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Experimental and numerical study of Pool boiling and critical heat flux enhancement using water based silica Nanofluids
Heat and Mass Transfer ( IF 2.2 ) Pub Date : 2021-03-18 , DOI: 10.1007/s00231-021-03047-4
Shariq Zafar , Md Adil , Md. Azhar , M. Altamush Siddiqui

Experimental and Numerical Studies on saturated pool boiling have been carried out over a nichrome wire submerged in both distilled water and silica–water based nanofluids. The concentrations of the silica nanoparticles are varied from 0.01 vol.% to 0.05 vol.% in step size of 0.01. Numerical simulation has been carried out by using Mixture Multiphase Approach. Moreover, heat flux values by applying traditional Rohsenow correlation and the surface-liquid constant (Csf) for wire and nanofluids is proposed that fits the experimental as well as numerical data. From the present work, it is inferred that the numerical solutions are in good agreement with the experimental data. Furthermore, thin nanoparticle coatings on heating surface were observed after each experiment. Critical Heat Flux enhancement in nanofluids may be due to the deposition of nanoparticles over the heater surface. Also, the Critical Heat Flux of nanofluids was found to be 38.5% higher (at 0.03 vol.% of silica nanoparticles concentration) as compared to distilled water.



中文翻译:

水基二氧化硅纳米流体增强池沸腾和临界热通量的实验和数值研究

已经对浸没在蒸馏水和二氧化硅水基纳米流体中的镍铬合金丝进行了饱和池沸腾的实验和数值研究。二氧化硅纳米粒子的浓度以0.01步长在0.01体积%至0.05体积%之间变化。使用混合多相法进行了数值模拟。此外,通过应用传统的Rohsenow相关性和表面液常数(C sf)提出了适用于线材和纳米流体的),它适合于实验数据和数值数据。从目前的工作中可以推断出数值解与实验数据吻合良好。此外,在每个实验之后观察到加热表面上的薄纳米颗粒涂层。纳米流体中临界热通量的提高可能是由于纳米颗粒在加热器表面的沉积所致。另外,发现与蒸馏水相比,纳米流体的临界热通量高出38.5%(在二氧化硅纳米颗粒浓度为0.03vol。%时)。

更新日期:2021-03-18
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