非牛顿流体中运动气泡的形变  

Deformation of moving bubble in non-Newtonian fluid

作　　者：姜韶堃[1] 马友光[2] 陶志勇[1] 

机构地区：[1]中国船舶重工集团公司第七一八研究所,河北邯郸056027 [2]天津大学化工学院化学工程联合国家重点实验室,天津300072

出　　处：《舰船科学技术》2010年第12期38-41,共4页Ship Science and Technology

摘　　要：为阐明非牛顿流体中运动气泡的形变规律,采用高速摄像仪对运动气泡图像进行了捕捉,根据气泡形变参数变化分析了气泡形变规律。结果表明,流体黏度对气泡形变影响很大。低表观黏度流体中,气泡表现出振荡形变现象,其宽高比随高度也产生了较强的振荡变化,具有明显的特征振荡频率;高表观黏度流体中,气泡宽高比随高度体现出近似的线性变化,气泡呈椭球形。与牛顿流体中的气泡形变不同,非牛顿流体中的局部黏度变化对气泡振荡形变起重要作用,气泡振荡频率随黏度振荡频率的改变而改变。To clarify the deformation rule of a moving bubble in non-Newtonian fluid,the images of a moving bubble were captured using a high speed camera.The rules of bubble deformation were analyzed according to the variations of parameters of bubble deformation.The results show that the viscosity of fluid had large effects on bubble deformation.In the fluid with low apparent viscosity,an oscillating deformation of bubble was displayed and the variation of bubble aspect ratio with height also exhibited a strongly oscillation with an obvious characteristic oscillating frequency;however,in the fluid with high apparent viscosity,an approximate linear change was reflected in the variation of bubble aspect ratio with height and bubble appeared ellipsoidal.Different with bubble deformation in Newtonian fluid,the variation of local viscosity in non-Newtonian fluid played a major role in bubble oscillating deformation,and bubble oscillating frequency changed with viscosity oscillating frequency.

关 键 词：气泡 非牛顿流体 形变 振荡频率 黏度 

分 类 号：TQ021[化学工程]