Motoyuki Nawa

Simple Type PIV Measuring Tool

PIV system now available are mostly large and painstaking to deal with. In case of precise experiment, it is inevitable. However, in an engineering section of a factory, it does not always need such an accurate system. This time, we formed simple type PIV measuring tool for the purpose of this kind of requirement. In this report, we took a circuit board model needed for cooling as its test sample. We visualized flow by forward lighting and applied PIV analysis to the obtained picture. Comparing with numerical analysis, we found that this tool is useful for rough evaluation in field use.

PIV Analysis of Fluctuating Flow in a Two Dimensional Channel

It is one of the problems to measure flow rate with fluctuation. Especially, in case of using flow sensors, flow measurement accuracy is largely affected by flow velocity profile based on fluctuation. This is because flow rate is calculated by using flow coefficient which is used for calculating mean flow velocity. In this paper, we visualized flow velocity profile with fluctuation in a two dimensional channel with and without cavity using PIV system. Thereby, we revealed the conditions in measuring flow rate of fluctuating flow.