesca; Jiang, Xi; Zhao, Hua.

In: Atomization and Sprays, Vol. 17, No. 5, 2007, p. 451-472.

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Valentino, Mariafrancesca ; Jiang, Xi ; Zhao, Hua. / A comparative RANS/LES study of transient gas jets and sprays under diesel conditions. In: Atomization and Sprays. 2007 ; Vol. 17, No. 5. pp. 451-472.

Bibtex

@article{87faa6fac90a405c9e74076598082bd1,
title = "A comparative RANS/LES study of transient gas jets and sprays under diesel conditions",
abstract = "This study aimed at a better understanding of the transient nature of axisymmetric gas jets and sprays under diesel conditions. To evaluate the performances of the Reynolds-averaged Navier-Stokes (RANS) and the large eddy simulation (LES) modeling approaches, a comparative computational study using both methodologies has been performed for the same computational cases with the same numerical algorithm and spatial resolution. The results show that LES is capable of capturing the unsteady features of transient gas jets and sprays such as flow vortical structures, whereas RANS is incapable of resolving these features. Furthermore, the excessive dissipation in the RANS simulation can lead to underprediction of the jet penetration, while LES can better represent the jet mixing and entrainment, which offers a promising tool for numerical prediction of transient jets and sprays.",
keywords = "LIQUID PENETRATION, ENGINE, MODELS",
author = "Mariafrancesca Valentino and Xi Jiang and Hua Zhao",
year = "2007",
doi = "10.1615/AtomizSpr.v17.i5",
language = "English",
volume = "17",
pages = "451--472",
journal = "Atomization and Sprays",
issn = "1044-5110",
publisher = "Begell House Inc.",
number = "5",

}

RIS

TY - JOUR

T1 - A comparative RANS/LES study of transient gas jets and sprays under diesel conditions

AU - Valentino, Mariafrancesca

AU - Jiang, Xi

AU - Zhao, Hua

PY - 2007

Y1 - 2007

N2 - This study aimed at a better understanding of the transient nature of axisymmetric gas jets and sprays under diesel conditions. To evaluate the performances of the Reynolds-averaged Navier-Stokes (RANS) and the large eddy simulation (LES) modeling approaches, a comparative computational study using both methodologies has been performed for the same computational cases with the same numerical algorithm and spatial resolution. The results show that LES is capable of capturing the unsteady features of transient gas jets and sprays such as flow vortical structures, whereas RANS is incapable of resolving these features. Furthermore, the excessive dissipation in the RANS simulation can lead to underprediction of the jet penetration, while LES can better represent the jet mixing and entrainment, which offers a promising tool for numerical prediction of transient jets and sprays.

AB - This study aimed at a better understanding of the transient nature of axisymmetric gas jets and sprays under diesel conditions. To evaluate the performances of the Reynolds-averaged Navier-Stokes (RANS) and the large eddy simulation (LES) modeling approaches, a comparative computational study using both methodologies has been performed for the same computational cases with the same numerical algorithm and spatial resolution. The results show that LES is capable of capturing the unsteady features of transient gas jets and sprays such as flow vortical structures, whereas RANS is incapable of resolving these features. Furthermore, the excessive dissipation in the RANS simulation can lead to underprediction of the jet penetration, while LES can better represent the jet mixing and entrainment, which offers a promising tool for numerical prediction of transient jets and sprays.

KW - LIQUID PENETRATION

KW - ENGINE

KW - MODELS

U2 - 10.1615/AtomizSpr.v17.i5

DO - 10.1615/AtomizSpr.v17.i5

M3 - Journal article

VL - 17

SP - 451

EP - 472

JO - Atomization and Sprays

JF - Atomization and Sprays

SN - 1044-5110

IS - 5

ER -