Flow instabilities and reversals in non-uniformly thermocapillary driven melt pool

Title

Flow instabilities and reversals in non-uniformly thermocapillary driven melt pool

 Author

Kidess, A.
Kenjeres, S.
Kleijn, C.R.

Faculty

Applied Sciences

 Department

Chemical Engineering

 Date

2015-08-28

 Abstract

With transient LES and DNS simulations, we investigate flow in melt pools driven by thermocapillary forces. The developing pool is at first axisymmetric as are the boundary conditions, but flow instabilities arise that lead to 3D oscillatory flow patterns. At higher laser powers a sign-change in the surface tension temperature coefficient occurs, resulting in a flow reversal in the pool and thus two counter-rotating vortices, which exhibit similar though more complex flow instabilities.

 To reference this document use:

http://resolver.tudelft.nl/uuid:641cc5a0-8f19-491f-b607-60c267349473

 Source

15th European Turbulence Conference 2015 (ETC15), August 25-28th, 2015, Delft, The Netherlands

 Part of collection

Institutional Repository

 Document type

conference paper

 Rights

(c) 2015 the Authors
Files
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