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Pool boiling heat transfer of water and nanofluid outside the surface with higher roughness and different wettability
Nanoscale and Microscale Thermophysical Engineering ( IF 4.1 ) Pub Date : 2018-09-07 , DOI: 10.1080/15567265.2018.1497110 Wen-Tao Ji 1 , Peng-Fei Zhao 1 , Chuang-Yao Zhao 1 , Jing Ding 1 , Wen-Quan Tao 1
Nanoscale and Microscale Thermophysical Engineering ( IF 4.1 ) Pub Date : 2018-09-07 , DOI: 10.1080/15567265.2018.1497110 Wen-Tao Ji 1 , Peng-Fei Zhao 1 , Chuang-Yao Zhao 1 , Jing Ding 1 , Wen-Quan Tao 1
Affiliation
ABSTRACT In order to investigate the effect of surface wettability on the pool boiling heat transfer, nucleate pool boiling experiments were conducted with deionized water and silica based nanofluid. A higher surface roughness value in the range of 3.9 ~ 6.0μm was tested. The contact angle was from 4.7° to 153°, and heat flux was from 30kW/m2 to 300kW/m2. Experimental results showed that hydrophilicity diminish the boiling heat transfer of silica nanofluid on the surfaces with higher roughness. As the increment of nanofluid mass concentration from 0.025% to 0.1%, a further reduction of heat transfer coefficient was observed. For the super hydrophobic surface with higher roughness (contact angle 153.0°), boiling heat transfer was enhanced at heat flux less than 93 kW/m2, and then the heat transfer degraded at higher heat flux.
中文翻译:
表面外水和纳米流体的池沸腾传热具有更高的粗糙度和不同的润湿性
摘要 为了研究表面润湿性对池沸腾传热的影响,使用去离子水和二氧化硅基纳米流体进行了核池沸腾实验。测试了 3.9 ~ 6.0μm 范围内的较高表面粗糙度值。接触角从4.7°到153°,热通量从30kW/m2到300kW/m2。实验结果表明,亲水性降低了二氧化硅纳米流体在粗糙度较高的表面上的沸腾传热。随着纳米流体质量浓度从 0.025% 增加到 0.1%,传热系数进一步降低。对于具有较高粗糙度(接触角 153.0°)的超疏水表面,在热通量小于 93 kW/m2 时沸腾传热增强,然后在更高热通量时传热降低。
更新日期:2018-09-07
中文翻译:
表面外水和纳米流体的池沸腾传热具有更高的粗糙度和不同的润湿性
摘要 为了研究表面润湿性对池沸腾传热的影响,使用去离子水和二氧化硅基纳米流体进行了核池沸腾实验。测试了 3.9 ~ 6.0μm 范围内的较高表面粗糙度值。接触角从4.7°到153°,热通量从30kW/m2到300kW/m2。实验结果表明,亲水性降低了二氧化硅纳米流体在粗糙度较高的表面上的沸腾传热。随着纳米流体质量浓度从 0.025% 增加到 0.1%,传热系数进一步降低。对于具有较高粗糙度(接触角 153.0°)的超疏水表面,在热通量小于 93 kW/m2 时沸腾传热增强,然后在更高热通量时传热降低。