Makhdoum Basim M, Mahmood Zafar, Khan Umar, Fadhl Bandar M, Khan Ilyas, Eldin Sayed M
Mechanical Engineering Department, College of Engineering and Islamic Architecture, Umm Al-Qura University, P. O. Box 5555, Makkah 21955, Saudi Arabia.
Department of Mathematics and Statistics, Hazara University, Mansehra, Pakistan.
Heliyon. 2023 Mar 31;9(4):e15012. doi: 10.1016/j.heliyon.2023.e15012. eCollection 2023 Apr.
Nanofluids with aggregation effects mediated by nanoparticles, like geothermal panels and crossflow heat exchangers, ignite new industrial interests. Polymer and conversion processes have transport phenomena in the stagnation zone that must be continuously improved to raise the process quality standard.
Hence, the current computational study examines a nanofluid's unsteady stagnation-point flow performance via a shrinking horizontal cylinder. In addition, the effects of a magnetic field, joule-heating viscous dissipation, nanoparticles aggregation and mass suction on the boundary layer flow are reflected.
ology: The RK-IV with shooting method is applied to resolve the simplified mathematical model numerically in computing software MATHEMATICA. In certain circumstances, comparing the current and prior findings indicates good agreement with a relative error of around 0%.
The implementation of a heat transfer operation may be improved by increasing suction settings. Unsteadiness, nanoparticle volume fraction, magnetic, curvature, and Eckert number (implies the operating Joule heating and viscous dissipation) all influence heat transfer rate. The velocity and temperature profiles both increase as the unsteadiness, magnetic field, and nanoparticle volume fraction parameters increase, whereas the curvature and suction parameters show the opposite behavior. When the values of the suction parameters were changed from 2.0 to 2.5 with = 0.01, the heat transfer rates rose by 4.751%. A comparison shows that the model with aggregation has a better velocity profile, while the model without aggregation has a better temperature profile.
具有由纳米颗粒介导的聚集效应的纳米流体，如地热板和错流换热器，引发了新的工业兴趣。聚合物和转化过程在滞流区存在传输现象，必须不断改进以提高过程质量标准。
因此，当前的计算研究通过收缩水平圆柱来研究纳米流体的非定常驻点流动性能。此外，还反映了磁场、焦耳热粘性耗散、纳米颗粒聚集和质量抽吸对边界层流动的影响。
采用带打靶法的四阶龙格-库塔法在计算软件MATHEMATICA中对简化的数学模型进行数值求解。在某些情况下，将当前结果与先前结果进行比较，结果显示两者吻合良好，相对误差约为0%。
通过增加抽吸设置可以改善传热操作。非定常性、纳米颗粒体积分数、磁场、曲率和埃克特数（意味着运行中的焦耳热和粘性耗散）都会影响传热速率。随着非定常性、磁场和纳米颗粒体积分数参数的增加，速度和温度分布均增大，而曲率和抽吸参数则表现出相反的行为。当抽吸参数的值从2.0变为2.5且α = 0.01时，传热速率提高了4.751%。比较表明，具有聚集的模型具有更好的速度分布，而无聚集的模型具有更好的温度分布。
