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微流控?zé)o閥式微泵設(shè)計(jì)及特性分析 Design and analysis of valveless micropump in microfluidics |
| 作者： 王瀚林 周騰 史留勇 葛鑒 |
| 單位：海南大學(xué)機(jī)電工程學(xué)院(海口570228) |
| 關(guān)鍵詞： 無(wú)閥微泵；微流控芯片；有限單元法；數(shù)值仿真；流量控制；流體動(dòng)力學(xué) |
| 分類號(hào)：R318.01 |
| 出版年·卷·期（頁(yè)碼）：2017·36·5（446-450） |
| 摘要： |
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目的 基于微泵流體速度調(diào)節(jié)不準(zhǔn)確、難以實(shí)現(xiàn)流量精確控制等問(wèn)題，以無(wú)閥微泵為研究目標(biāo)，設(shè)計(jì)了一種新型內(nèi)置線彈性棒的無(wú)閥微泵結(jié)構(gòu)。方法 利用線彈性棒的彎曲變形特性及Navier-Stokes方程組，使用有限元方法建立新型無(wú)閥微泵的多物理場(chǎng)耦合數(shù)值模型，通過(guò)參數(shù)掃描計(jì)算分析了在不同驅(qū)動(dòng)振幅和驅(qū)動(dòng)頻率下對(duì)無(wú)閥式微泵輸出凈流量的影響。結(jié)果 在驅(qū)動(dòng)頻率相同的條件下，微泵輸出凈流量隨著驅(qū)動(dòng)振幅的增加而增加；當(dāng)保持驅(qū)動(dòng)振幅不變時(shí)，提升驅(qū)動(dòng)頻率對(duì)微泵輸出性能的影響較弱。結(jié)論 該研究的計(jì)算仿真分析為新型無(wú)閥式微泵的結(jié)構(gòu)設(shè)計(jì)提供數(shù)值參考并積累一定的經(jīng)驗(yàn)。 |
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Objective In order to solve problem in accurately flow rate regulation and difficulty in precisely fluid-flow control,the analysis model is targeted at the valveless micropump with the purpose of studying a new structure. Methods The new structure was contained two linear elastic bars,which based on characteristics of bending deformation on linear elastic bars and the Navier-Stokes equation for theoretical model.The finite element model of the valveless micropump was built by using the finite element software,and the coupled-field simulation analysis was accomplished with the method of parametric sweep,the fluid flow rate in micropump and the net volume pumped are simulated and analyzed under different conditions which were the driving frequency and the driving amplitude. Results The net volume pumped rose up with the increase of the driving amplitude under the same condition of the driving frequency,and the output characteristics of the micropump tended to accomplish common performance. Conclusions It is an useful theoretical model and simulation for research as numerical reference of design and application, this research accumulate certain experience to design the valveless micropump. |
| 參考文獻(xiàn)： |
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