同温度及曲率NaK-BASE管内Na+和K+迁移数值模拟

doi:10.3976/j.issn.1002-4026.2016.05.013

Abstract

Abstract:

We established a fractal model for the microstructure of NaK-BASE tube with the transport of Na+ and K+ in NaK-BASE tube as a subject. We simulated the transport of Na+ and K+ in NaK-BASE tube with PoissonNernstPlanck multiions transport model. We also investigated ion transport process in NaK-BASE tube with different temperatures. Results show that cation transport concentration and surface charge density of Na+ and K+ have direct relationship with the temperature of NaK-BASE tube. Peak value of cation concentration in NaK-BASE tube will decrease with the increase of BASE tube temperature. Peak value of Na+ and K+ can be enhanced by the increase of NaK-BASE tube tortuosity. Moreover, surface charge density of Na+ and K+ in BASE tube gradually increases with the increase of temperature. Discrepancy of surface charge density gradually increases with the increase of tortuosity.

Key words: surface charge density, alumina solid electrolyte tube, cation concentration, alkali metal thermoelectric converter, beta", temperature

CLC Number:

TK124

GUAN Ning,LIU Zhigang, JIANG Guilin, ZHANG Chengwu,L Mingming. Transport numerical simulation of Na+ and K+ in NaKBASE tube with different temperatures and tortuosity[J].SHANDONG SCIENCE, 2016, 29(5): 76-80.

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Transport numerical simulation of Na+ and K+ in NaKBASE tube with different temperatures and tortuosity

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