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  2. Countercurrent exchange - Wikipedia

    en.wikipedia.org/wiki/Countercurrent_exchange

    For example, this could be transferring heat from a hot flow of liquid to a cold one, or transferring the concentration of a dissolved solute from a high concentration flow of liquid to a low concentration flow. The counter-current exchange system can maintain a nearly constant gradient between the two flows over their entire length of contact ...

  3. 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 ...

  4. Equatorial Counter Current - Wikipedia

    en.wikipedia.org/wiki/Equatorial_Counter_Current

    The Equatorial Counter Current is an eastward flowing, wind-driven current which extends to depths of 100–150 metres (330–490 ft) in the Atlantic, Indian, and Pacific Oceans. More often called the North Equatorial Countercurrent (NECC) , this current flows west-to-east at about 3-10°N in the Atlantic , Indian Ocean and Pacific basins ...

  5. Countercurrent distribution - Wikipedia

    en.wikipedia.org/wiki/Countercurrent_distribution

    Countercurrent distribution (CCD, also spelled "counter current" distribution) is an analytical chemistry technique which was developed by Lyman C. Craig in the 1940s. [1] ...

  6. Logarithmic mean temperature difference - Wikipedia

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

    In thermal engineering, the logarithmic mean temperature difference (LMTD) is used to determine the temperature driving force for heat transfer in flow systems, most notably in heat exchangers. The LMTD is a logarithmic average of the temperature difference between the hot and cold feeds at each end of the double pipe exchanger.

  7. Counter-current flow - Wikipedia

    en.wikipedia.org/?title=Counter-current_flow&...

    To a related topic: This is a redirect to an article about a similar topic.. Redirects from related topics are different than redirects from related words, because a related topic is more likely to warrant a full and detailed description in the target article.

  8. Skin effect - Wikipedia

    en.wikipedia.org/wiki/Skin_effect

    Distribution of current flow in a cylindrical conductor, shown in cross section. For alternating current , current density decreases exponentially from the surface towards the inside. Skin depth, δ, is defined as the depth where the current density is just 1/e (about 37%) of the value at the surface; it depends on the frequency of the current ...

  9. Countercurrent chromatography - Wikipedia

    en.wikipedia.org/wiki/Countercurrent_chromatography

    A high-performance countercurrent chromatography system. Countercurrent chromatography (CCC, also counter-current chromatography) is a form of liquid–liquid chromatography that uses a liquid stationary phase that is held in place by inertia of the molecules composing the stationary phase accelerating toward the center of a centrifuge due to centripetal force [1] and is used to separate ...