Dynamic interface for three-dimensional transient laser ablation polymer microchannels

被引：0

作者：

Mechanical Engineering Department, Micro-System Research and Development Center, Zhejiang University, Hangzhou 310027, China ^{[1
]}

机构：

来源：

Zhejiang Daxue Xuebao (Gongxue Ban) | 2007年 / 11卷 / 1908-1911期

关键词：

Ablation interface - CO<inf>2</inf> laser machining - Finite element - Micro fluidic chip;

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摘要：

Based on the machining principle of CO2 laser direct-writing polymer microfluidic chip, as well as the theory of heat conduction and energy conservation, a three-dimensional transient laser ablation model was built to predict the groove shape and ablation front temperature field in the thermal process. A finite element matrix equation was built by finite element method and Galerkin transformation. Element birth and death technology and high precision numerical arithmetic were applied to model the material removal in the ablation process. Then the three-dimensional transient dynamic ablation interface and the temperature field varying with time and space were obtained. Several numerical results at different time point were presented using polydimethylsiloxane (PMMA) as an example. Agreement of the simulated results of groove depth with the experimental data validated the effectiveness of the proposed method for predicting the groove contour and temperature field.

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