液凝的3D打印:一个协同方法的风学和计算流体动力学 (CFD) 建模
Siraj Ahmad1, Hatif Alam1, Prachi Thareja1
1Department of Chemical Engineering, IIT Gandhinagar Palaj Gandhinagar 382355 India prachi@iitgn.ac.in.
RSC advances
|October 22, 2025
概括
这项研究优化了kappa-carrageenan水凝油墨用于3D打印. 添加KCl和金纳米粒子 (AuNPs) 显著提高了多层印刷稳定性和结构完整性,这对于先进的生物墨水应用至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 生物材料工程 生物材料工程
- 类风病学 类风病学 类风病学
背景情况:
- 可打印的水凝油墨对于基于挤出的3D打印至关重要.
- 优化质性质是成功打印和结构完整性的关键.
研究的目的:
- 系统地研究使用KCl和金纳米粒子 (AuNPs) 的卡帕-卡拉基 (κCG) 水凝油墨.
- 评估这些添加剂对3D打印应用的可打印性,流动行为和结构性能的影响.
主要方法:
- 使用功率定律模型和应力扫描测试对剪切稀释行为的表征.
- 对单层和多层打印能力的评估.
- 计算流体动力学 (CFD) 模拟用于挤出压力和剪切速率分析.
- 福利埃变换红外光谱 (FTIR),X射线衍射 (XRD),热分析和场发射扫描电子显微镜 (FESEM) 用于材料验证.
主要成果:
- 所有配方都表现出剪切稀释行为.
- 没有KCl的油墨表现出良好的单层稳定性,但多层稳定性较差.
- 通过KCl交联的油墨显示出增强的机械稳定性和多层结构保留.
- 有KCl和AuNPs的墨水实现了最佳的多层印刷性能.
- 在CFD模拟的基础上,修改了类固醇协议.
结论:
- 一个集成的实验CFD框架提供了对水凝墨水行为的预测洞察力.
- 配方,流量特性和打印性能是相互关联的.
- 用KCl和AuNPs优化 κCG水凝油墨为组织工程和软材料应用中下一代生物油墨提供了基础.
相关概念视频
01:12Modeling and Similitude
Scaled modeling is a fundamental technique in engineering, enabling the study of large and complex systems by creating smaller, manageable replicas that recreate critical characteristics of the original. In hydrology and civil infrastructure, for example, scaled models of dams help analyze water flow, turbulence, and pressure. This method allows for accurate predictions of real-world behavior within a controlled environment, significantly reducing the cost and time involved in full-scale...
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.