包能胜,马婉,黄学佳.牛顿流体两辊间隙施涂过程的理论建模与分析[J].包装工程,2017,38(1):31-36.
BAO Neng-sheng,MA Wan,HUANG Xue-jia.Theoretical Modeling and Analysis of the Coating Process between Two Rollers of Newtonian Fluid[J].Packaging Engineering,2017,38(1):31-36. |
| 牛顿流体两辊间隙施涂过程的理论建模与分析 |
| Theoretical Modeling and Analysis of the Coating Process between Two Rollers of Newtonian Fluid |
| 投稿时间：2016-08-05 修订日期：2017-01-10 |
| DOI： |
| 中文关键词: 牛顿流体 辊式涂布 两辊间隙 施涂过程 理论建模 涂膜厚度 CFD |
| 英文关键词: Newtonian fluid roll coating gap between two rollers coating process theoretical modeling coatingthickness CFD |
| 基金项目:国家自然科学基金（51275281）；广东省教育厅项目（2013CXZDC009）；汕头大学基金（2014KZDXM035） |
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| 中文摘要: |
| 目的 通过理论建模分析涂膜厚度的成型机理，从而实现对涂膜厚度的精确控制。方法 针对牛顿流体在五辊涂布系统存胶辊与计量辊之间微间隙处的流动过程，在机理分析与适当假设的基础上，建立流体流动的数学模型，推导出涂膜厚度与其影响因子之间的关系方程，并分析影响液膜厚度的关键因子。应用CFD软件对流体的流动过程进行数值仿真，通过仿真流场对理论模型与理论推导的边界条件及结果的合理性进行分析。结果 表明理论模型与仿真流场一致，理论结果与仿真结果吻合度较高，该理论建模具有相当的合理性。理论结果表明，影响涂膜厚度的因素有涂液粘度和表面张力、计量辊转速、辊径以及辊间间隙，它们与涂膜厚度之间存在较复杂的关系方程。结论 有助于在工程实际中快速找到获得理想涂膜厚度的有效工艺参数。 |
| 英文摘要: |
| The work aims to build theoretical modeling to analyze the forming mechanism of coating thickness, so as to accurately control the coating thickness. Based on mechanism analysis and appropriate assumptions, the mathematical model of the flow process of Newtonian fluid at the micro gap between storage roller and metering roller of five-roll coater was established. The relational equation of coating thickness and its influencing factors was derived, and the key factorsthat affected the liquid film thickness were analyzed accordingly. A numerical simulation of flow process was carried out with CFD software. The rationality of boundary conditions and results derived from theoretical modeling and theories was analyzed through simulation flow field. The results showed that the theoretical modeling was consistent with the simulation flow field. The theoretical results and the simulation results were of higher goodness of fit. Therefore, such theoretical modeling was probably very reasonable. The theoretical results showed that the factors affecting coating thickness were coating liquid viscosity and surface tension, metering roll speed, roller diameter and gap between rollers. These factors and the coating thickness had quite complicated relation equitation. The research results help to find the most appropriate process parameters rapidly to obtain ideal film thickness in engineering practices. |
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