Picture offshore wind farm

Open Access: World leading research into plasma physics...

Strathprints makes available scholarly Open Access content by researchers in the Department of Physics, including those researching plasma physics.

Plasma physics explores the '4th' state of matter known as 'plasma'. Profound new insights are being made by Strathclyde researchers in their attempts to better understand plasma, its behaviour and applications. Areas of focus include plasma wave propagation, non-linear wave interactions in the ionosphere, magnetospheric cyclotron instabilities, the parametric instabilities in plasmas, and much more.

Based on the REF 2014 GPA Scores, Times Higher Education ranked Strathclyde as number one in the UK for physics research.

Explore Open Access plasma physics research and of the Department of Physics more generally. Or explore all of Strathclyde's Open Access research...

The Unsteady expansion and contraction of a two-dimensional vapour bubble confined between superheated or subcooled plates

Das, K.S. and Wilson, S.K. (2004) The Unsteady expansion and contraction of a two-dimensional vapour bubble confined between superheated or subcooled plates. In: 57th Annual Meeting of the Division of Fluid Dynamics, 2004-11-21 - 2004-11-23.

Full text not available in this repository. Request a copy from the Strathclyde author


This talk describes the results of a theoretical investigation of the unsteady expansion and contraction of a vapour bubble in a narrow channel. Specifically we construct and analyse a mathematical model for a long, two-dimensional bubble confined between superheated or subcooled parallel plates, whose motion is driven by mass transfer between the liquid and the vapour. The present model is similar to that previously proposed by Wilson, Davis and Bankoff (1999), but differs from it in one crucial respect, namely that, unlike the earlier work, it includes significant mass transfer from and/or to the semi-circular cap regions at the nose of the bubble as well as from and/or to the thin liquid films attached to the plates. The inclusion of this additional contribution to the overall mass transfer significantly alters the dynamics of the bubble. When both plates are superheated the bubble always expands. In this case there are two possible constant-velocity travelling-wave solutions for the expansion of the bubble, namely an unstable fast mode and a stable slow mode. The evolution of the bubble is calculated numerically for a range of values of the parameters. In particular, these calculations show that eventually the bubble expands either with the constant velocity of the slow mode or exponentially. When both plates are subcooled the bubble always collapses to zero length in a finite time.When one plate is subcooled and the other plate is superheated the situation is rather more complicated.