The present article is concerned with the heat transfer of nanofluid saturated with porous medium sandwiched between clear viscous fluid filled in a vertical channel. The model is developed to analyze the behavior of nanofluids taking into account the solid volume fraction. The governing equations are obtained based on the Darcy׳s law for the porous medium and Tiwari and Das model to define the nanofluid. The viscous and Darcy dissipation terms are included in the energy equation. The transformed dimensionless governing equations are solved analytically using regular perturbation. Investigations are carried out on the flow characteristics for different values of Grashof number, Brinkman number, solid volume fraction and porous parameter using water as base fluid and copper as nanoparticle. Flow and heat transfer are also observed using five different types of nanoparticles. It is found that the maximum value of Nusselt number is obtained for silver nanoparticle.

本文涉及用多孔介质饱和的纳米流体的传热，该多孔介质夹在填充在垂直通道中的透明粘性流体之间。开发该模型以考虑固体体积分数来分析纳米流体的行为。根据达西定律为多孔介质和Tiwari和Das模型定义纳米流体，获得了控制方程。粘性和达西耗散项包含在能量方程中。变换后的无量纲控制方程使用规则扰动进行解析求解。以水为基础液，铜为纳米颗粒，研究了不同Grashof值，Brinkman值，固体体积分数和多孔参数的流动特性。还使用五种不同类型的纳米粒子观察到了流动和传热。发现银纳米粒子获得了努塞尔数的最大值。