Simulation of the head-disk interface gap using a hybrid multi-scale method
Simulation of the head-disk interface gap using a hybrid multi-scale method
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DOI：
10.1007/s10404-018-2126-5
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发表时间：
2018-09
影响因子：
2.8
通讯作者：
B. John;D. Lockerby;A. Patronis;D. Emerson
中科院分区：
文献类型：
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作者：
B. John;D. Lockerby;A. Patronis;D. Emerson
我们提出了一种混合多尺度方法，该方法能够捕获与微型和纳米设备中的建模流相关的不同尺度。我们的模型通过提供将内部（小规模）流动区域耦合到外部（大规模）流动区域的框架，扩展了内部流动多尺度方法的适用性。我们演示了原始方法和新混合方法的应用，以对硬盘驱动器外壳的头盘界面间隙附近的流场进行建模。间隙内的内部流动区域通过扩展的内部流动多尺度方法进行建模，该方法利用非均匀网格的有限差分方案。然后采用我们提出的混合多尺度方法将内部微流区域与间隙外部的流耦合，以捕获入口/出口效应。我们还展示了该方法在捕获其他局部现象（例如由于局部墙壁加热引起的现象）方面的成功应用。
We present a hybrid multi-scale method that provides a capability to capture the disparate scales associated with modelling flow in micro- and nano-devices. Our model extends the applicability of aninternal-flow multi-scale methodby providing a framework to couple the internal (small scale) flow regions to the external (large scale) flow regions. We demonstrate the application of both the original methodology and the new hybrid approach to model the flow field in the vicinity of the head-disk interface gap of a hard disk drive enclosure. The internal flow regions within the gap are modelled by an extended internal-flow multi-scale method that utilises a finite-difference scheme for non-uniform grids. Our proposed hybrid multi-scale method is then employed to couple the internal micro-flow region to the flow external to the gap, to capture entrance/exit effects. We also demonstrate the successful application of the method in capturing other localised phenomena (e.g. those due to localised wall heating).