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: 五大连池市| 新郑市| 济南市| 建湖县| 观塘区| 昌平区| 庆阳市| 吉林市| 天津市| 长白| 梅州市| 扎赉特旗| 阿荣旗| 惠东县| 吉隆县| 邮箱| 武强县| 同江市| 都昌县| 萍乡市| 鲁山县| 松江区| 贵德县| 剑阁县| 宜丰县| 龙游县| 水城县| 嘉禾县| 巴林左旗| 松阳县| 昭平县| 连山| 普格县| 沧源| 尚志市| 江口县| 独山县| 西平县| 习水县| 常熟市| 鹤岗市|