PhD Thesis - staffweb - University of Greenwich

PhD Thesis by John Ewer.9 Further work9.1 OverviewDuring these investigations there were many instances of research areas that neededinvestigation or that could be potentially beneficial but these could not be pursued due to timeand resource constraints. This section describes areas of research that need further work.9.2 Dynamic solution controlFurther work is needed for better determination of the current solution status (possibly involvingmore historical solution status information) so that the control rules can be fired in a morereliable way. Also the actions that can be performed need to be extended to cover more of thecapabilities of the CFD software. It is possible that the Dynamic control module would benefitfrom initially using a "Zone model" to determine a "quick and dirty" solution prior to performingthe simulation and to use this data to apply changes to the number of iterations, tolerances,solver types and time step size as required.Furthermore the dynamic control module needs to be "aware" of transitional effects such as there-direction of plumes or flow jets by geometry constraints or the change in height of neutralplane because these changes can greatly effect solution stability and often require specialhandling. There is also the potential for user or solution defined transitional effects such as thebreaking of windows, opening of doors and secondary fire ignition or fire spread that will alsorequire specialised control handling.9.3 VisualisationVisualisation needs to be extended to 3-D for improved run-time assessment of the solutionstatus. This should not be regularly updated, as it is in the current 2-D slice visualiser, because9-125