The effects of forced convection on the power dissipation of constant-temperature thermal conductivity sensors

被引：10
|
作者：
Huang, Y
Bau, HH
机构：
[1] Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania, Philadelphia, PA
来源：
JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME | 1997年 / 119卷 / 01期
关键词：
Forced convection; Instrumentation; Transient & Unsteady Heat Transfer;
D O I：
10.1115/1.2824097
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The effect of forced convection on the power dissipation of cylindrical and planar, constant temperature, thermal conductivity detectors (TCDs) is investigated theoretically. Such detectors can be used either for on-line continuous sensing of fluid thermal conductivity or for determining the sample concentrations in gas chromatography. A low peclet number, asymptotic theory is constructed to correlate the TCD's power dissipation with the Peclet number and to explain experimental observations. Subsequently, the effect of convection on the TCD's power dissipation is calculated numerically for both time-independent and time-dependent flows. The theoretical predictions are compared with experimental observations.
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页码：30 / 37
页数：8
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