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arXiv 2210.09199cond-mat.soft
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活性极性流体中的有序化动力学

Ordering kinetics in active polar fluid

Shambhavi Dikshit, Shradha Mishra

AI总结:

该研究将活性极性流体建模为带活性应力与黏性动量阻尼的可取向物体集合,探究不同活性下的取向场生长动力学,发现活性以特定方式调控畴生长且系统保持动态标度,为活性极性凝胶有序化动力学提供理解。

摘要:

我们将活性极性流体建模为一组可取向的物体,这些物体具备活性应力,且会受到来自本体流体介质黏度的动量阻尼作用。本文研究了局域取向场的生长动力学。活性流体的作用是收缩型还是伸长型,取决于活性应力的符号。我们探究了不同活性强度下的生长动力学。我们观察到,与平衡态Model A相比,伸长型和收缩型情形下的生长都会因一个前置因子而发生改变。我们发现,伸长型流体会促进畴生长,而收缩型流体会抑制畴生长。当活性强度较大时,渐近生长表现为纯代数形式。我们还发现,畴的形貌不会因活性而改变,且系统在所有活性强度下都表现出良好的动态标度性。本研究为理解活性极性凝胶中的有序化动力学提供了依据。

英文摘要:

We model the active polar fluid as a collection of orientable objects supplied with active stresses and momentum damping coming from the viscosity of bulk fluid medium. The growth kinetics of local orientation field is studied. The effect of active fluid is contractile or extensile depending upon the sign of the active stress. We explore the growth kinetics for different activities. We observe that for both extensile and contractile cases the growth is altered by a prefactor when compared to the equilibrium Model A. We find that the extensile fluid enhances the domain growth whereas the contractile fluid supresses it. The asymptotic growth becomes pure algebraic for large magnitudes of activity. We also find that the domain morphology remains unchanged due to activity and system shows the good dynamic scaling for all activities. Our study provides the understanding of ordering kinetics in active polar gel.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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