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  2. Schreinemaker's analysis - Wikipedia

    en.wikipedia.org/wiki/Schreinemaker's_analysis

    Schreinemaker's analysis. Schreinemaker's Analysis is the use of Schreinemaker's Rules to create a phase diagram. After applying Schreinemaker's Rules and creating a phase diagram, the resulting geometric figure will be thermodynamically accurate, although the axes will be undetermined. In order to determine the correct orientation of the ...

  3. Phase plane - Wikipedia

    en.wikipedia.org/wiki/Phase_plane

    In applied mathematics, in particular the context of nonlinear system analysis, a phase plane is a visual display of certain characteristics of certain kinds of differential equations; a coordinate plane with axes being the values of the two state variables, say (x, y), or (q, p) etc. (any pair of variables). It is a two-dimensional case of the ...

  4. Phase portrait - Wikipedia

    en.wikipedia.org/wiki/Phase_portrait

    The equation of motion is. In mathematics, a phase portrait is a geometric representation of the orbits of a dynamical system in the phase plane. Each set of initial conditions is represented by a different point or curve. Phase portraits are an invaluable tool in studying dynamical systems.

  5. Otto cycle - Wikipedia

    en.wikipedia.org/wiki/Otto_cycle

    The cycle is closed by the exhaust (4-0 and colored blue) stroke, characterized by isochoric cooling and isobaric compression processes. Temperature-Entropy diagram. An Otto cycle is an idealized thermodynamic cycle that describes the functioning of a typical spark ignition piston engine. It is the thermodynamic cycle most commonly found in ...

  6. Critical point (thermodynamics) - Wikipedia

    en.wikipedia.org/wiki/Critical_point...

    Supercritical ethane, fluid. [ 1 ] In thermodynamics, a critical point (or critical state) is the end point of a phase equilibrium curve. One example is the liquid–vapor critical point, the end point of the pressure–temperature curve that designates conditions under which a liquid and its vapor can coexist. At higher temperatures, the gas ...

  7. Phase (waves) - Wikipedia

    en.wikipedia.org/wiki/Phase_(waves)

    Plot of one cycle of a sinusoidal function. The phase for each argument value, relative to the start of the cycle, is shown at the bottom, in degrees from 0° to 360° and in radians from 0 to 2π. In physics and mathematics, the phase (symbol φ or ϕ) of a wave or other periodic function of some real variable (such as time) is an angle -like ...

  8. CALPHAD - Wikipedia

    en.wikipedia.org/wiki/CALPHAD

    [4] [5] [6] The CALPHAD approach is based on the fact that a phase diagram is a manifestation of the equilibrium thermodynamic properties of the system, which are the sum of the properties of the individual phases. [7] It is thus possible to calculate a phase diagram by first assessing the thermodynamic properties of all the phases in a system.

  9. Carnot cycle - Wikipedia

    en.wikipedia.org/wiki/Carnot_cycle

    A Carnot cycle is an ideal thermodynamic cycle proposed by French physicist Sadi Carnot in 1824 and expanded upon by others in the 1830s and 1840s. By Carnot's theorem, it provides an upper limit on the efficiency of any classical thermodynamic engine during the conversion of heat into work, or conversely, the efficiency of a refrigeration system in creating a temperature difference through ...