This article unveils the combined impact of heat generation/absorption and Joule heating on MHD flow of Ag-H2O nanofluid into a porous stretching/shrinking divergent/convergent channel with viscous dissipation and solid volume fraction. The mathematical modeling is presented for the existing equations of continuity, momentum, and energy fraction. The reduced boundary value problem is solved numerically employing Runge-Kutta-Fehlberg (RKF) method via shooting scheme and then the outcomes are sketched and interpreted. The results explore that the thermal boundary layer thickness of the stretching divergent and the shrinking divergent channels enhance by increasing the value of the Eckert number, while the opposite tendency is scrutinized on the momentum boundary layer thickness by increasing the value of the porosity parameter for the stretching divergent and the shrinking convergent channels.

中文翻译：

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通过多孔拉伸/收缩会聚/发散通道纳米粒子和发热/吸收对 Ag-H2O 纳米流体 MHD 流动的作用

本文揭示了热量产生/吸收和焦耳加热对 Ag-H2O 纳米流体 MHD 流入具有粘性耗散和固体体积分数的多孔拉伸/收缩发散/收敛通道的综合影响。为现有的连续性、动量和能量分数方程提供了数学建模。利用Runge-Kutta-Fehlberg(RKF)方法通过射击方案数值求解约简边值问题，然后对结果进行草图和解释。结果表明，随着埃克特数的增加，拉伸发散通道和收缩发散通道的热边界层厚度增加，