I am a PhD candidate at NTNU. My project is entitled "Mathematical modelling of two-phase flows and heat transfer in confined geometries". It was initiated 1 September 2010 and should last until 31 August 2013.
About my project
The main objective of my PhD project is to develop fundamental knowledge of two-phase flow phenomena relevant for heat exchangers, and thus LNG-process plants. Such flow phenomena include droplet-film interactions, flows in tubes and manifolds, and flows across tubes. The basic hypothesis is that a greater understanding of the fundamental phenomena may lead to more efficient processes with lower energy consumption and reduced downtime.
My objectives can be summarized as follows:
- Develop a mathematical model formulation for calculating two-phase flow in geometries that are relevant for heat exchangers.
- Implement the mathematical model in a numerical code.
- Verify the implementation with simulations of simple test cases.
- Perform numerical simulations on physically relevant cases.
- Analyse the results of the simulations in step 4 and compare them with experimental results.
Research stay at UCI
As part of the PhD project I visited Professor John Lowengrub at the University of California - Irvine. The main objective of the stay was to focus my research on methods for handling two-phase flows in complex domains. In particular, I studied the diffuse-domain approach, where complex domains are handled implicitly with the use of continuous approximations of the Heaviside function and the delta function.
List of publications
Calculation of interface curvature with the level-set method.
K. Y. Lervåg.
In: MekIT'11 - 6th National Conference on Computational Mechanics. ISBN 978-82-519-2798-7. Preprint.
Sharp interface simulations of surfactant-covered drops in
K. E. Teigen, K. Y. Lervåg and S. T. Munkejord.
In: Fifth European Conference on Computational Fluid Dynamics, ECCOMAS CFD 2010. ISBN 978-989-96778-1-4. Preprint.
Calculation of droplets impinging on a plane surface: Accurate
calculations of interfacial curvature with the level-set method.
K. Y. Lervåg, K. E. Teigen and S. T. Munkejord.
In: First Trondheim Gas Technology Conference, 21-22 October 2009. Presentation.