Abstract
The calculation tool ComFLOW, developed at the University of Groningen, is traditionally used to compute forces that result from wave impacts on offshore construction, whether it is a dike or the deck of a ship. ComFLOW is therefore a promising tool for engineers working in the offshore industry and having an interest in computing forces due to fluid flow phenomena.
This thesis describes how the software tool ComFLOW can be extended to model the more subtle viscous effects that appear in fluid flows. Firstly, the forces acting on arbitrarily shaped objects that are immersed in a rectangular computational grid need to be accurately computed. In this thesis the range of applicability of existing models is extended and the resulting method is verified. Secondly, the physical phenomenon of turbulence is modelled. Several approaches to turbulence modelling are presented, derived, compared and verified. Finally, the combined methodology to modelling viscous flow effects that has been implemented in ComFLOW is validated for the phenomenon of sloshing water motion in specific ship hull openings, socalled moonpools.
This thesis describes how the software tool ComFLOW can be extended to model the more subtle viscous effects that appear in fluid flows. Firstly, the forces acting on arbitrarily shaped objects that are immersed in a rectangular computational grid need to be accurately computed. In this thesis the range of applicability of existing models is extended and the resulting method is verified. Secondly, the physical phenomenon of turbulence is modelled. Several approaches to turbulence modelling are presented, derived, compared and verified. Finally, the combined methodology to modelling viscous flow effects that has been implemented in ComFLOW is validated for the phenomenon of sloshing water motion in specific ship hull openings, socalled moonpools.
Original language  English 

Qualification  Doctor of Philosophy 
Awarding Institution 

Supervisors/Advisors 

Award date  22Mar2019 
Place of Publication  [Groningen] 
Publisher  
Print ISBNs  9789403411958 
Electronic ISBNs  9789403411941 
Publication status  Published  2019 