Fluid Dynamics - understanding fluid dynamics to improve our lives

流体动力学 - 了解流体动力学以改善我们的生活

• 批准号: 2882596
• 金额: --
• 依托单位: University of Leeds
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2882596
• 关键词: Fluid; Dynamics; understanding; fluid; dynamics

This project aims to enhance the quality of 3D-printed objects by investigating the fluid dynamics of non-Newtonian fluids during the printing process. The properties of these fluids change throughout the printing process due to their transient non-linear rheology.By studying the properties of these materials, yield stress, thixotropy, and shear thinning behaviour, we aim to improve the quality of printed objects.For example, a paste with high-yield stress will prevent dripping from the nozzle and allow for the construction of tall objects before slumping occurs. Shear thinning behaviour enables the material to be extruded more efficiently, while thixotropy helps the material quickly regain high viscosity, preventing immediate slumping and maintaining its shape.This project will integrate theoretical models of constitutive laws into the open-source software OpenFOAM to simulate the flow. Initially, the simulations will be implemented in 2D to study how the complex fluid is extruded from the nozzle. The study will then extend to 3D simulations to model the slumping effects of the material. A detailed understanding of material rheology will allow for the development of material-specific protocols to achieve higher-quality final products.

该项目旨在通过研究打印过程中非牛顿流体的流体动力学来提高3D打印物体的质量。由于这些流体的瞬态非线性流变性，它们的特性在整个打印过程中会发生变化。通过研究这些材料的特性，屈服应力，触变性和剪切变稀行为，我们的目标是提高打印物体的质量。例如，具有高屈服应力的浆料将防止从喷嘴滴落，并允许在坍塌发生之前构建高物体。剪切变稀特性使材料能够更有效地挤出，而触变性有助于材料迅速恢复高粘度，防止立即坍塌并保持其形状。该项目将本构关系的理论模型集成到开源软件OpenFOAM中，以模拟流动。最初，模拟将在2D中实施，以研究复杂流体如何从喷嘴中挤出。然后，该研究将扩展到3D模拟，以模拟材料的坍塌效应。对材料流变学的详细了解将有助于开发特定材料的协议，以实现更高质量的最终产品。