线圈绕Y轴倾斜时方腔内空气磁力与重力耦合对流的数值模拟

摘要

In the present study,Magnetic and Gravitational convection of air in a cubic enclosure with an electric coil inclined around the Y axis is numerically investigated under microgravity and gravity environment.Biot-Savart＇s is used to calculate magnetic field.The governing equations in primitive variables are discretized by the finite-volume method and solved by the SIMPLE algorithm.Computations are performed for a range of the Rayleigh number from 104 to 105,the inclination angle of coil yeuler from-90° to 90°,and magnetic force parameter γ from 0 to 200.The flow and temperature fields for the air thermomagnetic convection were presented and mean Nusselt numbers on the walls were calculated and compared.The results show that both the magnetic force and the coil inclination have significant effect on the flow field and heat transfer in a cubic enclosure.With the increases of γ number and Ra number,the overall heat transfer is enhanced gradually.%数值分析了微重力与重力环境下圆形载流线圈绕Y轴倾斜时方腔内空气热磁对流。磁场计算采用毕奥萨伐定律;控制方程基本变量采用控制容积法离散,求解采用SIMPLE算法。计算过程中Ra数的变化范围为104~105,线圈倾斜角yeuler的变化范围为-90°~90°,磁场力数γ数的变化范围为0~200。获得了空气热磁对流的流场和温度场,以及平均Nusselt数并进行了比较,计算结果表明磁场力和线圈倾斜角对方腔内流场和换热有重要影响。随γ数和Ra数的增加,方腔内对流变得越来越强。