The Experts below are selected from a list of 2526 Experts worldwide ranked by ideXlab platform
David A Balzarini - One of the best experts on this subject based on the ideXlab platform.
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lorentz Lorenz Coefficient critical point constants and coexistence curve of 1 1 difluoroethylene
Physical Review E, 2005Co-Authors: Nicola Fameli, David A BalzariniAbstract:We report measurements of the Lorentz-Lorenz Coefficient density dependence L(rho), the critical temperature Tc, and the critical density rho c of the fluid 1,1-difluoroethylene H2C2F2. Lorentz-Lorenz Coefficient data were obtained by measuring refractive index n, and density rho of the same fluid sample independently of one another. Accurate determination of the Lorentz-Lorenz Coefficient is necessary for the transformation of refractive index data into density data from optics-based experiments on critical phenomena of fluid systems done with different apparatuses, with which independent measurement of n and rho is not possible. Measurements were made along the coexistence curve of the fluid and span the density range 0.01 to 0.80 g cm(-3). The Lorentz-Lorenz Coefficient results show a stronger density dependence along the coexistence curve than previously observed in other fluids, with a monotonic decrease from a density of about onward, and an overall variation of about 2.5% in the density range studied. No anomaly in the Lorentz-Lorenz function was observed near the critical density. The critical temperature is measured at Tc=(302.964+/-0.002) K (29.814 degrees C) and the measured critical density is rho c=(0.4195+/-0.0018) g cm(-3).
Nicola Fameli - One of the best experts on this subject based on the ideXlab platform.
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lorentz Lorenz Coefficient critical point constants and coexistence curve of 1 1 difluoroethylene
Physical Review E, 2005Co-Authors: Nicola Fameli, David A BalzariniAbstract:We report measurements of the Lorentz-Lorenz Coefficient density dependence L(rho), the critical temperature Tc, and the critical density rho c of the fluid 1,1-difluoroethylene H2C2F2. Lorentz-Lorenz Coefficient data were obtained by measuring refractive index n, and density rho of the same fluid sample independently of one another. Accurate determination of the Lorentz-Lorenz Coefficient is necessary for the transformation of refractive index data into density data from optics-based experiments on critical phenomena of fluid systems done with different apparatuses, with which independent measurement of n and rho is not possible. Measurements were made along the coexistence curve of the fluid and span the density range 0.01 to 0.80 g cm(-3). The Lorentz-Lorenz Coefficient results show a stronger density dependence along the coexistence curve than previously observed in other fluids, with a monotonic decrease from a density of about onward, and an overall variation of about 2.5% in the density range studied. No anomaly in the Lorentz-Lorenz function was observed near the critical density. The critical temperature is measured at Tc=(302.964+/-0.002) K (29.814 degrees C) and the measured critical density is rho c=(0.4195+/-0.0018) g cm(-3).
Hongxu Zhi - One of the best experts on this subject based on the ideXlab platform.
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numerical simulation of temperature voltage relation in electrical contacts and correction of classical kohlrausch s equation
IEEE Transactions on Electron Devices, 2016Co-Authors: Wanbin Ren, Jianmin Wei, Xiangxing Meng, Hongxu ZhiAbstract:The increase in temperature caused by Joule heat is a very important concern to the electrical interconnections. The maximum temperature of contacts in these interconnections is not easily measurable, but can be calculated by the temperature–voltage relation, which is also called Kohlrausch’s equation. In this paper, we build a finite-element model of spherical copper contact pairs for thermal–electrical coupled analysis. The material properties of the model involved are closely dependent on the temperature. By comparing simulation results with the calculation of the temperature–voltage equation, the accuracy of Kohlrausch’s equation has been verified. Furthermore, the effects of electric current, side surface heat convection Coefficient, and Lorenz Coefficient on Kohlrausch’s equation are investigated explicitly. It is determined that the calculation error of Kohlrausch’s equation could be attributed to the assumed constant Lorenz Coefficient, and then a correction method for Kohlrausch’s equation is proposed.
Wanbin Ren - One of the best experts on this subject based on the ideXlab platform.
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numerical simulation of temperature voltage relation in electrical contacts and correction of classical kohlrausch s equation
IEEE Transactions on Electron Devices, 2016Co-Authors: Wanbin Ren, Jianmin Wei, Xiangxing Meng, Hongxu ZhiAbstract:The increase in temperature caused by Joule heat is a very important concern to the electrical interconnections. The maximum temperature of contacts in these interconnections is not easily measurable, but can be calculated by the temperature–voltage relation, which is also called Kohlrausch’s equation. In this paper, we build a finite-element model of spherical copper contact pairs for thermal–electrical coupled analysis. The material properties of the model involved are closely dependent on the temperature. By comparing simulation results with the calculation of the temperature–voltage equation, the accuracy of Kohlrausch’s equation has been verified. Furthermore, the effects of electric current, side surface heat convection Coefficient, and Lorenz Coefficient on Kohlrausch’s equation are investigated explicitly. It is determined that the calculation error of Kohlrausch’s equation could be attributed to the assumed constant Lorenz Coefficient, and then a correction method for Kohlrausch’s equation is proposed.
Jianmin Wei - One of the best experts on this subject based on the ideXlab platform.
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numerical simulation of temperature voltage relation in electrical contacts and correction of classical kohlrausch s equation
IEEE Transactions on Electron Devices, 2016Co-Authors: Wanbin Ren, Jianmin Wei, Xiangxing Meng, Hongxu ZhiAbstract:The increase in temperature caused by Joule heat is a very important concern to the electrical interconnections. The maximum temperature of contacts in these interconnections is not easily measurable, but can be calculated by the temperature–voltage relation, which is also called Kohlrausch’s equation. In this paper, we build a finite-element model of spherical copper contact pairs for thermal–electrical coupled analysis. The material properties of the model involved are closely dependent on the temperature. By comparing simulation results with the calculation of the temperature–voltage equation, the accuracy of Kohlrausch’s equation has been verified. Furthermore, the effects of electric current, side surface heat convection Coefficient, and Lorenz Coefficient on Kohlrausch’s equation are investigated explicitly. It is determined that the calculation error of Kohlrausch’s equation could be attributed to the assumed constant Lorenz Coefficient, and then a correction method for Kohlrausch’s equation is proposed.
