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Plug Flow

Static mixers, also called motionless mixers, or inliners, have the effect of reducing the velocity difference across a pipe, hence plug flow type.

This type of flow regime can be extremely advantageous when dealing with certain types of reactions, dosing-sampling systems etc.

An ideal plug flow reactor assumes ideal mixing (red line), where no back mixing occurs. Backmixing is more common in a stirred tank reactor utilizing a dynamic mixer.   


Diagram of flow in an empty pipe verses a plug flow created by a static mixer(inliner).

Pictorial of the effect of successive elements splitting and blending the flow until a homogeneous mixture is achieved.