This paper aims to investigate the influences of variable viscosity and thermal conductivity on peristaltic flow of Carreau–Yasuda nanofluid in a 2D tapered asymmetric channel. Viscosity is considered as a function on the temperature of the fluid. Consequently, all dimension parameters that are functions of viscosity such as, thermophoresis and Brownian motion, and Prandtl, local temperature, and local nanoparticle Grashof numbers has also been performed as variable within the flow. For the pertinent problem, the flow equations are first established, and then reformulated under the assumption of low Reynolds number and long wavelength. Numerical results have been obtained for the pressure gradient as well as the velocity, temperature, and nanoparticle concentration distributions. Moreover, numerical integration has also been performed to assess the expressions for the pressure rise. It is worth mentioning that increases in the variable viscosity parameter cause diminishes in temperature. Hence, the use of nanofluids with high viscosity is favorable in application of solar energy to get higher performance (by acting as a cooling system for solar cells) and lower operating costs. Increases in Brownian motion and thermophoresis parameters cause better transport of heat, and highly absorption in the solar range.

本文旨在研究可变粘度和热导率对二维锥形非对称通道中 Carreau-Yasuda 纳米流体蠕动流动的影响。粘度被认为是流体温度的函数。因此，作为粘度函数的所有维度参数，例如热泳和布朗运动，以及普朗特、局部温度和局部纳米粒子格拉肖夫数，也作为流动中的变量执行。针对相关问题，首先建立流动方程，然后在低雷诺数和长波长的假设下重新公式化。已经获得了压力梯度以及速度、温度和纳米颗粒浓度分布的数值结果。而且，还进行了数值积分以评估压力上升的表达式。值得一提的是，可变粘度参数的增加会导致温度降低。因此，在太阳能应用中使用具有高粘度的纳米流体有利于获得更高的性能（通过充当太阳能电池的冷却系统）和更低的运营成本。布朗运动和热泳参数的增加会导致更好的热量传输和太阳范围内的高度吸收。使用具有高粘度的纳米流体有利于太阳能应用，以获得更高的性能（通过充当太阳能电池的冷却系统）和更低的运营成本。布朗运动和热泳参数的增加会导致更好的热量传输和太阳范围内的高度吸收。使用具有高粘度的纳米流体有利于太阳能应用，以获得更高的性能（通过充当太阳能电池的冷却系统）和更低的运营成本。布朗运动和热泳参数的增加会导致更好的热量传输和太阳范围内的高度吸收。