日韩精品无码一区二区三区,免费视频精品一区二区三区,51视频在线视频免费观看

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):1690 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. 

 

        主站蜘蛛池模板: 曲靖市| 漠河县| 定西市| 利津县| 温泉县| 宜都市| 湄潭县| 招远市| 洛浦县| 淳化县| 延吉市| 大同县| 万山特区| 什邡市| 同心县| 南雄市| 贵定县| 汝南县| 北川| 喀喇| 阿拉善盟| 镇远县| 武宣县| 江安县| 奉化市| 饶河县| 监利县| 日喀则市| 新绛县| 神池县| 太湖县| 临城县| 丰宁| 方山县| 衡山县| 灵丘县| 阳信县| 自治县| 望都县| 无极县| 石楼县|