An Experimental Validation Study on Ferrofuid Evaporation  

作　　者：Wenjuan Yu Decai Li Sifang Niu 

机构地区：[1]School of Mechanical Electronic and Control Engineering,Beijing Jiaotong University,Beijing 100044,China [2]State Key Laboratory of Tribology,Tsinghua University,Beijing 100084,China

出　　处：《Chinese Journal of Mechanical Engineering》2022年第4期159-168,共10页中国机械工程学报（英文版）

基　　金：Supported by National Natural Science Foundation of China(Grant Nos.51735006,51927810,U1837206);Beijing Municipal Natural Science Foundation of China(Grant No.3182013).

摘　　要：The current research on the evaporation of ferrofuids mainly focuses on the characterization of ultra-low vapor pressure ferrofuids in vacuum and the theoretical analysis of the evaporation process.Few studies have focused on the experimental validation of the proposed evaporation rate equations and on the comparison of the diferences in ferrofuid evaporation.In this study,based on the Bolotov’s model,an evaporation rate equation is deduced from the experimental model.The experimental study included a comparison of the evaporation,magnetic particle volume fraction,temperature,height of the fuid surface from the outlet,and magnetic feld of a kerosene-based ferrofuid and its base carrier liquid.The prepared sample was evaporated in a test tube,and the evaporation rate was calculated by measuring the weight loss of the sample.The experimental results show that the evaporation rate of the base carrier liquid is higher than that of the ferrofuid.The smaller the volume fraction of the magnetic particles,the greater the evaporation rate.The magnetic particles play a key role in preventing evaporation of the base liquid.The higher the temperature,the smaller the deviation of the evaporation rate from the predicted value.The evaporation rates obtained by the two control groups at the height of the fuid surface from the outlet were lower than the predict value.The magnetic feld had a certain promotional efect on the evaporation of the ferrofuid.The experimental results were consistent with the results obtained using Bolotov’s model.This research validates Bolotov’s model and shows that the model is somewhat biased but still responds well to diferent variables.

关 键 词：Evaporation rate Experimental study Ferrofuid KEROSENE Magnetic feld VALIDATION 

分 类 号：TB34[一般工业技术—材料科学与工程]