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A comment on Unimpeded Permeation of Water Through Helium-Leak–Tight Graphene-Based Membranes. Parent comment
With pipes there's a linear (or quadratic for turbulent flow) resistance, low pressure still results in some flow.
With membranes you have a threshold pressure below which you get no flow at all.
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With pipes there's a linear (or quadratic for turbulent flow) resistance, low pressure still results in some flow.
With membranes you have a threshold pressure below which you get no flow at all.