The present paper presents a numerical investigation treating the fluid-structure interaction during CNT-water nanofluid mixed convection in a micro-channel equipped with elastic fins. A numerical framework for simulating the fluid–structure interaction is proposed by using the Finite Element Method (FEM) in COMSOL Multiphysics. To prepare the numerical model, the micro-channel boundaries are considered as rigid, and the fins are elastic. Under periodic fully developed inlet boundary condition the effects of CNT volume fraction and the average inlet velocity on the flow structure, temperature field, heat transfer, drag and lift coefficients are studied. Results highlight the major effect of the fin oscillations to reduce the lift and drag forces and to improve the heat transfer and cooling the outlet flow from the cylindrical micro-channel. The dispersion of CNT nanoparticles in water-based fluid enhances considerably the convection process. In fact, it is remarked that due to the high thermal conductivity of CNT-water nanofluid the Nusselt number increases for higher CNT concentration especially for higher inlet velocities.

本文介绍了在配备弹性翅片的微通道中处理 CNT-水纳米流体混合对流过程中流固耦合的数值研究。使用 COMSOL Multiphysics 中的有限元方法 (FEM) 提出了用于模拟流固耦合的数值框架。为了准备数值模型，微通道边界被认为是刚性的，而翅片是弹性的。在周期性完全发展的入口边界条件下，研究了碳纳米管体积分数和平均入口速度对流动结构、温度场、传热、阻力和升力系数的影响。结果突出了翅片振荡对降低升力和阻力以及改善传热和冷却圆柱形微通道出口流的主要影响。CNT纳米颗粒在水基流体中的分散显着增强了对流过程。事实上，值得注意的是，由于 CNT-水纳米流体的高导热性，当 CNT 浓度较高时，尤其是入口速度较高时，努塞尔数会增加。