The major focus of the current study was the modeling of 3D Darcy–Forchheimer flow of water–CNTs nanofluid. Impacts of non-uniform heat source/sink and Ohmic heating on 3D magneto hydrodynamic flow of water–CNTs (SWCNT and MWCNT) nanofluid were assessed. The numerical analysis method ‘Runge–Kutta–Fehlberg’ was applied for existing PDEs. It was noted that the thermal boundary layer was extended for increasing Eckert numbers along \( x\;{\text{and}}\;y \) direction, when the fluid showed movement away from the surface. Moreover, the gap in thermal boundary layer for H₂O-SWCNT was more in comparison with H₂O–MWCNT nanofluid. The numerical data of this study were validated with earlier reported outcomes and were observed to have good concord.

当前研究的主要重点是水-CNTs纳米流体的3D Darcy-Forchheimer流动建模。评估了不均匀的热源/散热器和欧姆加热对水-CNT（SWCNT和MWCNT）纳米流体的3D磁流体动力流的影响。数值分析方法“ Runge–Kutta–Fehlberg”适用于现有的PDE。注意到当流体显示出远离表面运动时，热边界层被扩展以沿\（x \; {\ text {and}} ;; y \）方向增加Eckert数。此外，对于中的H的热边界层的间隙₂ -O-SWCNT更在用H比较₂ O形MWCNT纳米流体。这项研究的数值数据已得到较早报道的结果的验证，并被认为具有良好的一致性。