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首页> 外文期刊>Journal of ocean engineering and marine energy >Modification of k-omega turbulence model for ship resistance flow predictions
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Modification of k-omega turbulence model for ship resistance flow predictions

机译：k-omega湍流模型的修正及其对船舶阻力流的预测

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CFD analysis has become an essential tool in ship hydrodynamics both for practical design applications and for engineering researches. However, although much efforts are being devoted to the development of turbulence modeling, universal turbulence models which can be applied to a wide class of flows are not yet established. Particularly, ship flows are characterized as turbulent flows with separation around complex geometry and this makes the modeling even more difficult. In the current ship flow simulations, the turbulence model must be carefully selected from the experiences and the optimal model varies case by case. Recently, a new concept is proposed for expanding flexibility and applicability of a RANS turbulence model. This approach called GEKO (GEneralized K-Omega) applies a modification to the existing k-omega SST model by adding free parameters to control the various properties, such as separation, curvature correction, near wall treatment, and so on. Inspired by this approach, the parameter tuning of the SST model is attempted in the present study to improve the prediction capability of the k-omega turbulence model for ship resistance flow applications.
机译：船舶CFD分析已经成为一个必不可少的工具流体力学在实际设计应用程序和工程研究。然而,尽管被投入多少努力湍流模型的发展,普遍的湍流模型可应用类繁多的流动尚未建立。特别是,船流特征复杂的湍流流动与分离几何,这使得建模更加困难。湍流模型必须精心挑选从经验和最优模型不同通过案件。为扩大的灵活性和适用性了湍流模型。(广义K-Omega)适用于修改现有k-omega SST模型通过添加自由参数控制的各种属性,如分离、曲率修正,近了墙处理,等等。方法,对海温的参数优化模型本研究试图在改善k-omega动荡的预测能力船舶阻力流应用程序模型。

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