The present investigation is reported by considering bioconvection phenomenon in nanofluids saturated over non-Darcian porous medium with viscous dissipation and ohmic heating. Motile gyrotactic micro-organisms were assumed to be swimming in the upward direction. The governing equations were converted to nonlinear ordinary differential equations by similarity transformation and solved with the help of a Runge-Kutta-Fehlberg scheme using shooting technique. Graphical plotting of various physical parameters is done for velocity, temperature, concentration, and density of motile gyrotactic micro-organisms. It is found that density of motile micro-organisms decreases for bioconvection and Peclet number. Further, porous parameter and inertia coefficient have reducing effects for the velocity profile. A comparison of the present study with previous work is conducted to validate the code.

中文翻译：

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非达西多孔介质中黏性耗散和热流加热过程中纳米流的生物对流

通过考虑在具有粘性耗散和欧姆加热的非达西多孔介质上饱和的纳米流体中的生物对流现象来报告本研究。运动的旋回微生物被假定在向上游泳。通过相似变换将控制方程转换为非线性常微分方程，并借助使用射击技术的Runge-Kutta-Fehlberg方案进行求解。绘制了各种物理参数的图形，以绘制运动的旋回微生物的速度，温度，浓度和密度。发现生物对流和Peclet数的运动微生物密度降低。此外，多孔参数和惯性系数对速度分布具有减小的影响。