Carbon nanotubes are used to achieve high heat transfer rates in a variety of engineering applications include thermal storage systems, electronic component cooling, high-performance building insulation, heat exchangers and drying technologies. Hence the aim of this article is to examine the addition of single walled carbon nanotubes (SWCNT) and multi-walled carbon nanotubes (MWCNT) to water in a vertical microchannel to improve heat transfer. The effects of MHD, slip, convective boundary condition and heat source/sink are incorporated. The Brinkman-Forchheimer flow model and type II hybrid nanofluid model is adopted. Converted dimensionless differential equations are solved numerically via Dsolve command with the aid of Maple. The simulation assessment is worked out by graphs. One of the main tasks of the analysis is to compare MWCNT/water and SWCNT-MWCNT/water. It is shown that the improvement of the heat source/sink parameter improves the temperature and the rate of heat transfer in MWCNT/water is higher than SWCNT-MWCNT/water. Also larger values of Lorentz force and buoyancy force decreases the drag coefficient.

碳纳米管用于在各种工程应用中实现高传热率，包括蓄热系统、电子元件冷却、高性能建筑绝缘、热交换器和干燥技术。因此，本文的目的是研究在垂直微通道中向水中添加单壁碳纳米管 (SWCNT) 和多壁碳纳米管 (MWCNT) 以改善传热。包括 MHD、滑移、对流边界条件和热源/汇的影响。采用 Brinkman-Forchheimer 流动模型和 II 型混合纳米流体模型。在 Maple 的帮助下，通过 Dsolve 命令对转换后的无量纲微分方程进行数值求解。模拟评估是通过图表来计算的。分析的主要任务之一是比较 MWCNT/water 和 SWCNT-MWCNT/water。结果表明，热源/汇参数的改进提高了温度，并且多壁碳纳米管/水的传热速率高于单壁碳纳米管-多壁碳纳米管/水。洛伦兹力和浮力的较大值也会降低阻力系数。