ISSN Online: 2377-424X
ISBN Print: 978-1-56700-421-2
International Heat Transfer Conference 15
Study on Liquid Film Thickness of Accelerated Slug Flow in Micro Tubes
Abstract
Liquid film in a slug flow plays an important role in heat exchangers and chemical reactors, since local heat
and mass transfer is effectively enhanced at the thin liquid film region. To develop precise heat transfer
models for micro-scale two phase flows, it is crucial to predict liquid film thickness accurately around the
confined bubble. In this work, the liquid film thickness in accelerated flow under the adiabatic condition is
investigated experimentally and numerically considering the initial steady flow velocity. The experimental
study uses laser focus displacement meter to measure the liquid film thickness, and water is used as a
working fluid. The effect of the initial flow velocity on the initial liquid film thickness is discussed. The
numerical study employs Phase-Field method to capture the interface in micro tube slug flows. Flow fields
of steady and accelerated flows are investigated from the numerical result.