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首页> 外文期刊>International Journal of Heat and Mass Transfer >Single-point transition modeling using the laminar kinetic energy concept
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Single-point transition modeling using the laminar kinetic energy concept

机译：使用层流动能概念的单点过渡建模

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摘要

This work investigates transition to turbulence using laminar kinetic energy modeling based in single-point RANS approach. Transport equations are discretized using the cell centered control-volume method and the system of algebraic equations is relaxed using SIMPLE algorithm. A modified version of the most known laminar kinetic energy model is proposed and compared with the original version and with an experimental correlation transition model. The numerical results show that the laminar kinetic energy approach has reasonable experimental correlation. The modified version presents improvements in prediction of skin friction coefficient in flows subjected to pressure gradients. However, the use of the laminar kinetic energy concept has shown weakness when dealing with detached induced transition. Probably the cause of that is the lack of physical modeling of this phenomenon. Laminar kinetic energy modeling is in continuous evolution and is a good alternative to deal with engineering simulation that needs a good prediction of wall shear stress in transitional flows.
机译：这项工作使用基于单点RANS方法的层流动能模型研究了湍流的过渡。使用单元中心控制量法离散化了输运方程，并使用SIMPLE算法放宽了代数方程组。提出了最著名的层流动能模型的修改版本，并将其与原始版本和实验相关转换模型进行了比较。数值结果表明，层流动能方法具有合理的实验相关性。修改后的版本在压力梯度作用下的流动中皮肤摩擦系数的预测方面有所改进。但是，层流动能概念的使用在处理分离的诱导跃迁时显示出弱点。可能的原因是这种现象缺乏物理建模。层流动能建模处于持续发展中，是处理需要对过渡流壁剪应力进行良好预测的工程仿真的良好替代方案。

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