# Virtual Study Group Trial Document - Breakout Room 2 > Participants - Chris, Dave and Ian > This was a very useful exercise - so how did we manage? --- Here is a brief summary of our conclusions - * We should use HackMD to write up our collective thoughts * We should use Whiteboardfox for hand written diagrams, which can then be put into Hack MD * We shouldn't always use Mural as someimes it won't be that useful for our purposes and people have to sign up! --- * Zoom is good - it is the main route for communication within breakout rooms * We can share picture (jpeg, png etc.) files within HackMD by dragging and dropping * There is no facility for exchanging or posting pdfs that we know of via zoom, hackMD and whiteboardfox combined at present - although Ian suggested that this should be available within zoom. --- Thoughts on the problem itself * Size of the particles and the big ones shaken to the top (Brazil nut) * Not granular .. interlocking particles * What is the Re of the likely flow * Vibrational characteristics of the vehicle * Caking for granular solids eg. washing powders? * Liquid leaving under vibration * Shaking table * Megan Povey, Leeds * Size of the container ---  --- $$x = 23 + \sin(x)$$ \begin{equation} x^2=2 \end{equation} $$\int x \; dx = x^2/2 + C$$ ---  ---  ---