The heat transfer in flow past thin needle has applications in instruments like hot wire anemometers. The objective of this article is to study the influence of hybrid nanoparticles on heat transfer distribution of the boundary layer flow over a parabolically shaped thin hot needle. The Sakiadis and Blasius 2-D flow scenarios have been analyzed by implementing a mathematical model with the Navier–Stokes and the energy equations. The resulting equations are solved numerically by using a similarity solution technique. This technique results in a differential equation in terms of a single variable, representing the curves parallel to the needle surface. The results show that using distinct nanoparticles allows us to control the heat transfer rate apart from the physical parameters, such as, needle size or velocity ratio parameter. A comparative analysis of Nusselt number, frictional drag, temperature, and velocity profiles for Ag–water nanofluid, Ag–CuO/water hybrid nanofluid, and CuO–water nanofluid has been carried out for different flow conditions, including Sakiadis and Blasius flow. The addition of nanoparticles hikes the heat transfer rate by 27–28% in Blasius flow and 6–8% in Sakiadis flow.

流经细针的热传递已在热线风速计等仪器中得到应用。本文的目的是研究杂化纳米粒子对抛物线形细热针上边界层流的传热分布的影响。通过使用Navier–Stokes和能量方程实现数学模型，对Sakiadis和Blasius二维流动场景进行了分析。通过使用相似性求解技术，可以对所得方程进行数值求解。该技术产生了一个关于单个变量的微分方程，代表与针表面平行的曲线。结果表明，使用不同的纳米粒子可以使我们控制传热速率，而不受物理参数（例如针头尺寸或速度比参数）的影响。针对不同的流动条件（包括Sakiadis和Blasius流），对Ag-水纳米流体，Ag-CuO /水杂化纳米流体和CuO-水纳米流体的努塞尔数，摩擦阻力，温度和速度曲线进行了比较分析。纳米粒子的添加使Blasius流的传热速率提高了27–28％，Sakiadis流的传热速率提高了6–8％。