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首页> 外文期刊>Arabian Journal for Science and Engineering. Section A, Sciences >Effects of Variable Viscosity on Asymmetric Flow of Non‑Newtonian Fluid Driven Through an Expanding/Contracting Channel Containing Porous Walls
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Effects of Variable Viscosity on Asymmetric Flow of Non‑Newtonian Fluid Driven Through an Expanding/Contracting Channel Containing Porous Walls

机译：可变粘度对含有多孔壁的膨胀/承包通道驱动的非牛顿流体不对称流动的影响

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摘要

Flow in porous channel or pipe has attained significant attention in biophysics, especially when the walls are contracting or expanding. The purpose of this work is to explore the effects of variable viscosity on the asymmetric laminar flow of Casson fluid (CF) with thermal radiation in an expanding/contracting channel having porous walls. The flow equations, by using appropriate transformations, are reduced to ordinary differential equations (ODEs). The method of homotopy analysis (HAM) is used to obtain the expressions for the velocity field along with the temperature profile. Graphs are portrayed for different parametric values and analyzed in detail for the consequent dynamic attributes, especially the viscosity-dependent parameter, CF parameter, and the expansion ratio. CF parameter escalates the velocity of the fluid near the lower wall, but after mid-way, it starts decreasing. The fluid velocity due to temperature-dependent (TD) viscosity parameter is more noteworthy for Newtonian fluid (NF) relative to non-Newtonian (NN) fluid. As anticipated, the radiation parameter causes the fluid to heat up.
机译：多孔通道或管道流动在生物物理学中达到了重大关注，特别是当墙壁承包或扩展时。本作作品的目的是探讨可变粘度在具有多孔壁的膨胀/收缩通道中具有热辐射的鲫鱼流体（CF）的不对称层流的影响。通过使用适当的变换来减少流程方程，减少到常规方程（ODES）。同型分析（火腿）的方法用于获得速度场的表达式以及温度曲线。图表被描绘为不同的参数值，并详细分析，以便改造的动态属性，尤其是粘度依赖参数，CF参数和膨胀比。 CF参数升级下墙附近的流体的速度，但在中途之后，它开始减少。由于温度依赖性（TD）粘度参数引起的流体速度对牛顿流体（NF）相对于非牛顿（NN）流体而言更加值得注意。如预期一样，辐射参数导致流体加热。

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