UP researchers awarded fellowship from University of Bayreuth, Germany.

Posted on February 24, 2023

Dr Marilize Everts was selected as a Junior Fellow at the University of Bayreuth’s Alexander von Humboldt Centre of International Excellence.  These fellowships are awarded to renowned scientists working at universities abroad to carry out a research project in close cooperation with Bayreuth scientists. 

The seventh Sustainable Development Goal (SDG) is to ensure access to affordable, reliable, sustainable, and modern energy for all, but unfortunately, South Africa is facing an energy crisis. Renewable energy technologies have been prioritised and the aim is to contribute 42% of the country’s energy mix by 2030. Accurate design information and correlations are key to optimise the heat exchangers and contribute to achieve this goal. Extensive research has been done on single-phase flow through tubes heated with a constant heat flux, but gaps in literature exist when it comes to tubes with a constant surface temperature along the length.  Nucleate pool boiling is known for its high heat transfer coefficients and can be implemented to maintain a constant surface temperature boundary condition.  However, the prediction of pool boiling mechanisms remains complex due to the bubble growth being very fast, the interaction of bubbles with the surface and liquid, as well as the interaction of bubbles with each other.  This research aims to experimentally investigate the bubble dynamics during pool boiling in order to maintain a constant surface temperature along the length of a submerged tube.  During her 6-month stay, Dr. Everts will intensively study the bubble dynamics of nucleate pool boiling. After the fellowship, she will use the knowledge gained in Bayreuth in her research activities at the University of Pretoria.

Dr Marilize Everts receiving a certificate to recognize the fellowship awarded, from Prof. Dr. Stefan Leible, the president of the University of Bayreuth.


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