Conference Proceedings Paper
Two-Dimenional Three-Regions Rewetting Modelling Using ANSYS
NURETH-14 - 2011 September 25-30
Muhammad Ilyas (Pakistan Institute of Engineering and Applied Sciences)
Simon Walker (Imperial College London)
Geoff Hewitt (Imperial College London)
Modelling rewetting processes is a challenging problem. One-dimensional modelling is an over
simplification whereas a mechanistic unsteady three-dimensional modelling presents obvious
difficulties. However, two-dimensional simulation using commercial software has been found to
give reasonable results. This paper describes two-dimensional modelling studies of the rewetting
of a hot plate by a moving liquid film using the ANSYS code. The entire plate is divided into
three regions - namely the wet region, the dry region and the transition region between the wet
and dry regions. In the transition zone, the wetting phenomenon of intermittent contact of water
with metal at high temperature is modelled by imposing a time averaged (over the period of
cycle) heat transfer coefficient in the transition region. The parameters studied are the
intermittent contact frequency, heat transfer coefficient, and the length of intermittent contact
region. The results are in plausible agreement with the experimental data.
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