Two-Dimenional Three-Regions Rewetting Modelling Using ANSYS
NURETH-14 - 2011 September 25-30

Presented at:
2011 September 25-30
Toronto, Canada
Session Title:
B2-2 Computational Multi-Fluid Dynamics and Validation/Verification/Applications

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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