In this article, laminar convective heat transfer of a confined slot impinging jet with nanofluid has been numerically investigated over Reynolds number ranges of 200–1000. Two circular ribs are mounted on the lower-target surface: one rib located right the stagnation point and another one located on the left of the stagnation point. SiO₂-water nanofluid with nanoparticles volume fraction ranging from 0 to 4% and nanoparticles diameters of 30 nm has been examined. The two-dimensional governing continuity, momentum and energy equations have been solved using finite volume method based on SIMPLE algorithm. The effect of Reynolds number, nanoparticles volume fraction, rib height and rib location on the flow and thermal characteristics are presented and discussed. Results showed that the average Nusselt number, performance factor, total entropy generation as well as friction factor increase with increasing nanoparticles volume fraction. In addition, it is found that the best thermal-hydraulic performance factor is around 1.89 which is obtained at Reynolds number of 1000, nanoparticles volume fraction of 4%, the rib height of 0.1 and the rib location of 2.

在本文中，已经在200–1000的雷诺数范围内对有限狭缝撞击射流与纳米流体的层流对流换热进行了数值研究。在目标下部表面上安装了两个圆形肋：一个肋位于停滞点的右侧，另一个肋位于停滞点的左侧。二氧化硅₂已经研究了纳米粒子体积分数为0至4％，纳米粒子直径为30 nm的水纳米流体。利用基于SIMPLE算法的有限体积法求解了二维控制连续性，动量和能量方程。提出并讨论了雷诺数，纳米颗粒体积分数，肋骨高度和肋骨位置对流动和热特性的影响。结果表明，平均纳塞尔数，性能因子，总熵产生以及摩擦因子随纳米颗粒体积分数的增加而增加。另外，发现最佳的热液压性能因数约为1.89，这是在雷诺数为1000，纳米颗粒体积分数为4％，肋骨高度为0.1和肋骨位置为2时获得的。