Local film thickness and temperature distribution measurement in wavy liquid films with a laser-induced luminescence technique

被引：49

作者：

Schagen, A. ^{[1
]}

Modigell, M. ^{[1
]}

机构：

[1] Rhein Westfal TH Aachen, Dept Chem Engn, Chair Mech Unit Operat, D-5100 Aachen, Germany

来源：

EXPERIMENTS IN FLUIDS | 2007年 / 43卷 / 2-3期

关键词：

D O I：

10.1007/s00348-007-0289-z

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 [机械工程];

摘要：

Heat transfer in falling liquid film systems is enhanced by waviness. Comprehension of the underlying kinetic phenomena requires experimental data of the temperature field with high spatiotemporal resolution. Therefore a non-invasive measuring method based on luminescence indicators is developed. It is used to determine the temperature distribution and the local film thickness simultaneously. Results are presented for the temperature distribution measurement in a laminar-wavy water film with a liquid side Reynolds number of 126 flowing down a heated plane with an inclination angle of 2 degrees at two positions in flow direction. The measured temperature distributions are used to calculate the local heat transfer coefficient for solitary waves at two positions in flow direction.

引用

页码：209 / 221

页数：13

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