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Professor Anastasios Georgoulas gives seminar at IN+ 19-10-2017


Lab_Seminar

Professor Anastasios Georgoulas will give a seminar on October 19th at IN+ on the topic of "Enhanced VOF Simulations for two-phase flows with phase change".

We look forward to seeing you there!

For more information, please contact Dr Ana Moita, at: anamoita@tecnico.ulisboa.pt


Enhanced VOF Simulations for two-phase flows with phase change

October 19th, 14H00-16H00
DEM Meeting Room, Mechanics Pavilion III


Summary

Electronic components in various technological applications (e.g. smart TVs, mobile phones, tablets, laptops, PCs, cars, aircrafts, cube satellites) generate excess heat. Thus, efficient thermal management is required to improve their reliability and prevent premature failure. As technology progresses, electronic components become progressively smaller and more powerful. Therefore, progressively higher amounts of heat need to be dissipated, in progressively smaller spaces. Devices that utilise conventional heat transfer mechanisms (e.g. forced air/water convection cooling), fail to meet this trend. Due to the encountered high heat transfer rates, heat transfer devices that rely in phase-change of a working fluid (boiling and/or condensation), are utilised instead. The deep understanding of the associated phase-change processes in such cases, is therefore of vital importance. Due to the underlying complexity, there are still many aspects of phase-change heat transfer that are not fully understood. Apart from the availability of highly resolved laboratory experiments, the numerical modeling of phase change heat transfer has also been established in the last decades. However, the currently existing numerical models and techniques suffer from restrictions and/or simplifications. The present lecture will demonstrate the development, validation and various applications of an enhanced “Direct Numerical Simulation (DNS)” model for adiabatic and diabatic interfacial phenomena with phase change due boiling/condensation that has been developed within the general framework of OpenFOAM, an openSource CFD platform. The proposed Computational Fluid Dynamics (CFD) model is based in an algebraic Volume Of Fluid (VOF) method that has been improved to filter out spurious numerical defects and also be able to account for two-phase heat transfer with phase change as well as for conjugate heat transfer between solid and fluid domains.


About the Speaker

Professor Anastasios GeorgoulasProfessor Anastasios Georgoulas from the University of Brighton (bio) is a close collaborator of IN+ research groups.

Dr Georgoulas is an Engineer devoted to Computational Fluid Dynamics (CFD), and in particular to the simulation of multi-phase flows, with specific interest in thermal management (boiling and cavitation, heat pipes) and Liquid Interface and Spray dynamics (droplet and bubble dynamics).