In this work, the behavior of a temperature-sensitive hydrogel micro-channel is investigated by considering fluid–structure interaction (FSI). The micro-channel behavior is simulated numerically via both FSI and non-FSI frameworks. The results show the importance of FSI effects in these devices. FSI consideration affects the performance of the under-study micro-channel such as its closing temperature and stress field within the hydrogel part of the micro-channel. In addition, the flow rate of the micro-channel is calculated that depends on the deformation of the hydrogel and velocity field of the fluid domain in the FSI simulations. Finally, a parametric study is performed to examine the effect of inlet pressure of the micro-channel, the hydrogel thickness, the hydrogel cross-linking density, and the micro-channel width on the micro-channel performance. The obtained FSI results in comparison with those of non-FSI show that the FSI simulation is necessary for the micro-channels, especially for those of them with low cross-linking density and small thickness of the hydrogel. Furthermore, the FSI simulation is vital for those micro-channels with larger inlet pressures and larger widths.

中文翻译：

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通过 FSI 和非 FSI 方法研究温度敏感水凝胶微通道的行为

在这项工作中，通过考虑流固耦合（FSI）来研究温度敏感水凝胶微通道的行为。微通道行为通过 FSI 和非 FSI 框架进行数值模拟。结果表明 FSI 效应在这些设备中的重要性。FSI 考虑会影响正在研究的微通道的性能，例如其关闭温度和微通道水凝胶部分内的应力场。此外，微通道的流速计算取决于水凝胶的变形和 FSI 模拟中流体域的速度场。最后，进行参数研究以检查微通道入口压力、水凝胶厚度、水凝胶交联密度、以及微通道宽度对微通道性能的影响。获得的 FSI 结果与非 FSI 的结果相比，表明 FSI 模拟对于微通道是必要的，特别是对于那些具有低交联密度和小水凝胶厚度的微通道。此外，FSI 模拟对于那些入口压力较大和宽度较大的微通道至关重要。