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计算流体动力学上下数字光处理的建模 增材制造 增材制造
Hesam Moghadasi1,2, Md Tusher Mollah2, Deepak Marla3
1School of Mechanical Engineering, Iran University of Science and Technology (IUST), Narmak, Tehran 16846-13114, Iran.
Polymers
|June 10, 2023
概括
计算流体动力学 (CFD) 模拟优化数字光处理 (DLP) 3D打印. 像粘度和速度这样的关键参数影响打印稳定性,指导最佳过程选择以获得准确性.
科学领域:
- 添加剂制造 添加剂制造 添加剂制造
- 流体动力学 流体动力学
- 聚合物科学 聚合物科学
背景情况:
- 数字光处理 (DLP) 是一种使用可光固化树脂的流行的3D打印方法.
- 在DLP中,零件的精度取决于工艺参数和树脂特性.
- 了解流体行为对于优化DLP打印至关重要.
研究的目的:
- 研究过程参数对上下DLP3D打印中流体接口稳定性的影响.
- 开发一个计算流体动力学 (CFD) 模型来模拟DLP打印.
- 确定最佳参数,以提高印刷精度和稳定性.
主要方法:
- 利用计算流体动力学 (CFD) 模拟用于上下DLP3D打印.
- 分析了粘度,行驶速度,行驶速度比 (TSR),层厚度和行驶距离的影响.
- 评估了13个不同的模拟案例以确定流体接口稳定时间.
主要成果:
- 较高的流体粘度增加了稳定时间.
- 增加的行驶速度比 (TSR) 降低了稳定时间,虽然比粘度少得多.
- 增加印刷层厚度和旅行距离会减少稳定时间.
结论:
- 最佳的过程参数选择对于实用和准确的DLP3D打印至关重要.
- 开发的数值模型有助于优化DLP过程参数.
- CFD模拟为DLP打印的复杂流体动力学提供了宝贵的见解.
相关概念视频
01:30Typical Model Studies
Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
01:21Design Example: Creating a Hydraulic Model of a Dam Spillway
Scaled hydraulic models of dam spillways provide a practical way to replicate and study the intricate flow dynamics of these structures. Often built to a 1:15 ratio, these models allow for observing critical water behavior, such as velocity distribution, flow patterns, and energy dissipation.