Numerical Analysis of the Effect of an Inclined Coil on Thermomagnetic Convection of Air in a Porous Cubic Enclosure
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摘要: 数值分析了微重力下圆形载流线圈倾斜时多孔介质方腔内空气热磁对流. 磁场计算采用毕奥--萨伐定律求解; 动量方程与能量方程分别采用达西模型与局部热非平衡模型求解. 计算结果表明随着磁场力数\gamma 数和Da数的增加, 方腔内对流变得越来越强. 线圈倾斜角x_{\rm euler}从0^\circ到90^\circ变化时, 对流结果关于x_{\rm euler}=45^\circ呈现对称分布. Nu_{\rm m}数随线圈倾斜角的改变而变化且每个工况下局部最大Nu_{\rm m}数出现在x_{\rm euler}=45^\circ. 局部最小Nu_{\rm m}数出现在x_{\rm euler}=0^\circ, 90^\circ.
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关键词:
- 局部热非平衡模型
Abstract: Thermomagnetic convection of air in a porous cubicenclosure with an inclined electric coil is numerically investigated undermicrogravity environment. Biot-Savart's law was used to calculate magneticfield. The momentum equations and energy equations were solved by the DarcyModel and the local thermal non-equilibrium model. The results show that thenatural convection of air is strengthened in the porous cubic enclosure withthe increase of \gamma number and Da number. The resultedconvection is symmetrical in terms of the angle at x_{\rmeuler}=45^\circ when the range of inclination angleis from 0^\circ to 90^\circ. The coil inclination changes theNu_{\rm m} number and a local maximum is obtained at x_{\rmeuler}=45^\circ for every case. Localminima are obtained at x_{\rm euler}=0^\circ and 90^\circ.-
Key words:
- local thermal non-equilibrium model
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