نوع مقاله : مقاله علمی
نویسنده
گروه مهندسی مکانیک، دانشگاه فنی و حرفهای، تهران، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسنده [English]
Thermal conductivity and contact thermal conductivity play an important role in the design of engineering thermal products. To date, various types of solid and thin film measurement techniques are known. In general, these methods are divided into two categories: stable and transient, each of which is used according to the nature and accuracy required of the measurement, relative to the target test sample. In general, the most common challenge of the techniques for measuring the conductive heat transfer coefficient is related to achieving an error of less than 5%, which is caused by bulk or contact heat transfer. For this reason, choosing the appropriate measurement method for quantitative and accurate measurement of the target sample requires knowledge in the field of thermophysical characteristics, geometry and sample preparation method. It is also important to understand the principles and limitations of testing methods and possible sources of error that affect the final results. In this regard, in the present study, after examining the various aspects of stable and transient measurement methods, including the type of sample, achievable accuracy, costs, activities required for preparation, and other related matters, a comparison has been made between them; finally, the appropriate method has been recommended according to the target sample considering the parameters of measurement time, appropriate sample size, cost, and complexity of the technique.
کلیدواژهها [English]
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