SiO_2纳米流体射流冲击泡沫金属强化传热数值模拟

Numerical simulation of enhanced heat transfer of foam metal subjected to jet impinging of SiO_2-water nanofluid

射流冲击拥有强化传热作用,被广泛应用在各个科技领域,而泡沫金属与纳米流体对强化传热起到有利作用。为分析SiO_2纳米流体射流冲击泡沫金属强化传热作用,在计算流体力学(CFD)基础上,通过数值模拟方法对影响传热的一些因素进行分析,通过改变雷诺数(Re)、纳米流体体积分数(ψ)、泡沫金属孔隙率(φ)和高度(H)来分析不同影响因素对表面传热系数的影响。

With its enhancing performance for heat transfer, jet impingement has been widely applied in many technical fields, while the introduction of foam metal and nanofluid generates benefit for enhanced heat transfer as well. To investigate the heat transfer property of jet impinging of SiO2 - water nanofluid on foam metal, the present study numerically analyzed the factors impacting heat transfer based on Computational Fluid Dynamics （CFD）. The local heat transfer coefficient （h） was studied through varying Reynolds number （ Re）, volume fraction （ψ） of nanofluid, porosity （φ） and thickness （H） of foam mental.