国模无码人体一区二区,端庄美艳人妻教师的沉沦,亚洲中久无码永久在线观看同,久久99精品国产麻豆不卡

產(chǎn)品列表PRODUCTS LIST

首頁(yè) > 測(cè)試服務(wù) > TC3000 Thermal Conductivity
TC3000 Thermal Conductivity
點(diǎn)擊次數(shù):1805 更新時(shí)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. 

 
东乌| 南澳县| 固阳县| 库尔勒市| 绥棱县| 开原市| 阿合奇县| 万源市| 东丰县| 临沂市| 清新县| 房山区| 乌拉特中旗| 申扎县| 荃湾区| 马公市| 屯留县| 宝丰县| 龙门县| 平南县| 从化市| 望城县| 三河市| 太仆寺旗| 景宁| 安龙县| 湘乡市| 高碑店市| 永顺县| 托克逊县| 柳河县| 永州市| 榆林市| 白沙| 四平市| 云和县| 盐城市| 巴里| 津南区| 屏南县| 都昌县|