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首页> 外文期刊>Computer Methods in Applied Mechanics and Engineering >Decoupled approach for the problem of viscoelastic fluid flow of PTT model I: continuous stresses
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Decoupled approach for the problem of viscoelastic fluid flow of PTT model I: continuous stresses

机译:PTT模型I的粘弹性流体流动问题的解耦方法:连续应力

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We present in this work a numerical analysis of a decoupled approach with continuous stresses for the viscoelastic fluid flows obeying the PTT model. The Streamline Upwind Petrov-Galerkin is used to treat the transport part of the equations. This model introduces supplementary difficulties linked to the non-linearities of the exponential type present in the constitutive equation. In ex- change, it seems to be more realistic and gives best numerical results. The method is tested on the classical benchmark problem: Stick- Slip flow. Numerical results show that our method is remarkably stable and no upper Weissenberg limit number was encountered for reasonable values of ∈, a material-depending parameter.
机译:我们在这项工作中对采用PTT模型的粘弹性流体流具有连续应力的解耦方法进行了数值分析。流线逆风Petrov-Galerkin用于处理方程式的输运部分。该模型引入了与本构方程中存在的指数类型非线性相关的补充困难。换而言之,它似乎更为现实,并提供了最佳的数值结果。该方法在经典基准问题上进行了测试:粘滑流。数值结果表明,我们的方法非常稳定,对于与材料相关的参数ε的合理值,未遇到魏森伯格上限上限。

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