Thermodynamically consistent fluid particle model for viscoelastic flows.
Thermodynamically consistent fluid particle model for viscoelastic flows.
复制标题
粘弹性流的热力学一致流体粒子模型。
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
E. Flekkøy
中科院分区：
文献类型：
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作者：
M. Ellero;P. Español;E. Flekkøy
将最近提出的粘弹性耗散粒子动力学模型转化为热力学一致的形式，考虑了非等温情况。该模型由具有附加弹性矢量的流体颗粒组成，该弹性矢量描述了流体颗粒内分子的伸长状态。对于弹性矢量的动力学，提出了非常简单的物理机制，借助于一般形式，我们可以推导出该模型的全套动力学方程。该模型被进一步推广到包括聚合物扩散。讨论了该模型与CONNFFESSIT方法和布朗配位场方法的联系。
A recently proposed viscoelastic dissipative particle dynamics model is put into a thermodynamically consistent form that allows for nonisothermal situations. This model consists of fluid particles that have an additional elastic vector characterizing the state of elongation of the molecules within the fluid particle. Very simple physical mechanisms are proposed for the dynamics of the elastic vector that, with the help of the GENERIC formalism, allows us to derive the full set of dynamic equations for the model. The model is further generalized to include polymer diffusion. The connection of the present model with the CONNFFESSIT approach and the Brownian configuration field approach is discussed.