Simultaneous, spatially-resolved temperature and velocity measurements in microchannel flows

被引：0

作者：

Wereley, S ^{[1
]}

Hohreiter, V ^{[1
]}

Chung, J ^{[1
]}

机构：

[1] Purdue Univ, Sch Mech Engn, W Lafayette, IN 47907 USA

来源：

THERMAL CHALLENGES IN NEXT GENERATION ELECTRONIC SYSTEMS | 2002年

关键词：

micro particle image velocimetry; PIV; temperature; Brownian; microchannel;

D O I：

暂无

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

This paper demonstrates an extension to the micro-particle image velocimetry (muPIV) technique that allows simultaneous velocity and temperature measurement. The technique is based on the observation that Brownian motion will cause width-wise broadening of the cross-correlation peak. A standard muPIV algorithm measures the deterministic component of the tracer particle velocity while a new algorithm measures the increase in correlation peak width caused by the random, uncorrelated Brownian particle motion. The Brownian motion can be related directly to the ratio of dynamic viscosity to absolute temperature. Experimental results were obtained using fluorescent (rhodamine 542/612) spherical 700nm diameter polystyrene-latex particles in water. Temperature changes up to 25degreesC were determined with an experimental uncertainty of +/-3degreesC. Modeling results show that this uncertainty can be reduced to less than +/-1degreesC. Finally, guidelines are established for choosing experimental parameters anywhere in the temperature/velocity phase space.

引用

页码：95 / 102

页数：8

共 8 条

[1] PULSED LASER TECHNIQUE APPLICATION TO LIQUID AND GASEOUS FLOWS AND THE SCATTERING POWER OF SEED MATERIALS [J].