Theoretical Research of Thermal Conductivity Model of Metal Rubber Based on the Wire Helix

2012 ◽  
Author(s):  
Yan-Hong Ma ◽  
Hong-Wei Lu ◽  
Zheng-Dong Ma ◽  
Bin Zhu ◽  
Jie Hong
Keyword(s):  
Heat Transfer ◽  
Thermal Conductivity ◽  
Thermal Conductivity Coefficient ◽  
Heat Transfer Process ◽  
Theoretical Research ◽  
Fourier Law ◽  
Conductivity Model ◽  
Theoretical Support ◽  
Thermal Conductivity Model ◽  
Metal Rubber

The heat transfer process of the Metal Rubber is in combination with the modes of heat transfer and the characteristics of Metal Rubber micro-element structure. Under certain conditions, the heat transfer questions can be simplified to the thermal conductivity questions. Based on the Fourier law, the characteristics of the thermal conductivity of Metal Rubber micro-element structure were analyzed by using thermoelectric analogy method. Combined with the equivalent coefficient law of the thermal conductivity, the thermal conductivity model was established. The formula of the thermal conductivity coefficient was derived. The accuracy of the theoretical model was verified by the experimental results. This study provides strong theoretical support for the application of the heat insulation materials.

Theoretical Analysis on Heat Transfer Characteristics of Metal Rubber

2011 ◽  
Vol 183-185 ◽  
pp. 1696-1700
Author(s):  
Bin Zhu ◽  
Jie Hong ◽  
Yan Hong Ma
Keyword(s):  
Heat Transfer ◽  
Thermal Conductivity ◽  
Thermal Conductivity Coefficient ◽  
Heat Insulation ◽  
Engineering Application ◽  
Porous Metal ◽  
Transfer Model ◽  
Fourier Law ◽  
Theoretical Support ◽  
Metal Rubber

Based on the basic components of the porous Metal Rubber (MR) materials, all kinds of heat transfer modes were analyzed. Wire helix was considered as the micro-element of Metal Rubber by analyzing the characteristics of processing components of Metal Rubber. According to the acoustoelectric analogy method, the heat transfer model of MR was established on the basis of arrangement of wire helix and Fourier Law. The formula of thermal conductivity coefficient was derived. And the LFA 427 instrument was used to obtain thermal conductivity characteristics of MR experimentally. The results showed that the model had certain application. This model was valuable for the analysis of the thermal properties and the design of Metal Rubber. It provided theoretical support for the further engineering application of Metal Rubber in the field of heat insulation.

scholarly journals On heat transfer of weakly compressible power-law flows

2017 ◽  
Vol 21 (6 Part B) ◽  
pp. 2709-2718
Author(s):  
Botong Li ◽  
Liangliang Zhu ◽  
Liancun Zheng ◽  
Wei Zhang
Keyword(s):  
Heat Transfer ◽  
Thermal Conductivity ◽  
Temperature Gradient ◽  
Power Law ◽  
Conductivity Model ◽  
Weakly Compressible ◽  
Power Law Fluids ◽  
Momentum And Heat Transfer ◽  
Thermal Conductivity Model ◽  
Dilatant Fluid

This paper completes a numerical research on steady momentum and heat transfer in power-law fluids in a channel. Weakly compressible laminar fluids are studied with no slip at the walls and uniform wall temperatures. The full governing equations are solved by continuous finite element method. Three thermal conductivity models are adopted in this paper, that is, constant thermal conductivity model, thermal conductivity varying as a function of temperature gradient, and a modified temperature-gradient-dependent thermal conductivity model. The results are compared with each other and the physical characteristics for values of parameters are also discussed in details. It is shown that the velocity curve from the solution becomes straight at higher power-law index. The effects of Reynolds numbers on the dilatant fluid and the pseudo-plastic look similar to each other and their trends can be easily predicted. Furthermore, for different models, the temperature curves also present pseudo-plastic and dilatant properties.

Recasting the Callaway and von Baeyer thermal conductivity model on defective oxide materials: the ZnO–In2O3 system as an example

2015 ◽  
Vol 17 (41) ◽  
pp. 27889-27893 ◽  
Author(s):  
Xin Liang
Keyword(s):  
Thermal Conductivity ◽  
Oxide Materials ◽  
Conductivity Model ◽  
System P ◽  
Thermal Conductivity Model

Recasting the Callaway and von Baeyer model for calculating the thermal conductivity of oxide materials containing defects of various dimensions, illustrated with the ZnO–In2O3 system.

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