首页> 外文会议>Frontiers in Biomedical Devices Conference; 20070607-08; Irvine,CA(US) >EFFECTS OF SURFACE ROUGHNESS ON FLOWS THROUGH NANO/MICRO CHANNEL BASED BIOMEDICAL DEVICES - A STUDY BY LATTICE BOLTZMANN METHOD
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EFFECTS OF SURFACE ROUGHNESS ON FLOWS THROUGH NANO/MICRO CHANNEL BASED BIOMEDICAL DEVICES - A STUDY BY LATTICE BOLTZMANN METHOD

机译:表面粗糙度对基于纳米/微通道的生物医学器件流动的影响-格子Boltzmann方法研究

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摘要

The objective of this research is to study the effects of surface roughness on flows through nano/micro channels with a focus on designing better biomedical devices. A two dimensional computational model for fluid flow based on Lattice Boltzmann (LB) method has been applied first to a 10 μm width channel with flat boundary conditions and the flow profiles have been found to have an excellent comparison with analytical results. Rough boundary conditions using rectangular tooth-shaped corrugations giving about 0.25 μm average roughness have then been applied to the same 10 μm channel flow. We have observed significant differences in the velocity profiles between the flows with rough and flat boundary conditions. Boundary slips have also been observed in case of flows with rough boundary conditions. Surface roughness effects have increased or the differences between the flows with rough and flat boundary conditions have increased with decreased channel widths.
机译:这项研究的目的是研究表面粗糙度对通过纳米/微通道的流动的影响,重点是设计更好的生物医学设备。首先,将基于莱迪思·玻尔兹曼(LB)方法的二维流体流动计算模型应用于边界条件平坦的10μm宽度通道,并且发现其流动剖面与分析结果具有极好的对比。然后,使用矩形齿状波纹的粗糙边界条件给出了大约0.25μm的平均粗糙度,然后将其应用于相同的10μm通道流。我们已经观察到在边界条件粗糙和平坦的情况下,流速之间的速度分布存在明显差异。在边界条件不佳的情况下,也观察到边界滑移。随着通道宽度的减小,表面粗糙度的影响增加了,或者在粗糙和平坦边界条件下的流动之间的差异增加了。

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