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: 南昌县| 土默特左旗| 白玉县| 余姚市| 鹿泉市| 霍林郭勒市| 鲁山县| 邯郸县| 肃南| 津市市| 城固县| 扬州市| 浙江省| 留坝县| 车险| 富阳市| 庆阳市| 巴林右旗| 泰宁县| 清水河县| 龙海市| 芮城县| 阿拉善左旗| 贵溪市| 确山县| 威海市| 凉城县| 库尔勒市| 运城市| 南华县| 中阳县| 水城县| 磴口县| 公安县| 防城港市| 山阳县| 屏边| 清涧县| 平利县| 绥江县| 济源市|