表面电荷及外电场对液固界面热阻的影响

doi:10.3866/PKU.WHXB201209042

Acta Phys. -Chim. Sin. ›› 2012, Vol. 28 ›› Issue (12): 2939-2943.doi: 10.3866/PKU.WHXB201209042

• CATALYSIS AND SURFACE SCIENCE • Previous Articles Next Articles

Effects of Surface Charge and Electric Field on the Interfacial Thermal Resistance at Liquid/Solid Interfaces

GE Song, CHEN Min

The effect of an applied electric field and the surface charge on the interfacial thermal resistance between water and solid has been studied using nonequilibrium molecular dynamics simulations. The results reveal that the electric field decreases the water-solid interfacial thermal resistance when it is perpendicular to the interface. However, it shows that the electric field has a negligible effect on the thermal resistance when it is parallel to the interface. Both positively and negatively charged surfaces decrease the interfacial thermal resistance. The relationship between the interfacial thermal resistance and the surface charge density and electric field strength is a quadratic function. This study demonstrates that applying an external electric field or a surface charge are effective ways of manipulating the interfacial thermal resistance.

Received:2012-07-29 Revised:2012-09-03 Published:2012-11-14
Supported by:
The project was supported by the National Key Basic Research Program, China (973) (2009CB219805) and National Natural Science Foundation of China (51076078)

Abstract

Abstract:

Effects of electric field and surface charge on the interfacial thermal resistance between water and solid are discussed by using nonequilibrium molecular dynamics simulation. The results reveal that the electric filed decreases the water-solid interfacial thermal resistance when it is perpendicular to the interface. However, it shows negligible effects on the thermal resistance when parallel to the interface. Both positively and negatively charged surfaces decrease the interfacial thermal resistance. The relation between the interfacial thermal resistance and the surface charge density or electric field strength follows the quadratic function. The study demonstrates that applying external electric field or surface charge is an effective method to manipulate the interfacial thermal resistance.

Key words: Surface charge, External electric field, Liquid/solid interface, Interfacial thermal resistance, Molecular dynamics simulation

GE Song, CHEN Min. Effects of Surface Charge and Electric Field on the Interfacial Thermal Resistance at Liquid/Solid Interfaces[J]. Acta Phys. -Chim. Sin. 2012, 28(12), 2939-2943. doi: 10.3866/PKU.WHXB201209042

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Effects of Surface Charge and Electric Field on the Interfacial Thermal Resistance at Liquid/Solid Interfaces

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