I know that in bigger pipes, Reynolds number and the dominant flow regime can be important in further decisions. Now, I have an application with tubing of about 0.5 mm in diameter and a flow rate of 70 µL / min at maximum.
When calculating Reynolds number, this would lead to values that suggest a mix of laminar and turbulent flow. But is this still relevant information for such small tubing? Or is the flow so low that this does not really apply anymore?