Transport Phenomena for Falling Liquid Film Process: Coating Configurations Effect
A specific coating was sprayed on the external surface of brass tube with design surface division form. The characteristics of heated liquid films flowing over a vertical coated division tube were experimentally investigated with a highly sensitive infrared camera, THERMOVISION? A40. For different flow conditions, the temperature fluctuation and the flow patterns of falling film were determined. It was found that the temperature fluctuation on the coated division tube was larger than that on the smooth tube. The disturbance of falling liquid film was strengthened from the existence of a surface tension gradient that was induced by the coated region, resulting in stronger mixing occurred and drove the liquid particles from internal of liquid film to surface. The interfacial effect could therefore strongly affect the flow characteristic and thus the transfer process of falling liquid films.
Coated division tube Interface effect Wavy liquid film Infrared thermography
X.H.Ma Q.C.Wang Z.Lan J.B.Chen T.Bai
Institute of Chemical Engineering, Dalian University of Technology, Dalian, China
国际会议
西安
英文
525-530
2009-07-11（万方平台首次上网日期，不代表论文的发表时间）