Pressure field evaluation in microchannel junction flows through μPIV measurement

被引：0
作者：
N. Fujisawa
Y. Nakamura
F. Matsuura
Y. Sato
机构：
[1] Niigata University,Department of Mechanical Engineering
[2] Niigata University,Division of Digestive and General Surgery, Graduate School of Medical and Dental Sciences
来源：
Microfluidics and Nanofluidics | 2006年 / 2卷
关键词：
Microfluid; Measurement; μPIV; Pressure; Velocity;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
An experimental method for evaluating pressure fields in a microchannel flow was studied using μPIV measurement in conjunction with the pressure Poisson equation. The pressure error due to the influence of numbers of measurement planes, computational grids for solving pressure Poisson equation, and an experimental error in μPIV measurement was evaluated with respect to the exact solution of Navier–Stokes equation for straight microchannel flow. The mean velocity field in microchannel junction flows with bifurcation and confluence was measured by a μPIV system, which consists of a CCD camera and a microscope with an in-line illumination of white light from stroboscopes. The planar velocity fields at various cross-sections of the microchannel flow were measured by traversing the focal plane within a depth of focus of the microscope. The pressure contour in the microchannel flow was evaluated by solving the pressure Poisson equation with the experimental velocity data. The results indicate that the pressure field in the microchannel junction flow agrees closely with the numerical simulation of laminar channel flow, which suggests the validity of the present method.
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页码：447 / 453
页数：6
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