What is the diff. between counter and co-current flow

The flow is studied in liq-liq extraction etc.

Your Answer

co-current flow is the flow in which both the fluid streams enter the equipment in the same direction whereas for in the counter-current flow the streams enter at opposite ends of the equipments. In Chemical engineering most of the operations are counter-current in nature because,  the mass transfer or heat transfer will be maximum in the counter-current flow. Co-current flow is preferred in rare cases of heat transfer where a quick heat transfer is required. 

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