哔哩哔哩免费观看入口,伊人久久大香线蕉AⅤ色,日本一区二区三区偷拍视频,一级片久久久久久久早上

產(chǎn)品列表PRODUCTS LIST

首頁 > 測試服務(wù) > TC3000 Thermal Conductivity
TC3000 Thermal Conductivity
點擊次數(shù):2264 更新時間:2014-09-01

 

Thermal conductivity measuring methods can be divided into steady-state method and non-steady-state method by macroscopic mechanism of thermal conductivity. 

Steady-state method requires long period ,and there are also many other factors which affect measuring accuracy. However, non-steady-state method has the advantage of short measuring time, high accuracy and low requirements for operational environment. Especially, the transient hot-wire method has been considered internationally as the best measuring method of thermal conductivity in the research area of thermal conductivity.

 

Measuring Principle

The origin of hot-wire method could be traced back to the year 1780 when an American scientistJoseph Priestley made the first experiment about heat transfer ability of air. In 1931,Stâlhane and Pyk, who are the first to adopt transient hot-wire method in measuring the thermal conductivity of solid, powder and liquid,  Hot-wire method is now widely used in gas, liquid, solid, metal fusion and so on. 

 
黄龙县| 长垣县| 阿坝县| 左权县| 桦甸市| 光泽县| 社会| 灌云县| 太白县| 米易县| 昌黎县| 铁力市| 集贤县| 荥经县| 华蓥市| 合阳县| 大竹县| 莒南县| 咸丰县| 大理市| 进贤县| 曲阳县| 汝城县| 安陆市| 天长市| 香河县| 昭苏县| 榆中县| 清流县| 宜兰县| 宁阳县| 新巴尔虎左旗| 应用必备| 佛冈县| 福贡县| 井陉县| 东阿县| 岳阳县| 贞丰县| 兰州市| 类乌齐县|