When in COMSOL one module affects other how we include those affect in modelling, as in my case I want to add TWO(2), Single phase laminar flows and both streams are mixing after a length, but when I computed the study the result came were for individually each of them i.e velocity for spf and similarly for other velocity spf2....
Do you use time dependent study? You need to provide two time dependent studies for both of your Navier- Stokes equations. For example for the first module add V=10 m/s for the inlet boundary condition and in the place that you insert the information for inlet for your second Laminar flow, write V=10m/s*(T>=2) this way it starts injecting the flow after time 2s for the second module. Now when you simulate both module in one study together, it will consider them both. Anytime that you want to define and if clause type problems in COMSOl use (*(X
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