Thermofluids question HELP asap!!! 1. The problem statement, all variables and given/known data I would like to know what forces acting and a transition from laminar to turbulent flow is faced. Also what factors affecting the transition? 3. The attempt at a solution In my opinion the possible forces which acting on a pipe wall is the friction force. Also i think the factors which causing this, is the high velocity which means high Reynolds number and therefore turbulent flow but i don't believe that this is the explanation for this. Any help???? Cheers !!