countercurrent flow


Also found in: Encyclopedia.

count·er·cur·rent flow

(kownt'ĕr-kŭr'ĕnt flō)
Flow in the opposite direction to slice excitation during magnetic resonance imaging.
References in periodicals archive ?
In this case, since every heat exchanger works at true countercurrent flow, in each one of these graphs the inlet point of one fluid will be the exit point of the other fluid.
The product from the reactor was de-ashed through a set of de-ashing vessels in which the hydrocarbon stream was contacted in countercurrent flow with water.
Furthermore, the wastewater was sprayed from the top of the O3 reactor and contacted with ozone by countercurrent flow.
Countercurrent flow is used by most of the freshwater fishes to increase the uptake of oxygen.
In countercurrent flow, the water and oil flow through the same face in opposite direction.
With the usual countercurrent flow of dialysate, the hydrostatic, osmotic, and oncotic pressure in the proximal end of the dialyzer draws the substances from the blood to the dialysate.
0 during the onset of the countercurrent flow at the vent.
Because the BMLC is located at a faunal boundary, vicissitudes in the CCS greatly affect the species composition and relative abundance of the local ichthyofauna, with temperate species becoming more pronounced in times of strong California Current flow or upwelling and less common during strong Countercurrent flow or during ENSO warming events (Torres-Orozco and Castro-Aguirre 1992; Castro-Aguirre and Torres-Orozco 1993; Gutierrez-Sanchez 1997).
The bloodstream returning to the heart is cooled by the countercurrent flow of saline solution in the balloon catheter.
Cooling towers readily generate fine water droplets, as they operate by spraying water onto a packing material through which there is a countercurrent flow of air.
While conventional wet scrubbers use a countercurrent flow, in which the flue gas rising from the base of the scrubber passes upward through the falling slurry spray, the Pure Air version uses a high-velocity, co-current flow.