Imaginary Part of the Surface Tension of Water

We report a direct measurement of the imaginary part of the surface tension of water through a dynamic scheme using a thin vertical glass fiber of diameter of 3 tun with one end glued onto a cantilever beam and the other end touching a water-air interface. The frequency dependence of the dissipation...

Full description

Saved in:
Bibliographic Details
Published inChinese physics letters Vol. 31; no. 7; pp. 152 - 155
Main Author 熊小敏 陈岚 左文龙 李龙飞 杨岳彬 庞志勇 张进修
Format Journal Article
LanguageEnglish
Published 01.07.2014
Subjects
Cantilever beams
Delay
Dipping
Dissipation factor
Dynamics
Glass fibers
Mathematical analysis
Surface tension
同频率
玻璃纤维
相位延迟
空气界面
耗散因子
虚部
表面张力
量水
Online AccessGet full text
ISSN0256-307X
1741-3540
DOI10.1088/0256-307X/31/7/076801

Cover

More Information
Summary:We report a direct measurement of the imaginary part of the surface tension of water through a dynamic scheme using a thin vertical glass fiber of diameter of 3 tun with one end glued onto a cantilever beam and the other end touching a water-air interface. The frequency dependence of the dissipation factor experienced by the glass fiber is exactly calculated through measuring the phase delay with various frequencies when the glass fiber is forced to oscillate vertically. We find the same intercept at the dissipation factor axis for different frequency dependences of the dissipation factor for different depths by which the glass fiber is dipped into water. This nonzero dissipation factor at zero frequency presents direct evidence of the existence of the imaginary part of surface tension of water and yields a complex surface tension of water σ^＊ = 0.073 ＋ i（0.017 ± 0.002） N/m at room temperature.
Bibliography:XIONG Xiao-Min, CHEN Lan , ZUO Wen-Long, LI Long-Fei, YANG Yue-Bin, PANG Zhi-Yong, ZHANG Jin-Xiu（ 1 School of Physics and Engineering, Sun Yat-Sen University, Guangzhou 510275 ; 2State Key Laboratory of Optoelectronic Materials and Technologies, Guangzhou 510275 ;3 Guangdong Provincial Key Laboratory of Photovoltaics Technologies, Guangzhou 510006 ;4School of Information Science and Technology, Sun Yat-Sen University, Guangzhou 510006）
11-1959/O4
We report a direct measurement of the imaginary part of the surface tension of water through a dynamic scheme using a thin vertical glass fiber of diameter of 3 tun with one end glued onto a cantilever beam and the other end touching a water-air interface. The frequency dependence of the dissipation factor experienced by the glass fiber is exactly calculated through measuring the phase delay with various frequencies when the glass fiber is forced to oscillate vertically. We find the same intercept at the dissipation factor axis for different frequency dependences of the dissipation factor for different depths by which the glass fiber is dipped into water. This nonzero dissipation factor at zero frequency presents direct evidence of the existence of the imaginary part of surface tension of water and yields a complex surface tension of water σ^＊ = 0.073 ＋ i（0.017 ± 0.002） N/m at room temperature.
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/31/7/076801