论文标题
用于粘弹性流的可扩展的晶格玻尔兹曼方法：Oldroyd-B流体中的复杂和移动边界
An extensible lattice Boltzmann method for viscoelastic flows: complex and moving boundaries in Oldroyd-B fluids
论文作者
论文摘要
大多数生物流体都是粘弹性的，这意味着除了在牛顿流体中发现的耗散特性外，它们具有弹性特性。计算模型可以帮助我们了解粘弹性流，但通常会限制它们处理复杂的流量几何形状和悬浮颗粒的方式。在这里，我们为Oldroyd-B流体提供了一个晶格Boltzmann求解器，该求解器可以处理任意形状的固定和移动边界条件，这使其非常适合模拟受限的胶体悬架。我们使用几种标准的流变学设置来验证我们的方法，并研究单个沉积胶体，也与文献相处得很好。我们的方法很容易扩展到Oldroyd-B以外的其他方程式。这种灵活性和复杂边界的处理有望研究粘弹性流体中的微晶状体。
Most biological fluids are viscoelastic, meaning that they have elastic properties in addition to the dissipative properties found in Newtonian fluids. Computational models can help us understand viscoelastic flow, but are often limited in how they deal with complex flow geometries and suspended particles. Here, we present a lattice Boltzmann solver for Oldroyd-B fluids that can handle arbitrarily-shaped fixed and moving boundary conditions, which makes it ideally suited for the simulation of confined colloidal suspensions. We validate our method using several standard rheological setups, and additionally study a single sedimenting colloid, also finding good agreement with literature. Our approach can readily be extended to constitutive equations other than Oldroyd-B. This flexibility and the handling of complex boundaries holds promise for the study of microswimmers in viscoelastic fluids.
