| Valveless Thermally-Driven Phase-Change Micropump |
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| 作者姓名： | 王沫然 李志信 |
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| 作者单位： | DepartmentofEngineeringMechanics,TsinghuaUniversity,Beijing100084,China |
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| 基金项目： | SupportedbytheNationalNaturalScienceFoundationofChina(No.59995550-2)
NationalKeyBasicResearchandDevelopment(973)ProgramofChina(No.G1999033106) |
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| 摘 要： | A dynamic model with moving heat sources was developed to analyze the pumping mechanism of a valveless thermally-driven phase-change micropump. The coupled equations were solved to determine the pumping characteristics. The numerical results agree with experimental data from micropumps with different diameter microtubes. The maximum flow rate reached 33 μL / min and the maximum pump pressure was over 20 kPa for a 200-μm diameter microtube. Analysis of the pumping mechanism shows that the main factors affecting the flow come from the large density difference between the liquid and vapor phases and the choking effect of the vapor region.
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| 关 键 词： | 微型泵 无阀式热驱动 相转变 泵浦机制 动力学模型 |
Valveless Thermally-Driven Phase-Change Micropump |
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| WANG Moran,LI Zhixin.Valveless Thermally-Driven Phase-Change Micropump[J].Tsinghua Science and Technology,2004,9(6):688-693. |
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| Authors: | WANG Moran LI Zhixin |
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| Institution: | WANG Moran,LI ZhixinDepartment of Engineering Mechanics,Tsinghua University,Beijing 100084,China |
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| Abstract: | |
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| Keywords: | valveless micropump phase change pumping mechanism |
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