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  2. Countercurrent exchange - Wikipedia

    en.wikipedia.org/wiki/Countercurrent_exchange

    A comparison between the operations and effects of a cocurrent and a countercurrent flow exchange system is depicted by the upper and lower diagrams respectively. In both it is assumed (and indicated) that red has a higher value (e.g. of temperature) than blue and that the property being transported in the channels therefore flows from red to blue.

  3. Logarithmic mean temperature difference - Wikipedia

    en.wikipedia.org/wiki/Logarithmic_mean...

    A is the exchange area. Note that estimating the heat transfer coefficient may be quite complicated. This holds both for cocurrent flow, where the streams enter from the same end, and for countercurrent flow, where they enter from different ends.

  4. Countercurrent multiplication - Wikipedia

    en.wikipedia.org/wiki/Countercurrent_multiplication

    A countercurrent mechanism system is a mechanism that expends energy to create a concentration gradient. It is found widely in nature and especially in mammalian organs. For example, it can refer to the process that is underlying the process of urine concentration, that is, the production of hyperosmotic urine by the mammalian kidney .

  5. Rete mirabile - Wikipedia

    en.wikipedia.org/wiki/Rete_mirabile

    A countercurrent exchange system is utilized between the venous and arterial capillaries. Lowering the pH levels in the venous capillaries causes oxygen to unbind from blood hemoglobin because of the Root effect. This causes an increase in venous blood oxygen partial pressure, allowing the oxygen to diffuse through the capillary membrane and ...

  6. NTU method - Wikipedia

    en.wikipedia.org/wiki/NTU_Method

    The number of transfer units (NTU) method is used to calculate the rate of heat transfer in heat exchangers (especially parallel flow, counter current, and cross-flow exchangers) when there is insufficient information to calculate the log mean temperature difference (LMTD). Alternatively, this method is useful for determining the expected heat ...

  7. Countercurrent - Wikipedia

    en.wikipedia.org/wiki/Countercurrent

    Countercurrent exchange; Countercurrent chromatography; Equatorial Counter Current; Counter-Currents, an alt-right online publication; Countercurrents.org, an Indian news website; two political party factions in Italy: Countercurrent (PRC faction, Italy), a faction of the Communist Refoundation Party; Countercurrent (PdL faction, Italy), a ...

  8. Countercurrent exchange system - Wikipedia

    en.wikipedia.org/?title=Countercurrent_exchange...

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  9. Counter-current heat exchange - Wikipedia

    en.wikipedia.org/?title=Counter-current_heat...

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