Heat transfer and flow characteristics of Tiwari – Das model nanofluid inside a differentially heated square enclosure pondered with single walled carbon nanotubes and water by taking thermal radiation is examined in this paper. Vertical walls of the cavity are isothermal, such as, left wall is heated and right wall is cooled. The modeled momentum and energy equations are numerically solved by utilizing finite difference scheme. Streamlines and Isotherms with different values of pertinent variables, such as, volume fraction parameter $(0.01\le \phi \le 0.05)$, Rayleigh number $({10}^5\le Ra\le 3\times {10}^5)$, Reynolds number $(200\le Re\le 400)$, Prandtl number $(6.2\le Pr\le 10.2)$ and radiation parameter $(0.01\le \mathrm{R}\le 0.05)$ are plotted through graphs. Average Nusselt number values are also calculated for several values of parameters and are also represented through plots. It is found that the rate of heat transfer of nanofluid is augmented up to 6% when single walled carbon nanotubes of 5% are added to the base fluid. Radiation parameter enhances the values of Nusselt number inside the cavity. The present numerical code is validated with available data and noticed good agreement.

本文研究了通过吸收热辐射，在考虑到单壁碳纳米管和水的差热方形罩内的Tiwari – Das模型纳米流体的传热和流动特性。空腔的垂直壁是等温的，例如左壁被加热而右壁被冷却。利用有限差分法对建模的动量和能量方程进行数值求解。具有相关变量值（例如体积分数参数）不同的流线和等温线$（0.01\le \phi \le 0.05）$，瑞利数 $（{10}^5\le \mathrm{[R}\mathrm{一种}\le 3\times {10}^5）$雷诺数 $（200\le \mathrm{[R}Ë\le 400）$，Prandtl号 $（6.2\le P\mathrm{[R}\le 10.2）$ 和辐射参数 $（0.01\le \mathrm{[R}\le 0.05）$通过图表绘制。还可以为几个参数值计算平均努塞尔数值，并且还可以通过曲线图来表示。发现当将5％的单壁碳纳米管添加到基础流体中时，纳米流体的传热速率增加到高达6％。辐射参数增强了腔体内的Nusselt值。本数字代码已通过可用数据验证，并具有良好的一致性。