中文摘要：

为考察各颗粒参数对颗粒与气相温度场间相互作用的影响，对非等温气固两相各向同性湍流进行直接数值模拟。结果表明，在具有温度梯度的各向同性湍流中，加大颗粒质量载荷可使气相温度脉动强度和温度耗散率单调递减，加大颗粒质量载荷和颗粒比热均可使温度场的概率密度函数明显偏离高斯分布。

英文摘要：

Direct numerical simulations were conducted to investigate the effects of various particle parameters on the interaction between particle and temperature field of fluid flow in isotropic turbulence with a mean temperature gradient. The results show that with increasing particle mass loading, the fluid temperature intensity and the dissipation rate of the fluid temperature decrease linearly, and raising the particle mass loading or specific heat can lead the probability density function of the temperature field away from Gaussian distribution in an obvious way.