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  2. Decompression theory - Wikipedia

    en.wikipedia.org/wiki/Decompression_theory

    Gas is breathed at ambient pressure, and some of this gas dissolves into the blood and other fluids. Inert gas continues to be taken up until the gas dissolved in the tissues is in a state of equilibrium with the gas in the lungs (see saturation diving), or the ambient pressure is reduced until the inert gases dissolved in the tissues are at a higher concentration than the equilibrium state ...

  3. Physiology of decompression - Wikipedia

    en.wikipedia.org/wiki/Physiology_of_decompression

    The physiology of decompression is the aspect of physiology which is affected by exposure to large changes in ambient pressure. It involves a complex interaction of gas solubility, partial pressures and concentration gradients, diffusion, bulk transport and bubble mechanics in living tissues. [1]

  4. Thermodynamic model of decompression - Wikipedia

    en.wikipedia.org/wiki/Thermodynamic_model_of...

    Decompression profiles based on the Thermodynamic model compared with the US Navy table for the same depth and bottom time. The thermodynamic model was one of the first decompression models in which decompression is controlled by the volume of gas bubbles coming out of solution. In this model, pain only DCS is modelled by a single tissue which ...

  5. Thermodynamic diagrams - Wikipedia

    en.wikipedia.org/wiki/Thermodynamic_diagrams

    The main feature of thermodynamic diagrams is the equivalence between the area in the diagram and energy. When air changes pressure and temperature during a process and prescribes a closed curve within the diagram the area enclosed by this curve is proportional to the energy which has been gained or released by the air.

  6. Haldane's decompression model - Wikipedia

    en.wikipedia.org/wiki/Haldane's_decompression_model

    Haldane's decompression model is a mathematical model for decompression to sea level atmospheric pressure of divers breathing compressed air at ambient pressure that was proposed in 1908 by the Scottish physiologist, John Scott Haldane (2 May 1860 – 14/15 March 1936), [1] who was also famous for intrepid self-experimentation.

  7. Degassing - Wikipedia

    en.wikipedia.org/wiki/Degassing

    Often, bubbles appears upon melting. The process is typically repeated a total of three cycles. [4] The degree of degassing is expressed by the equation (1/760) 3 for the case of initial pressure being 760 mm Hg, the vacuum being 1 mm Hg, and the total number of cycles being three. [5]

  8. Pressure-temperature-time path - Wikipedia

    en.wikipedia.org/wiki/Pressure-temperature-time_path

    At stage 1 retrograde metamorphism, near-isothermal decompression after the peak, which indicates uplift and exhumation of the compressed rock in the orogenic belt or forearc. [ 16 ] At stage 2 retrograde metamorphism, further decompression and cooling occur at a slow rate, implying further erosion after the tectonic event.

  9. Partial melting - Wikipedia

    en.wikipedia.org/wiki/Partial_melting

    Partial melting is the phenomenon that occurs when a rock is subjected to temperatures high enough to cause certain minerals to melt, but not all of them. Partial melting is an important part of the formation of all igneous rocks and some metamorphic rocks (e.g., migmatites), as evidenced by a multitude of geochemical, geophysical and petrological studies.