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Drazen (Mechanical) 5 Nov 16 15:49
i'm curious that cfd can be put to use for the one-branch problem, but in this particular case cfd will not help you, you need to calculate the whole network, not flow in one spot.
what you deem as "having detailed calculation for each branch"? in hvac practice that would mean "having detailed calculation for each flow path", but as it is seemingly not your expertise you may mean something different.
balancing has to be conducted for each and every path on the network, not for one branch only. after all paths are calculated, results need to show which balancing element can be used for which node, based on calculated balancing pressures for paths. you need hvac engineer for all that job.